CN113929352B - Imitation ceramic material and preparation method and application thereof - Google Patents

Imitation ceramic material and preparation method and application thereof Download PDF

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CN113929352B
CN113929352B CN202010605805.4A CN202010605805A CN113929352B CN 113929352 B CN113929352 B CN 113929352B CN 202010605805 A CN202010605805 A CN 202010605805A CN 113929352 B CN113929352 B CN 113929352B
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parts
ceramic
boron nitride
titanium dioxide
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CN113929352A (en
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张玲玲
刘芳
林信平
胡锐
李震
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BYD Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
    • C04B26/02—Macromolecular compounds
    • C04B26/10—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
    • C04B26/02—Macromolecular compounds
    • C04B26/10—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B26/18—Polyesters; Polycarbonates
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C04B2111/2038—Resistance against physical degradation
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength

Abstract

The invention relates to a ceramic-like material and a preparation method and application thereof. Based on the total weight of the ceramic-like material, the ceramic-like material comprises 30-60 parts by weight of silicon oxide, 5-15 parts by weight of zinc oxide, 5-20 parts by weight of boron nitride, 5-10 parts by weight of titanium dioxide and 20-30 parts by weight of organic polymer material. The imitation ceramic material has low hardness, is beneficial to subsequent processing treatment, has high strength and high impact resistance under the condition of low hardness, has the texture of ceramic, does not need high-temperature sintering, and reduces the production cost.

Description

Ceramic-like material and preparation method and application thereof
Technical Field
The invention relates to the field of ceramic imitation materials, in particular to a ceramic imitation material and a preparation method and application thereof.
Background
Ceramics have excellent properties such as abrasion resistance, high temperature resistance, corrosion resistance, and excellent appearance, and thus, they have become one of the materials for mobile phone housings in the 5G era. But the poor fall resistance of ceramics limits the application of ceramics as the casing of mobile phones. The plastic has excellent properties of low dielectric constant, good toughness and the like, and is generally applied to the mobile phone back plate. The plastic back plate has poor temperature resistance and stability and is not wear-resistant, and the appearance of the plastic back plate can not meet the requirements of consumers on the appearance of the mobile phone. Therefore, there is a need for a ceramic-like material that has the texture of ceramic, combines the excellent properties of plastics, is lightweight, and is suitable for the age of 5G.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provide a ceramic-like material, a preparation method and application thereof.
The first aspect of the invention provides a ceramic imitation material, which comprises 30-60 parts by weight of silicon oxide, 5-15 parts by weight of zinc oxide, 5-20 parts by weight of boron nitride and 20-30 parts by weight of organic polymer material based on the total weight of the ceramic imitation material.
Preferably, the ceramic imitation material also comprises 5-10 parts by weight of titanium dioxide; further preferably, the ceramic-like material comprises 35-60 parts by weight of silicon oxide, 5-15 parts by weight of zinc oxide, 5-10 parts by weight of boron nitride, 5-10 parts by weight of titanium dioxide and 20-30 parts by weight of organic polymer material.
Preferably, the ceramic-like material further comprises 0.2-10 parts by weight of graphite; further preferably, the ceramic-like material comprises 0.2-5 parts by weight of graphite.
Preferably, the ceramic-like material further comprises 5-20 parts by weight of fibers, wherein the fibers comprise one or more of glass fibers, carbon fibers and mineral fibers; further preferably, the ceramic-like material comprises 5-15 parts by weight of fibers.
Preferably, the organic polymer material includes one or more of polyphenylene sulfide, polyamide, polybutylene terephthalate, and polycarbonate.
Preferably, the density of the ceramic-like material is 2.3-2.5g/cm 3 The tensile strength is more than or equal to 45MPa, the bending strength is more than or equal to 50MPa, the Vickers hardness is not more than 45HV, and the drop weight height is more than or equal to 20cm.
