CN115893480A - Zinc titanate powder suitable for plasma spraying, preparation method and application - Google Patents
Zinc titanate powder suitable for plasma spraying, preparation method and application Download PDFInfo
- Publication number
- CN115893480A CN115893480A CN202211517720.6A CN202211517720A CN115893480A CN 115893480 A CN115893480 A CN 115893480A CN 202211517720 A CN202211517720 A CN 202211517720A CN 115893480 A CN115893480 A CN 115893480A
- Authority
- CN
- China
- Prior art keywords
- powder
- zinc
- plasma spraying
- orthotitanate
- zinc titanate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007750 plasma spraying Methods 0.000 title claims abstract description 41
- DJSKLKQRHSKRDZ-UHFFFAOYSA-N zinc dioxido(oxo)titanium Chemical compound [Zn+2].[O-][Ti]([O-])=O DJSKLKQRHSKRDZ-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 239000000843 powder Substances 0.000 claims abstract description 81
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 55
- ZBFOLPMOGPIUGP-UHFFFAOYSA-N dizinc;oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[O-2].[O-2].[Ti+4].[Zn+2].[Zn+2] ZBFOLPMOGPIUGP-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 25
- 238000000498 ball milling Methods 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 22
- 239000002245 particle Substances 0.000 claims abstract description 22
- 238000003756 stirring Methods 0.000 claims abstract description 22
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 17
- 239000007921 spray Substances 0.000 claims abstract description 17
- 238000001694 spray drying Methods 0.000 claims abstract description 17
- 239000002270 dispersing agent Substances 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 16
- 238000009736 wetting Methods 0.000 claims abstract description 16
- 238000002156 mixing Methods 0.000 claims abstract description 15
- 239000008367 deionised water Substances 0.000 claims abstract description 13
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000011248 coating agent Substances 0.000 claims abstract description 12
- 238000000576 coating method Methods 0.000 claims abstract description 12
- 239000011812 mixed powder Substances 0.000 claims abstract description 9
- 238000007873 sieving Methods 0.000 claims abstract description 7
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000011701 zinc Substances 0.000 claims abstract description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 4
- 230000002572 peristaltic effect Effects 0.000 claims description 6
- 238000005563 spheronization Methods 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 abstract description 4
- 230000001070 adhesive effect Effects 0.000 abstract description 4
- 239000000945 filler Substances 0.000 abstract description 3
- 230000003595 spectral effect Effects 0.000 abstract description 2
- LLZRNZOLAXHGLL-UHFFFAOYSA-J titanic acid Chemical compound O[Ti](O)(O)O LLZRNZOLAXHGLL-UHFFFAOYSA-J 0.000 abstract 2
- 238000005303 weighing Methods 0.000 description 10
- 238000012360 testing method Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000000635 electron micrograph Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 238000009818 secondary granulation Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 229910052596 spinel Inorganic materials 0.000 description 2
- 239000011029 spinel Substances 0.000 description 2
- 230000001464 adherent effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Images
Abstract
The invention discloses zinc titanate powder suitable for plasma spraying, a preparation method and application, and relates to the technical field of spacecraft thermal control coating fillers. The method comprises the following steps: uniformly mixing zinc oxide powder and titanium dioxide powder according to the mol ratio of 2.05-2.15, and carrying out plasma ball milling treatment to obtain pre-activated mixed powder; heating the pre-activated mixed powder to 800-900 ℃, and reacting to obtain zinc titanate powder; adding deionized water and a wetting dispersant into the zinc orthotitanate powder prepared in the step S2, and uniformly stirring and mixing to obtain a zinc orthotitanate solution; and (3) carrying out spray drying treatment on the zinc titanate solution through a spray dryer, and sieving to obtain the zinc titanate powder suitable for plasma spraying. The sphericity and the particle size of the orthotitanic acid zinc powder suitable for plasma spraying are suitable for plasma spraying, the material can be directly and strongly attached to the surface of a base material without an adhesive, and the orthotitanic acid zinc powder has good spectral reflection performance and infrared emission performance.