The second aspect of the invention provides a preparation method of a ceramic imitation material, which comprises the following steps:
s1, putting 30-60 parts by weight of silicon oxide, 5-15 parts by weight of zinc oxide, 5-20 parts by weight of boron nitride and 20-30 parts by weight of organic polymer material into an extruder to be extruded to obtain a feed;
and S2, carrying out injection molding on the feed in an injection molding machine to obtain the ceramic-like material.
Preferably, at least one of the following substances can be added in the step S1:
5-10 parts by weight of titanium dioxide;
0.2 to 10 parts by weight of graphite;
5-20 parts by weight of fibers;
further preferably, the titanium dioxide has a D50 of 0.3 to 1 μm;
further preferably, the graphite has a D50 of 0.3 to 1 μm;
further preferably, the fibers comprise one or more of glass fibers, carbon fibers and mineral fibers; the D50 of the fiber is 0.1-10 μm.
Preferably, before the step S1, at least one of the silicon oxide, the zinc oxide, the boron nitride, the titanium dioxide and the graphite is subjected to a surface modification treatment with a modifier, wherein the modifier comprises one or more of titanate, stearic acid, a silane coupling agent, zirconate and aluminate; preferably, the D50 of the silicon oxide is 0.3-1 μm, the D50 of the zinc oxide is 0.3-1 μm, and the D50 of the boron nitride is 0.3-1 μm.
Preferably, the extrusion temperature of the extrusion is 290-335 ℃; the injection molding temperature of the injection molding is 300-340 ℃, the injection pressure is 100-200MPa, and the pressure maintaining time is 10-90s;
the organic polymer material comprises one or more of polyphenylene sulfide, polyamide, polybutylene terephthalate and polycarbonate.
The third aspect of the invention provides an application of the ceramic-like material or the ceramic-like material obtained by the preparation method in the shell of electronic products.
According to the imitation ceramic material provided by the invention, the silicon oxide, the zinc oxide and the boron nitride with Mohs hardness of less than or equal to 7.0 are selected, so that the imitation ceramic material has low hardness and is beneficial to subsequent processing (such as CNC, polishing and the like); under the condition of low hardness, the material contains silicon oxide, zinc oxide and boron nitride in specific contents, and the substances act synergistically, so that the ceramic-like material has high strength, good impact resistance and the texture of ceramics.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Detailed Description
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.
The invention provides a ceramic-like material, which comprises 30-60 parts by weight of silicon oxide, 5-15 parts by weight of zinc oxide, 5-20 parts by weight of boron nitride, 5-10 parts by weight of titanium dioxide and 20-30 parts by weight of organic polymer material based on the total weight of the ceramic-like material.
In the present invention, although the effects that the addition of various inorganic powders may bring to the organic polymer material, for example, the effects that silica may bring to the improvement of mechanical strength and the improvement of fluidity; zinc oxide may bring about an effect of improving impact toughness; boron nitride may have the effect of improving wear resistance. However, when the above-mentioned pseudo-ceramic material provided by the present invention contains the above-mentioned specific content, a pseudo-ceramic material having a ceramic texture can be obtained synergistically, which has a low hardness, and which has both a high strength and a high impact resistance.
In the present invention, the ceramic-like material may further include at least one of:
5-10 parts by weight of titanium dioxide;
0.2 to 10 parts by weight of graphite;
5-20 parts by weight of fiber.
In the invention, in order to further improve the mechanical property of the ceramic imitation material and improve the yellowing problem, the ceramic imitation material also comprises 5-10 parts by weight of titanium dioxide. Preferably, 35 to 60 parts by weight of silicon oxide, 5 to 15 parts by weight of zinc oxide, 5 to 10 parts by weight of boron nitride, 5 to 10 parts by weight of titanium dioxide and 20 to 30 parts by weight of an organic polymer material.
In the invention, in order to further reduce the hardness of the ceramic-like material, the ceramic-like material can also comprise 0.2 to 10 parts by weight of graphite; preferably, the ceramic-like material comprises 0.2-5 parts by weight of graphite. After the graphite is added into the ceramic-like material, the ceramic-like material can be transited from white to black to obtain the black ceramic-like material.
In the invention, in order to further improve the mechanical property of the ceramic imitation material, preferably, the ceramic imitation material also comprises 5-20 parts by weight of fibers; further preferably, the ceramic-like material comprises 5-15 parts by weight of fibers. Preferably, the fiber comprises one or more of glass fiber, carbon fiber and mineral fiber; the D50 of the fiber is 0.1-10 μm.
In the present invention, preferably, the organic polymer material includes one or more of polyphenylene sulfide (PPS), polyamide (PA), polybutylene terephthalate (PBT), and Polycarbonate (PC). In order to further improve the mechanical property of the material and reduce the melting temperature of the material, thereby reducing the processing difficulty, preferably, the organic polymer material can be a polyphenylene sulfide-based blend; specifically, the polyphenylene sulfide-based blend may be mainly composed of polyphenylene sulfide, and one or more of polyamide, polybutylene terephthalate, and polycarbonate high molecular polymer or alloy thereof may be mixed.
The imitation ceramic material provided by the invention has low hardness and good toughness, and is beneficial to processing such as polishing, CNC (computerized numerical control) processing and the like if being used for preparing electronic equipment. Preferably, the Vickers hardness of the pseudoceramic material does not exceed 45HV, preferably is 25-43HV. The imitation ceramic material provided by the invention has low hardness, but also has high strength and high impact resistance. Preferably, the tensile strength of the ceramic-like material is greater than or equal to 45MPa, and the bending strength is greater than or equal to 50MPa; the height of the ceramic-like material capable of bearing 60g of drop weight is more than or equal to 20cm. The drop height can be measured, but is not limited to, by pounding the ceramic-like material with a drop weight of 60g at a preset drop height.
The ceramic imitation material provided by the invention preferably has the density of 2.3-2.5g/cm 3 The ceramic has the texture of ceramic, and has the advantage of light weight compared with the existing zirconia ceramic.
The invention also provides a preparation method of the imitation ceramic material, which comprises the following steps:
s1, putting 30-60 parts by weight of silicon oxide, 5-15 parts by weight of zinc oxide, 5-20 parts by weight of boron nitride and 20-30 parts by weight of organic polymer material into an extruder to extrude to obtain a feed;
and S2, performing injection molding on the feed in an injection molding machine to obtain the ceramic-like material.
According to the preparation method of the imitation ceramic material, the content of each component of the imitation ceramic material is controlled within the range of the application in the preparation process, so that the system has high melt index and good fluidity, and the imitation ceramic material is easy to process and inject. Preferably, the melt index of the feedstock obtained in step S1 is greater than 7g/10min/290 ℃. The imitation ceramic material prepared by the preparation method of the imitation ceramic material provided by the invention has low hardness, high strength and high impact resistance, and has the texture of ceramic.
In the present invention, at least one of the following substances may be further added in the step S1:
5-10 parts by weight of titanium dioxide;
0.2 to 10 parts by weight of graphite;
5-20 parts by weight of fiber.
In the invention, in order to further improve the mechanical property of the imitation ceramic material and improve the yellowing problem, the imitation ceramic material also comprises 5-10 parts by weight of titanium dioxide. Preferably, the ceramic-like material comprises 35-60 parts by weight of silicon oxide, 5-15 parts by weight of zinc oxide, 5-10 parts by weight of boron nitride, 5-10 parts by weight of titanium dioxide and 20-30 parts by weight of organic polymer material.
In the invention, in order to further reduce the hardness of the ceramic-like material, the ceramic-like material can also comprise 0.2 to 10 parts by weight of graphite; preferably, the ceramic-like material comprises 0.2-5 parts by weight of graphite. After the graphite is added into the ceramic-like material, the ceramic-like material can be transited from white to black to obtain a black ceramic-like material.
In the invention, in order to further improve the mechanical property of the ceramic-like material, preferably, the ceramic-like material also comprises 5-20 parts by weight of fibers; further preferably, the ceramic-like material comprises 5-15 parts by weight of fibers. Preferably, the fiber comprises one or more of glass fiber, carbon fiber and mineral fiber; the D50 of the fiber is 0.1-10 μm.