Description
Technical Field
The invention relates to the technical field of spacecraft thermal control coating fillers, in particular to zinc titanate powder suitable for plasma spraying, a preparation method and application.
Background
The thermal control coating is an important component in a passive thermal control system of the spacecraft, is a main means for realizing the heat exchange between the spacecraft and the space environment, and can keep the balance of the energy absorption and radiation on the surface of the spacecraft through the self thermal radiation performance of the coating so as to ensure that the spacecraft reaches the ideal working temperature. Compared with other thermal control coating fillers, the performance of high energy gap (3.8 eV) and high refractive index (n = 2.4) of the spinel semiconductor material zinc orthotitanate (Zn 2T iO 4) enables the spinel semiconductor material to be the best thermal control coating material at present, and in order to ensure that the coating can be effectively attached to the surface of a spacecraft, a bonding agent is required to be added to enable the thermal control material to form a uniform whole and be tightly combined with a base material. However, the spacecraft can be affected by environments such as ultraviolet, particle irradiation, atomic oxygen and the like during on-orbit operation, so that the optical property and the mechanical property of the adhesive are degraded, the optical property of the coating is reduced, even the coating falls off, and the operation life of the spacecraft is seriously threatened.
The plasma spraying technique is a method of heating an oxide material to a molten or semi-molten state using a plasma arc as a heat source and spraying the oxide material at a high speed onto the surface of a pretreated workpiece to form a strongly adherent top coat. The plasma spraying technology can be adopted to directly attach the zinc orthotitanate powder to the surface of the base material, thereby effectively avoiding the problem that the adhesive is degraded in the space environment. Plasma spraying has high requirements on powder, and needs to have the characteristics of smooth surface, good sphericity, moderate particle size, uniform distribution and the like.
Disclosure of Invention
The invention aims to solve the technical problem of providing zinc titanate powder suitable for plasma spraying.
In a first aspect, the present invention provides a method for preparing zinc orthotitanate powder suitable for plasma spraying, comprising:
s1, uniformly mixing zinc oxide powder and titanium dioxide powder according to a molar ratio of 2.05-2.15;
s2, heating the pre-activated mixed powder to 800-900 ℃, and reacting to obtain zinc titanate powder;
s3, adding deionized water and a wetting dispersant into the zinc orthotitanate powder prepared in the step S2, and uniformly stirring and mixing to obtain a zinc orthotitanate solution;
s4, carrying out spray drying treatment on the zinc titanate solution through a spray dryer, and sieving to obtain zinc titanate powder suitable for plasma spraying; the particle size range of the zinc titanate powder suitable for plasma spraying is 30-60 mu m.
The further technical scheme is that the particle size of the zinc oxide powder is 0.3-0.5 mu m, and the purity of the zinc oxide powder is more than 99.99%.
The further technical scheme is that the particle size of the titanium dioxide powder is 0.5-1 mu m, the titanium dioxide powder is rutile phase, and the purity of the titanium dioxide powder is more than 99.99%.
The further technical proposal is that the plasma ball milling treatment is carried out in inert atmosphere; the parameters of the plasma ball milling treatment comprise: the rotating speed of the motor is 500-800r/min, the discharge voltage is 4-8kV, the discharge frequency is 15-25kHz, the ball milling time is 0.5-1h, and the ball-material ratio is 5-10.
The further technical scheme is that in the step S2, the heat preservation time is 2-4h, and the heating rate is 10-20 ℃/min.
The further technical scheme is that in the step S3, the mass of deionized water is 10-15 times of that of the zinc orthotitanate powder, and the mass of the wetting dispersant is 0.5-2% of that of the zinc orthotitanate powder; the wetting dispersant is at least one of BYK-W9010, BYK-102 and BYK 2055.
The further technical scheme is that in the step S3, ultrasonic stirring is adopted for stirring, the stirring time is 2-4h, and the stirring speed is 1000-1500r/min.
The further technical scheme is that the parameters of the spray drying treatment comprise: the diameter of the nozzle of the spray dryer is 1-2mm, the outlet temperature of the spray dryer is 120-150 ℃, and the peristaltic speed of the spray dryer is 20-40ml/min.