In the present invention, in order to further improve the compatibility with the organic polymer material in the silicon oxide, zinc oxide, boron nitride, titanium dioxide, and graphite, preferably, before the step S1, at least one of the silicon oxide, zinc oxide, boron nitride, titanium dioxide, and graphite is subjected to a surface modification treatment with a modifier, where the modifier includes one or more of titanate, stearic acid, a silane coupling agent, zirconate, and aluminate. Preferably, the content of the modifier is 0.5 to 1.5wt% based on the total amount of the surface-modification treated substance. Optionally, the modifier is present in an amount of 0.5 to 1.5wt% of the total amount of silicon oxide, zinc oxide and boron nitride; optionally, the modifier is present in an amount of 0.5 to 1.5wt% of the total amount of silica, zinc oxide, boron nitride and titanium dioxide; optionally, the modifier is present in an amount of 0.5 to 1.5wt% of the total amount of silica, zinc oxide, boron nitride, titanium dioxide and graphite.
In the invention, in order to further improve the dispersibility of the silicon oxide, the zinc oxide, the boron nitride, the titanium dioxide and the graphite in the system and further improve the mechanical property of the prepared ceramic-like material, preferably, the D50 of the silicon oxide is 0.3-1 μm, the D50 of the zinc oxide is 0.3-1 μm, the D50 of the boron nitride is 0.3-1 μm, the D50 of the titanium dioxide is 0.3-1 μm, and the D50 of the graphite is 0.3-1 μm. Further preferably, the D50 of the silicon oxide is 0.5-0.8 μm, the D50 of the zinc oxide is 0.5-0.8 μm, the D50 of the boron nitride is 0.5-0.8 μm, the D50 of the titanium dioxide is 0.5-0.8 μm, and the D50 of the graphite is 0.5-0.8 μm.
In the invention, in order to improve the uniformity of the product, preferably, the raw materials are mixed and then put into an extruder to be extruded to obtain a feed material; the mixing time can be 0.5-3h, and the raw materials are uniformly mixed. Preferably, the extrusion temperature of the extrusion is 290-335 ℃. And (3) performing injection molding on the feed in an injection molding machine, wherein the injection molding temperature is 300-340 ℃, the injection pressure is 100-200MPa, and the pressure maintaining time is 10-90s.
In the present invention, preferably, the organic polymer material includes one or more of polyphenylene sulfide (PPS), polyamide (PA), polybutylene terephthalate (PBT), and Polycarbonate (PC). In order to further improve the mechanical property of the material and reduce the melting temperature of the material, thereby reducing the processing difficulty, preferably, the organic polymer material can be a polyphenylene sulfide-based blend; specifically, the polyphenylene sulfide-based blend may be mainly composed of polyphenylene sulfide, and one or more of polyamide, polybutylene terephthalate, and polycarbonate high molecular polymer or alloy thereof may be mixed.
The invention also provides application of the ceramic-like material in a shell of an electronic product. For example, the method can be applied to a mobile phone shell or a wearable device shell, and specifically, the method can be applied to a mobile phone shell, a mobile phone middle frame, an integrated mobile phone shell middle frame, a watch rear cover or a watch middle frame, and the like. The ceramic imitation material is simple in process preparation, easy to machine and injection mold, free of sintering and greatly reduced in manufacturing cost; in addition, the imitation ceramic material provided by the invention has high strength and high impact resistance, has ceramic texture and meets the performance requirements of electronic product shells.
The present invention will be described in detail below by way of examples, but the present invention is not limited to the following examples.