In a second aspect, a zinc orthotitanate powder suitable for plasma spraying is prepared by the method of the first aspect.
In a third aspect, the use of a zinc orthotitanate powder suitable for plasma spraying as described in the second aspect for the preparation of a thermal control coating.
Compared with the prior art, the invention can achieve the following technical effects:
the zinc orthotitanate powder suitable for plasma spraying provided by the invention has the following characteristics:
1) Appearance: the powder is white and is uniformly distributed;
2) Particle size D50:30-60 μm;
3) Sphericity: more than or equal to 90 percent;
4) Solar absorptance: 0.07-0.10;
5) Hemispherical emissivity: 0.88-0.90.
Compared with the prior art, the invention has the following beneficial effects: compared with the existing similar materials, the zinc titanate powder suitable for plasma spraying provided by the invention has better spectral reflection performance and infrared emission performance, the sphericity and the particle size of the powder are suitable for the implementation mode of plasma spraying, the material can be directly and strongly attached to the surface of a base material without an adhesive, the degradation influence caused by a space irradiation environment is effectively reduced, and the zinc titanate powder has important significance for the design of a long-life high-stability spacecraft.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is an electron micrograph of zinc orthotitanate powder suitable for plasma spraying, prepared in example 1 of the present invention.
FIG. 2 is an electron micrograph of zinc orthotitanate powder prepared in comparative example 1 of the present invention.
Detailed Description
The technical solutions in the examples will be clearly and completely described below. It is apparent that the embodiments to be described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The embodiment of the invention provides a preparation method of zinc titanate powder suitable for plasma spraying, which comprises the following steps: S1-S4.
S1, uniformly mixing zinc oxide powder and titanium dioxide powder according to a molar ratio of 2.05-2.15.
In the specific implementation, the molar ratio of the zinc oxide powder to the titanium dioxide powder is 2.05-2.15.
Furthermore, the particle size of the zinc oxide powder is 0.3-0.5 μm, and the purity of the zinc oxide powder is more than 99.99%. The zinc oxide powder has high purity and can avoid the influence of impurities.
Furthermore, the particle size of the titanium dioxide powder is 0.5-1 μm, the titanium dioxide powder is rutile phase, and the purity of the titanium dioxide powder is more than 99.99%. The titanium dioxide powder has high purity, and can avoid the influence of impurities.
Further, the plasma spheronization treatment is performed under an inert atmosphere, i.e., under an inert gas atmosphere. The inert atmosphere avoids the influence of oxygen.
Further, carrying out plasma ball milling treatment by a plasma ball milling machine, wherein the parameters of the plasma ball milling treatment comprise: the rotating speed of the motor is 500-800r/min, the discharge voltage is 4-8kV, the discharge frequency is 15-25kHz, the ball milling time is 0.5-1h, and the ball-material ratio is 5-10. The above motor rotation speed refers to the motor rotation speed of the plasma ball mill, the discharge voltage refers to the discharge voltage of the plasma ball mill, and the discharge frequency refers to the discharge frequency of the plasma ball mill.
And S2, heating the pre-activated mixed powder to 800-900 ℃, and reacting to obtain the zinc titanate powder.
In specific implementation, the reaction of step S2 may be performed in a muffle furnace, and the specific parameters are as follows: the heating rate is 10-20 ℃/min, the heating temperature is 800-900 ℃ and the heat preservation time is 2-4h.
And S3, adding deionized water and a wetting dispersant into the zinc orthotitanate powder prepared in the step S2, and stirring and mixing uniformly to obtain a zinc orthotitanate solution.
In specific implementation, the mass of the deionized water is 10-15 times of that of the zinc orthotitanate powder. The mass of the wetting dispersant is 0.5-2% of the mass of the zinc orthotitanate powder. The wetting dispersant is at least one of BYK-W9010, BYK-102 and BYK 2055.
The stirring adopts ultrasonic stirring, namely an ultrasonic stirrer is adopted for stirring, the stirring time is 2-4h, and the stirring speed is 1000-1500r/min.
S4, carrying out spray drying treatment on the zinc titanate solution through a spray dryer, and sieving to obtain zinc titanate powder suitable for plasma spraying; the particle size range of the zinc titanate powder suitable for plasma spraying is 30-60 mu m.
In specific implementation, the zinc orthotitanate solution is subjected to spray drying treatment (i.e. a secondary granulation process) by a spray dryer to obtain spray-dried powder. And screening the spray-dried powder within the range of 30-60 mu m by a screening mode to obtain the zinc orthotitanate powder suitable for plasma spraying.
The parameters of the spray drying process include: the diameter of a nozzle of the spray dryer is 1-2mm, the outlet temperature of the spray dryer is 120-150 ℃, and the peristaltic speed of the spray dryer is 20-40ml/min.
The embodiment of the invention provides zinc orthotitanate powder suitable for plasma spraying, which is prepared by the method in any one of the embodiments.
The embodiment of the invention provides application of the zinc orthotitanate powder suitable for plasma spraying in preparation of a thermal control coating.
Based on the above technical solutions, the present invention provides the following specific examples 1 to 3.
Example 1
The specific preparation method of the zinc titanate powder suitable for plasma spraying provided by the embodiment comprises the following steps:
1) Weighing zinc oxide powder and titanium dioxide powder according to a molar ratio of 2.10 to 1, wherein the zinc oxide powder has a particle size of 0.4 mu m and a purity of more than 99.99%, and the titanium dioxide powder has a particle size of 0.8 mu m and a rutile phase and a purity of more than 99.99%.
2) Uniformly mixing the zinc oxide powder and titanium dioxide powder, and carrying out plasma ball milling in an inert atmosphere to obtain preactivated mixed powder, wherein the ball milling parameters are as follows: the motor rotation speed is 650 r/min, the discharge voltage is 6kV, the discharge frequency is 20kHz, the ball milling time is 0.75h, and the ball-to-material ratio is 8.
3) And (3) putting the pre-activated powder into a muffle furnace, heating to 850 ℃ at room temperature, preserving the heat for 3h, and primarily preparing the zinc titanate powder at the heating rate of 15 ℃/min.
4) Weighing deionized water according to 13 times of the mass of the zinc orthotitanate powder prepared in the step 3), and weighing BYK-W9010 wetting dispersant according to 1% of the mass of the zinc orthotitanate powder. Uniformly mixing zinc titanate powder, deionized water and a wetting dispersant, and ultrasonically stirring for 3 hours at a stirring speed of 1200 r/min to prepare a component A.
5) And (3) carrying out spray drying treatment on the component A through a spray dryer, wherein the spray drying parameters are as follows: the diameter of the nozzle is 1.5mm, the outlet temperature is 130 ℃, and the peristaltic speed is 30 ml/min. Sieving the powder after spray drying treatment, and taking the powder within the range of 30-60 mu m as the zinc titanate powder suitable for plasma spraying.
Referring to fig. 1, fig. 1 is an electron microscope image of zinc orthotitanate powder suitable for plasma spraying prepared in example 1 of the present invention. The test results of the zinc titanate powder suitable for plasma spraying provided in this example are as follows:
1) Appearance: the powder is white and is uniformly distributed;
2) Particle size D50:45 mu m;
3) Sphericity: more than or equal to 95 percent;
the following data were obtained after pressing the zinc orthotitanate powder prepared in this example:
4) Solar absorptance: 0.08;
5) Hemispherical emissivity: 0.89.
example 2
The specific preparation method of the zinc titanate powder suitable for plasma spraying provided by the embodiment comprises the following steps:
1) Weighing zinc oxide powder and titanium dioxide powder according to a molar ratio of 2.05.
2) Uniformly mixing the zinc oxide powder and titanium dioxide powder, and carrying out plasma ball milling in an inert atmosphere to obtain preactivated mixed powder, wherein the ball milling parameters are as follows: the rotating speed of a motor is 500r/min, the discharge voltage is 4kV, the discharge frequency is 15kHz, the ball milling time is 0.5h, and the ball-to-material ratio is 5.