Example 1
The preparation method of the ceramic-like material of the embodiment comprises the following steps:
weighing 4.4Kg of silicon oxide with the median particle size D50 of 0.5 mu m, 0.8Kg of zinc oxide with the D50 of 0.5 mu m and 0.8Kg of boron nitride with the D50 of 0.3 mu m, then adding 60g of gamma-aminopropyltriethoxysilane into a mixer, and stirring for 1h to obtain modified ceramic composite powder;
weighing 2.0KgPPS plastic, adding the PPS plastic into a mixer, mixing for 1 hour to obtain a plastic-ceramic composite material, heating a screw extruder to 300 ℃, extruding the plastic-ceramic composite material by the screw extruder, and granulating to obtain a feed;
and (3) loading the feed into a hopper of an injection molding machine, installing an injection mold, setting the temperature of a charging basket of the injection molding machine to be 320 ℃, the injection pressure to be 120MPa, the pressure maintaining time to be 10S and the mold temperature to be 120 ℃, and performing injection molding to obtain the ceramic-like material S1. The imitation ceramic material S1 comprises the following components in percentage by weight: 55 parts by weight of silicon oxide, 10 parts by weight of zinc oxide, 10 parts by weight of boron nitride and 25 parts by weight of PPS plastic.
Example 2
The preparation method of the ceramic-like material of the embodiment comprises the following steps:
weighing 3.6Kg of silicon oxide with a median particle size D50 of 0.5 mu m, 0.8Kg of D50 of 0.5 mu m of zinc oxide and 0.8Kg of boron nitride with D50 of 0.3 mu m, weighing 0.8Kg of titanium dioxide with D50 of 0.3 mu m, adding 60g of gamma-aminopropyltriethoxysilane into a mixer, and stirring for 1h to obtain modified ceramic composite powder;
weighing 2.0KgPPS plastic, adding the weighed PPS plastic into a mixer, mixing for 1 hour to obtain a plastic ceramic composite material, heating a screw extruder to 300 ℃, extruding the plastic ceramic composite material by the screw extruder, and granulating to obtain a feed material;
and (3) loading the feed into a hopper of an injection molding machine, installing an injection mold, setting the temperature of a charging basket of the injection molding machine to be 320 ℃, the injection pressure to be 120MPa, the pressure maintaining time to be 10S and the mold temperature to be 120 ℃, and performing injection molding to obtain the ceramic-like material S2. The imitation ceramic material S2 comprises the following components in percentage by weight: 45 parts by weight of silicon oxide, 10 parts by weight of zinc oxide, 10 parts by weight of boron nitride, 10 parts by weight of titanium dioxide and 25 parts by weight of PPS plastic.
Example 3
The preparation method of the ceramic-like material of the embodiment comprises the following steps:
weighing 3.6Kg of silicon oxide with a median particle size D50 of 0.5 mu m, 0.8Kg of D50 of 0.5 mu m of zinc oxide and 0.8Kg of boron nitride with D50 of 0.3 mu m, weighing 0.8Kg of titanium dioxide with D50 of 0.3 mu m, adding 60g of gamma-aminopropyltriethoxysilane into a mixer, and stirring for 1h to obtain modified ceramic composite powder;
weighing 1.44KgPPS plastic and 0.56KgPBT plastic, adding the materials into a mixer, mixing for 1h to obtain a plastic-ceramic composite material, heating a screw extruder to 300 ℃, extruding the plastic-ceramic composite material by the screw extruder, and granulating to obtain a feed material;
and (3) loading the feed into a hopper of an injection molding machine, installing an injection mold, setting the temperature of a charging basket of the injection molding machine to be 320 ℃, the injection pressure to be 120MPa, the pressure maintaining time to be 10S and the mold temperature to be 120 ℃, and performing injection molding to obtain the ceramic-like material S3. The imitation ceramic material S3 comprises the following components in percentage by weight: 45 parts by weight of silicon oxide, 10 parts by weight of zinc oxide, 10 parts by weight of boron nitride, 10 parts by weight of titanium dioxide, 18 parts by weight of PPS and 7 parts by weight of PBT plastic polymer blend matrix.
Examples 4 to 11
Examples 4 to 11 each provide a method for producing a pseudo ceramic material, which is the same as in example 1 except that the kind or the parts by weight of the raw materials used are different. The contents of the respective components in the mixed raw materials of examples 4 to 11 are specifically shown in Table 1.
Comparative example 1
The preparation method of the ceramic-like material of the comparative example comprises the following steps:
weighing 4.4Kg of silicon oxide with the median particle size D50 of 0.5 mu m, 0.8Kg of zinc oxide with the D50 of 0.5 mu m, weighing 0.8Kg of titanium dioxide with the D50 of 0.3 mu m, adding 60g of gamma-aminopropyltriethoxysilane into a mixer, and stirring for 1h to obtain modified ceramic composite powder;
weighing 2.0KgPPS plastic, adding the weighed PPS plastic into a mixer, mixing for 1 hour to obtain a plastic ceramic composite material, heating a screw extruder to 300 ℃, extruding the plastic ceramic composite material by the screw extruder, and granulating to obtain a feed material;
and (3) loading the feed into a hopper of an injection molding machine, installing an injection mold, setting the temperature of the charging basket of the injection molding machine to be 320 ℃, the injection pressure to be 120MPa, the pressure maintaining time to be 10s and the mold temperature to be 120 ℃, and performing injection molding to obtain the imitation ceramic material D1. The imitation ceramic material D1 comprises the following components in percentage by weight: 55 parts by weight of silicon oxide, 10 parts by weight of zinc oxide, 10 parts by weight of titanium dioxide and 25 parts by weight of PPS plastic.
Comparative example 2
The preparation method of the imitation ceramic material of the comparative example comprises the following steps:
weighing 4.4Kg of silicon oxide with the median particle size D50 of 0.5 mu m, 0.8Kg of boron nitride with the D50 of 0.3 mu m, weighing 0.8Kg of titanium dioxide with the D50 of 0.3 mu m, adding 60g of gamma-aminopropyltriethoxysilane into a mixer, and stirring for 1h to obtain modified ceramic composite powder;
weighing 2.0KgPPS plastic, adding the weighed PPS plastic into a mixer, mixing for 1 hour to obtain a plastic ceramic composite material, heating a screw extruder to 300 ℃, extruding the plastic ceramic composite material by the screw extruder, and granulating to obtain a feed material;
and (3) loading the feed into a hopper of an injection molding machine, installing an injection mold, setting the temperature of a charging basket of the injection molding machine to be 320 ℃, the injection pressure to be 120MPa, the pressure maintaining time to be 10s and the mold temperature to be 120 ℃, and performing injection molding to obtain the imitation ceramic material D2. The imitation ceramic material D2 comprises the following components in percentage by weight: 55 parts by weight of silicon oxide, 10 parts by weight of boron nitride, 10 parts by weight of titanium dioxide and 25 parts by weight of PPS plastic.
Comparative example 3
The preparation method of the imitation ceramic material of the comparative example comprises the following steps:
weighing 3.6Kg of zinc oxide with the median particle size D50 of 0.5 mu m, 0.8Kg of silicon oxide with the D50 of 0.5 mu m and 0.8Kg of boron nitride with the D50 of 0.3 mu m, weighing 0.8Kg of titanium dioxide with the D50 of 0.3 mu m, adding 60g of gamma-aminopropyltriethoxysilane into a mixer, and stirring for 1h to obtain modified ceramic composite powder;
weighing 2.0KgPPS plastic, adding the PPS plastic into a mixer, mixing for 1 hour to obtain a plastic-ceramic composite material, heating a screw extruder to 300 ℃, extruding the plastic-ceramic composite material by the screw extruder, and granulating to obtain a feed;
and (3) loading the feed into a hopper of an injection molding machine, installing an injection mold, setting the temperature of the charging basket of the injection molding machine to be 320 ℃, the injection pressure to be 120MPa, the pressure maintaining time to be 10s, and the temperature of the mold to be 120 ℃, and performing injection molding to obtain the imitation ceramic material D4. The imitation ceramic material D4 comprises the following components in percentage by weight: 45 parts by weight of zinc oxide, 10 parts by weight of silicon oxide, 10 parts by weight of boron nitride, 10 parts by weight of titanium dioxide and 25 parts by weight of PPS plastic.