3) And (3) putting the pre-activated powder into a muffle furnace, heating to 800 ℃ at room temperature, preserving the heat for 2 hours, and primarily preparing the zinc titanate powder at the heating rate of 10 ℃/min.
4) Weighing deionized water according to 10 times of the mass of the zinc orthotitanate powder prepared in the step 3), and weighing BYK-102 wetting dispersant according to 0.5% of the mass of the zinc orthotitanate powder. Uniformly mixing zinc titanate powder, deionized water and a wetting dispersant, and ultrasonically stirring for 2 hours at a stirring speed of 1000 r/min to prepare the component A.
5) And (3) carrying out spray drying treatment on the component A through a spray dryer, wherein the spray drying parameters are as follows: the diameter of the nozzle is 1mm, the outlet temperature is 120 ℃, and the peristaltic speed is 20 ml/min. Sieving the powder after spray drying to obtain powder of 30-60 microns, namely the zinc titanate powder suitable for plasma spraying.
The test results of the zinc titanate powder suitable for plasma spraying provided in this example are as follows:
1) Appearance: the powder is white and is uniformly distributed;
2) Particle diameter D50:40 μm;
3) Sphericity: more than or equal to 92 percent;
the zinc orthotitanate powder prepared in this example was pressed into sheets and the following data were obtained:
4) Solar absorption ratio: 0.07;
5) Hemispherical emissivity: 0.88.
example 3
The specific preparation method of the zinc titanate powder suitable for plasma spraying provided by the embodiment comprises the following steps:
1) Weighing zinc oxide powder and titanium dioxide powder according to a molar ratio of 2.15.
2) Uniformly mixing the zinc oxide powder and titanium dioxide powder, and carrying out plasma ball milling in an inert atmosphere to obtain preactivated mixed powder, wherein the ball milling parameters are as follows: the rotating speed of a motor is 800r/min, the discharge voltage is 8kV, the discharge frequency is 25kHz, the ball milling time is 1h, and the ball-material ratio is 10.
3) And (3) putting the pre-activated powder into a muffle furnace, heating to 900 ℃ at room temperature, preserving the heat for 4 hours, and primarily preparing the zinc titanate powder at the heating rate of 20 ℃/min.
4) Weighing deionized water 15 times the mass of the zinc orthotitanate powder prepared in the step 3), and weighing BYK2055 wetting dispersant 2% of the mass of the zinc orthotitanate powder. Uniformly mixing zinc titanate powder, deionized water and a wetting dispersant, and ultrasonically stirring for 4 hours at a stirring speed of 1500r/min to prepare a component A;
5) And (3) carrying out spray drying treatment on the component A through a spray dryer, wherein the spray drying parameters are as follows: the diameter of the nozzle is 2mm, the outlet temperature is 150 ℃, and the peristaltic speed is 40ml/min. Sieving the powder after spray drying to obtain powder of 30-60 microns, namely the zinc titanate powder suitable for plasma spraying.
The test results of the zinc orthotitanate powder suitable for plasma spraying provided in this example are as follows:
1) Appearance: the powder is white and is uniformly distributed;
2) Particle size D50:50 μm;
3) Sphericity: more than or equal to 90 percent;
the following data were obtained after pressing the zinc orthotitanate powder prepared in this example:
4) Solar absorption ratio: 0.09;
5) Hemispherical emissivity: 0.90.
comparative example 1
The invention provides a preparation method of zinc titanate powder without secondary granulation, which comprises the following steps:
1) Weighing zinc oxide powder and titanium dioxide powder according to a molar ratio of 2.10 to 1, wherein the zinc oxide powder has a particle size of 0.4 mu m and a purity of more than 99.99%, and the titanium dioxide powder has a particle size of 0.8 mu m and a rutile phase and a purity of more than 99.99%.
2) Uniformly mixing the zinc oxide powder and titanium dioxide powder, and carrying out plasma ball milling in an inert atmosphere to obtain preactivated mixed powder, wherein the ball milling parameters are as follows: the motor rotation speed is 650 r/min, the discharge voltage is 6kV, the discharge frequency is 20kHz, the ball milling time is 0.75h, and the ball-to-material ratio is 8.