Comparative example 4
The preparation method of the ceramic-like material of the comparative example comprises the following steps:
weighing 5.2Kg of silicon oxide with the median particle size D50 of 0.5 mu m, 0.32Kg of zinc oxide with the D50 of 0.5 mu m and 0.24Kg of boron nitride with the D50 of 0.3 mu m, weighing 0.24Kg of titanium dioxide with the D50 of 0.3 mu m, adding 60g of gamma-aminopropyltriethoxysilane into a mixer, and stirring for 1h to obtain modified ceramic composite powder;
weighing 2.0KgPPS plastic, adding the PPS plastic into a mixer, mixing for 1 hour to obtain a plastic-ceramic composite material, heating a screw extruder to 300 ℃, extruding the plastic-ceramic composite material by the screw extruder, and granulating to obtain a feed;
and (3) loading the feed into a hopper of an injection molding machine, installing an injection mold, setting the temperature of the charging basket of the injection molding machine to be 320 ℃, the injection pressure to be 120MPa, the pressure maintaining time to be 10s, and the temperature of the mold to be 120 ℃, and performing injection molding to obtain the imitation ceramic material D4. The imitation ceramic material D4 comprises the following components in percentage by weight: 65 parts by weight of silicon oxide, 4 parts by weight of zinc oxide, 3 parts by weight of boron nitride, 3 parts by weight of titanium dioxide and 25 parts by weight of PPS plastic.
And (3) performance testing:
(1) The raw materials of the ceramic-like material were placed in an extruder and extruded to obtain a feedstock, the melt index of which was tested in accordance with ASTM D1238-04, wherein the melt temperature was 290 ℃.
(2) The following performance tests were performed on the ceramic-like material:
density/g/cm 3 : the test was performed with reference to ISO 1183-1;
tensile strength: testing with reference to ASTM D638;
bending strength: testing with reference to ASTM D790;
hardness: vickers hardness, a hardness meter and an indentation method (a diamond pressure head, a force of 1kg and a pressure test time of 10 s);
drop weight test: the test was carried out with reference to ASTM E208, in which the center position of the sample was hammered using a drop weight of 60g, starting from a height of 5cm and increasing, if not cracked, at a height of 5cm each time until the sample stopped cracking visible to the naked eye, and the height value was recorded;
ceramic texture: knocking the zirconia ceramics by using a stainless steel sheet, knocking the imitation ceramic material by using stainless steel on the basis of the sound emitted by the zirconia ceramics, wherein more than 80% of the sound emitted by the imitation ceramic material is close to the sound emitted by the zirconia ceramics, and the sound is marked as A + level; every 10 percent is a gradient, more than 50 percent of the sound emitted by the ceramic simulating material is close to the sound emitted by the zirconia ceramic, and the grade is marked as B +; wherein, the closer the sound emitted by the ceramic-like material is to the sound emitted by the zirconia ceramic, the better the texture of the ceramic is, and the more ceramic-like the appearance is.
TABLE 1 data table of the components of the mixed raw materials and parts by weight in examples and comparative examples
Figure DEST_PATH_IMAGE001
TABLE 2
Figure 349601DEST_PATH_IMAGE002
As can be seen from the data in Table 2, the ceramic-like material provided by the application satisfies the conditions that the melt index is more than 7g/10min/290 ℃, and the density is 2.3-2.5g/cm 3 The tensile strength is more than or equal to 45MPa, the bending strength is more than or equal to 50MPa, the Vickers hardness is not more than 45HV, the drop weight height is more than or equal to 20cm, and the comprehensive performance is excellent; wherein, the raw material of the ceramic-like material is put into an extruder to be extruded to obtain feed with high melt index, and the ceramic-like material is easy to be formed by injection molding; the hardness is low, so that subsequent processing such as CNC, polishing and the like is facilitated; the strength is high, and the shock resistance is good; and the porcelain quality effect is good. None of comparative examples 1-6, however, are as good as examples 1-11 while meeting the performance described above; among them, comparative example 1 has high hardness and poor impact resistance; comparative example 2 has low strength and poor impact resistance; comparative example 3 the melt index is very low, the ceramic-like material is very difficult to obtain by injection molding, and the density is high, thus being not beneficial to light weight; comparative examples 4 to 6 had low strength and poor impact resistance.