3) And (3) putting the preactivated powder into a muffle furnace, heating to 850 ℃ at room temperature, preserving the heat for 3 hours, and obtaining the zinc orthotitanate powder at the heating rate of 15 ℃/min.
Referring to FIG. 2, FIG. 2 is an electron micrograph of the zinc orthotitanate powder prepared in comparative example 1 according to the present invention. The zinc orthotitanate powder test results are as follows:
1) Appearance: the powder is white and is uniformly distributed;
2) Particle size D50:15 μm;
3) Sphericity: 40 percent;
the zinc orthotitanate powder prepared in this example was pressed into sheets and the following data were obtained:
4) Solar absorptance: 0.14;
5) Hemispherical emissivity: 0.90.
in the above embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the description of the specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above should not be understood to necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by one skilled in the art.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, while the invention has been described with respect to the specific embodiments, it will be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
While the invention has been described with reference to specific embodiments, the scope of the invention is not limited thereto, and various equivalent modifications and substitutions may be easily made by those skilled in the art within the technical scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A preparation method of zinc titanate powder suitable for plasma spraying is characterized by comprising the following steps:
s1, uniformly mixing zinc oxide powder and titanium dioxide powder according to a molar ratio of 2.05-2.15;
s2, heating the pre-activated mixed powder to 800-900 ℃, and reacting to obtain zinc titanate powder;
s3, adding deionized water and a wetting dispersant into the zinc orthotitanate powder prepared in the step S2, and uniformly stirring and mixing to obtain a zinc orthotitanate solution;
s4, carrying out spray drying treatment on the zinc titanate solution through a spray dryer, and sieving to obtain zinc titanate powder suitable for plasma spraying; the particle size range of the zinc titanate powder suitable for plasma spraying is 30-60 mu m.
2. The method according to claim 1, wherein the zinc oxide powder has a particle size of 0.3-0.5 μm and a purity of greater than 99.99%.
3. The method of claim 1, wherein the titanium dioxide powder has a particle size of 0.5-1 μm, the titanium dioxide powder is in the rutile phase, and the purity of the titanium dioxide powder is greater than 99.99%.
4. The method of claim 1, wherein the plasma spheronization treatment is performed under an inert atmosphere; the parameters of the plasma ball milling treatment comprise: the rotating speed of the motor is 500-800r/min, the discharge voltage is 4-8kV, the discharge frequency is 15-25kHz, the ball milling time is 0.5-1h, and the ball-material ratio is 5-10.
5. The method according to claim 1, wherein in step S2, the holding time is 2-4h and the temperature rise rate is 10-20 ℃/min.
6. The method according to claim 1, wherein in step S3, the mass of the deionized water is 10 to 15 times that of the zinc orthotitanate powder, and the mass of the wetting dispersant is 0.5 to 2% of that of the zinc orthotitanate powder; the wetting dispersant is at least one of BYK-W9010, BYK-102 and BYK 2055.
7. The method according to claim 1, wherein in step S3, ultrasonic stirring is used for stirring at a stirring speed of 1000-1500r/min for 2-4h.
8. The method of claim 1, wherein the parameters of the spray drying process comprise: the diameter of the nozzle of the spray dryer is 1-2mm, the outlet temperature of the spray dryer is 120-150 ℃, and the peristaltic speed of the spray dryer is 20-40ml/min.
9. Zinc orthotitanate powder suitable for plasma spraying, characterized in that it is prepared by the process according to any one of claims 1 to 8.