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are all within the protection scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention can be made, and the same should be considered as the disclosure of the present invention as long as the idea of the present invention is not violated.

Claims (17)

1. The ceramic-like material is characterized by comprising 30-60 parts by weight of silicon oxide, 5-15 parts by weight of zinc oxide, 5-20 parts by weight of boron nitride and 20-30 parts by weight of organic high polymer material, wherein the organic high polymer material comprises one or more of polyphenylene sulfide, polyamide, polybutylene terephthalate and polycarbonate.
2. The ceramic-like material according to claim 1, further comprising 5 to 10 parts by weight of titanium dioxide.
3. The ceramic imitation material of claim 2, wherein the ceramic imitation material comprises 35-60 parts by weight of silicon oxide, 5-15 parts by weight of zinc oxide, 5-10 parts by weight of boron nitride, 5-10 parts by weight of titanium dioxide, and 20-30 parts by weight of an organic polymer material.
4. The ceramic simulating material of claim 1, further comprising 0.2-10 parts by weight of graphite.
5. The ceramic-like material of claim 4, wherein the ceramic-like material comprises 0.2 to 5 parts by weight of graphite.
6. The ceramic-like material of claim 1, further comprising 5-20 parts by weight of fibers, wherein the fibers comprise one or more of glass fibers, carbon fibers, and mineral fibers.
7. The ceramic simulating material of claim 6, wherein the ceramic simulating material comprises 5-15 parts by weight of the fibers.
8. The method of claim 1The ceramic-like material is characterized in that the density of the ceramic-like material is 2.3-2.5g/cm 3 The tensile strength is more than or equal to 45MPa, the bending strength is more than or equal to 50MPa, the Vickers hardness is not more than 45HV, and the drop weight height is more than or equal to 20cm.
9. A preparation method of a ceramic-like material is characterized by comprising the following steps:
s1, putting 30-60 parts by weight of silicon oxide, 5-15 parts by weight of zinc oxide, 5-20 parts by weight of boron nitride and 20-30 parts by weight of organic polymer material into an extruder to be extruded to obtain a feed material, wherein the organic polymer material comprises one or more of polyphenylene sulfide, polyamide, polybutylene terephthalate and polycarbonate;
and S2, carrying out injection molding on the feed in an injection molding machine to obtain the ceramic-like material.
10. The method according to claim 9, wherein at least one of the following substances is further added in step S1:
5-10 parts by weight of titanium dioxide;
0.2 to 10 parts by weight of graphite;
5-20 parts by weight of fiber.
11. The method according to claim 10, wherein the titanium dioxide has a D50 of 0.3 to 1 μm.
12. The method according to claim 10, wherein the graphite has a D50 of 0.3 to 1 μm.
13. The method of claim 10, wherein the fibers comprise one or more of glass fibers, carbon fibers, and mineral fibers; the D50 of the fiber is 0.1-10 μm.
14. The method according to claim 9, wherein before the step S1, at least one of the silica, the zinc oxide, the boron nitride, the titanium dioxide and the graphite is subjected to a surface modification treatment with a modifier, and the modifier comprises one or more of titanate, stearic acid, a silane coupling agent, zirconate and aluminate.
15. The method according to claim 14, wherein the silicon oxide has a D50 of 0.3 to 1 μm, the zinc oxide has a D50 of 0.3 to 1 μm, and the boron nitride has a D50 of 0.3 to 1 μm.
16. The method of claim 9, wherein the extrusion temperature of the extrusion is 290-335 ℃; the injection molding temperature of the injection molding is 300-340 ℃, the injection pressure is 100-200MPa, and the pressure maintaining time is 10-90s.
17. Use of the ceramic-like material according to any one of claims 1 to 8 or the ceramic-like material obtained by the preparation method according to any one of claims 9 to 16 in a housing of an electronic product.
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