10. Use of zinc orthotitanate powder suitable for plasma spraying according to claim 9 for the preparation of a thermal control coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211517720.6A CN115893480A (en) | 2022-11-29 | 2022-11-29 | Zinc titanate powder suitable for plasma spraying, preparation method and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211517720.6A CN115893480A (en) | 2022-11-29 | 2022-11-29 | Zinc titanate powder suitable for plasma spraying, preparation method and application |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115893480A true CN115893480A (en) | 2023-04-04 |
Family
ID=86493072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211517720.6A Pending CN115893480A (en) | 2022-11-29 | 2022-11-29 | Zinc titanate powder suitable for plasma spraying, preparation method and application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115893480A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5714431A (en) * | 1994-10-19 | 1998-02-03 | Research Triangle Institute | Zinc titanate sorbents |
| KR19980069339A (en) * | 1997-02-27 | 1998-10-26 | 성재갑 | New Ultraviolet Reflective Zinc Magnesium Titanate Inorganic Pigment and Composition Containing It |
| US20110070428A1 (en) * | 2009-09-18 | 2011-03-24 | General Electric Company | Composition and method for a thermal coating system |
-
2022
- 2022-11-29 CN CN202211517720.6A patent/CN115893480A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5714431A (en) * | 1994-10-19 | 1998-02-03 | Research Triangle Institute | Zinc titanate sorbents |
| KR19980069339A (en) * | 1997-02-27 | 1998-10-26 | 성재갑 | New Ultraviolet Reflective Zinc Magnesium Titanate Inorganic Pigment and Composition Containing It |
| US20110070428A1 (en) * | 2009-09-18 | 2011-03-24 | General Electric Company | Composition and method for a thermal coating system |
Non-Patent Citations (2)
| Title |
|---|
| 冯汉坤等: "ZnO-TiO2体系的固相合成与表征", 有色金属科学与工程, vol. 07, no. 04, pages 22 - 26 * |
| 杨绍利主编: "《钒钛磁铁矿综合利用技术手册》", vol. 1, 冶金工业出版社, pages: 1207 - 1208 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2233876C (en) | Coating method of amorphous type titanium peroxide | |
| CN110330333B (en) | Method for preparing nano yttrium-stabilized zirconia composite powder | |
| CN109440051A (en) | A kind of alumina ceramic coating and preparation method thereof | |
| CN102786088A (en) | Preparation method of nano titanium dioxide compound | |
| CN108569895B (en) | Preparation method of aluminum oxide ceramic for new energy electric vehicle | |
| CN112831747A (en) | Thermal protection coating and preparation method thereof | |
| CN109355613A (en) | A kind of high temperature high emissivity hafnium oxide base infrared radiating coating and preparation method thereof | |
| JP2023514855A (en) | Cobalt-free composite positive electrode material and manufacturing method thereof | |
| CN109399711A (en) | A kind of preparation method of rutile phase hypovanadic oxide nano-powder | |
| CN112209440A (en) | Process for preparing M-phase vanadium dioxide nano powder | |
| CN115893480A (en) | Zinc titanate powder suitable for plasma spraying, preparation method and application | |
| CN113292324B (en) | Preparation method of solid spherical AT13 spray feed without screening | |
| CN108212186A (en) | A kind of method that room temperature solid-state reaction prepares bismuth oxide-bismuthyl carbonate nano-complex | |
| CN111087235A (en) | Method for preparing YAG transparent ceramic by adopting yttrium/auxiliary agent/aluminum triple core-shell structure powder | |
| CN111634950B (en) | Preparation method of perovskite type high-emissivity spherical agglomerated powder | |
| CN110666167A (en) | Selective laser sintering 3D printing shielding material and preparation method thereof, shielding piece and manufacturing method thereof | |
| CN115650635B (en) | High-performance rare earth nano paint prepared from polishing powder waste and preparation method thereof | |
| CN108408754B (en) | A kind of resistant to plasma being conducive to color after control sprays corrodes the preparation method of granulation yttrium oxide used for hot spraying | |
| CN108808020B (en) | Preparation method of carbon nano tube-nickel cobalt silicate catalyst | |
| CN103342383B (en) | A kind of preparation method of microwave dielectric ceramic materials | |
| CN102834927A (en) | Paste composition for solar cell, method for producing same, and solar cell | |
| CN116237214A (en) | Al-Y-Cr-Fe-Er-O high-entropy composite oxide hydrogen-resistant coating and preparation method thereof | |
| CN110156456A (en) | A kind of titanium monoxide semiconductive ceramic and preparation method thereof | |
| CN115433007A (en) | Solar spectrum wide-frequency absorption material and preparation method thereof | |
| CN109705674B (en) | Polyvinyl butyral resin-based laser protective coating and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |