CN104261809A - Processing method of electronic ceramic tape-casting slurry - Google Patents
Processing method of electronic ceramic tape-casting slurry Download PDFInfo
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- CN104261809A CN104261809A CN201410475700.6A CN201410475700A CN104261809A CN 104261809 A CN104261809 A CN 104261809A CN 201410475700 A CN201410475700 A CN 201410475700A CN 104261809 A CN104261809 A CN 104261809A
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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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
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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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/632—Organic additives
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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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/632—Organic additives
- C04B35/634—Polymers
- C04B35/63404—Polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B35/63416—Polyvinylalcohols [PVA]; Polyvinylacetates
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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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
Abstract
The invention relates to a processing method of electronic ceramic tape-casting slurry. The processing method comprises the following steps: adding a main solvent, a plasticizer, a surface lubricating agent and a bonding agent into a ball milling tank for ball milling for 2-4h, further adding electronic ceramic powder, and continuously performing ball milling for 26-32h. In the first aspect, the ball milling time is greatly reduced, and the preparation efficiency of the electronic ceramic tape-casting slurry is improved; in the second aspect, by adopting the preparation process which performs ball milling twice, the plasticizer can be fully inserted into double bonds of the bonding agent, and the opening of the double bonds of the bonding agent is better; the surface lubricating agent is also uniformly distributed in a solvent system, so that when powder is added subsequently, the powder can be effectively infiltrated and protected; in the third aspect, according to the tape-casting slurry prepared by the method provided by the invention, aggregation can be avoided during tape-casting molding of an electronic ceramic green body, and after firing of the electronic ceramic green body, the product has uniform and clear lines and a good microstructure.
Description
Technical field
The present invention relates to electronic ceramics processing technique field, particularly a kind of working method of electronic ceramics casting slurry.
Background technology
The pottery of electricity, magnetic property can be utilized in the electronics industry, be called electronic ceramics.Electronic ceramics finally obtains the pottery with New function by the control of effects on surface, crystal boundary and dimensional structure.Can widespread use in the energy, household electrical appliance, automobile etc.
At present, when electronic ceramics green compact make, the method for flow casting molding is normally adopted to make.Like this, the configuration of casting slurry is very crucial, and existing electronic ceramics casting slurry configuration technique main solvent, softening agent, surface lubricant, caking agent and powder is added in ball grinder successively by formula to carry out ball milling, and Ball-milling Time is generally 56 ~ 72 hours.
Realizing in process of the present invention, contriver finds that prior art at least exists following problem: existing casting slurry blending process length consuming time, effect is bad.Main solvent, softening agent, surface lubricant, caking agent and powder add ball milling simultaneously, and its softening agent can not fully insert in the double bond of caking agent, have impact on suspension effect; And surface lubricant effectively can not be invaded ravine to keep powder sticky, split is reunited serious, therefore it is bad to burn the product microstructure.
Summary of the invention
In order to solve the problem of prior art, the invention provides a kind of working method of electronic ceramics casting slurry, described working method comprises the following steps:
Step one), successively main solvent, softening agent, surface lubricant and caking agent to be joined in ball grinder ball milling 2 ~ 4 hours according to preset blending ratio;
Step 2), then in ball grinder, add the electronic ceramics powder of reservation ratio, continue ball milling 26 ~ 32 hours, obtain electronic ceramics casting slurry;
Described electronic ceramics powder is Al
2o
3powder, described electronic ceramics powder accounts for 65% ~ 75% in described electronic ceramics casting slurry.
Further, described main solvent is one or more the mixture in toluene, dimethylbenzene, butanone, pimelinketone and trieline, and described main solvent accounts for 15% ~ 25% in described electronic ceramics casting slurry.
Further, described softening agent is DBP, and described softening agent accounts for 1% ~ 5% in described electronic ceramics casting slurry.
Further, described surface lubricant is the mixture of Semen Maydis oil, Viscotrol C or Semen Maydis oil and Viscotrol C, and described surface lubricant accounts for 0.5% ~ 1.5% in described electronic ceramics casting slurry.
Further, described caking agent is PVA, and described caking agent accounts for 2% ~ 6% in described electronic ceramics casting slurry.Wherein, the Chinese name of PVA is polyvinyl alcohol.
Further, in step one) and step 2) in ball milling time, the temperature controlled in ball grinder is 30 DEG C ~ 35 DEG C.
In the present invention, described Al
2o
3powder; Aluminum oxide, also known as aluminium sesquioxide, formula weight 102, is commonly referred to " alumina ", is a kind of white-amorphous meal, water insoluble, is commonly called as alumina another name: aluminium sesquioxide, corundum, alumina, alumina.Chemical formula: Al
2o
3.
Described main solvent is toluene, dimethylbenzene, butanone, pimelinketone and trieline;
Toluene: be a kind of colourless, with the volatile liquid of special aromatising flavour.Toluene is a member of aromatic hydrocarbons, its a lot of character and benzene are very alike, usually substituting has the benzene of suitable toxicity to use as organic solvent, or a kind of conventional industrial chemicals, can be used for manufacturing explosive, agricultural chemicals, phenylformic acid, dyestuff, synthetic resins and terylene etc.
Dimethylbenzene: English name is o-Xylene, be component important in dimethylbenzene Isomers mixture, o-Xylol does not separate from xylol, and is isomerized to p-Xylol, and o-Xylol is the raw material of Tetra hydro Phthalic anhydride processed.
Butanone: Chinese another name: butanone; Methyl ethyl ketone; Methylethylketone; MEK; Methylacetone; Ethyl methyl ketone; Ethyl methyl ketone; 2-oxo-butanes; Ethyl methyl ketone.English name: 2-Butanone.Main be used as solvent, as lubricating oil dewaxing, coatings industry and various kinds of resin solvent, the extraction process of vegetables oil and the azeotropic distillation for the treatment of process, its advantage is that solvability is strong, and volatility is lower than acetone, belongs to mid-boiling point ketones solvent.What butanone still prepared medicine, dyestuff, washing composition, spices, antioxidant and some catalyzer is intermediate, synthesize anti-decorticating agent methyl ethyl ketone oxime, polymerizing catalyst methyl-ethyl-ketone peroxide, stopping agent methylparafynol etc., be used as the photographic developer after IC etching in the electronics industry.
Pimelinketone: the cyclic ketones being six carbon, is colourless oil liquid under room temperature, has the smell of similar spearmint oil and acetone, be long placed in its colour changed into yellow.It is slightly soluble in water (5-10g/100ml), can with most of immiscible organic solvent.Pimelinketone is industrially used as the triggering agent of solvent and some oxidizing reactions, also for obtaining adipic acid, cyclohexanone resin, hexanolactam and nylon 6.
Trieline: be industrial common solvent.It is colourless, toxic, transparent, easy flowing, do not burn, volatile, there is the liquid of aromatising flavour, have anesthetic action to nerve.Pure trieline decomposes slowly.When having uviolizing trieline and oxygen mixture, accelerating trieline and decomposing.Trieline is mainly used as the dry cleaning composition of metal degreasing and wool and fabric.The solvent of resin, pitch, coal tar, cellulose acetate, soluble cotton, rubber and coating etc.
Softening agent: DBP---dibutyl phthalate (DBP); Quality index GB11405-2006; Premium grads, first grade, seconds.CAS?No.84-74-2。Main application: be mainly used in PVC and make softening agent, also for digesting cotton synthetic rubber, cellulose acetate, makees tenderizer in the synthetic materialss such as leather chemical industry paint.Physico-chemical property: colourless transparent liquid, has aromatic odour, proportion 1.045, refractive index 1.49, boiling point 340 degree, and cementation point-35 is spent, and flash-point 171 degree, 202 degree, point of ignition, viscosity 16.3 centipoise, water solubility 202 degree, dissolves most of organic solvent and river rising in Ningxia and flowing into central Shaanxi class.
Caking agent is PVA (Professional Video Assistant)---polyvinyl alcohol, organic compound.Polyvinyl alcohol (being called for short PVA) outward appearance is white powder, is a kind of purposes high molecular weight water soluble polymer quite widely, and performance is between plastics and rubber, and its purposes can be divided into fiber and the large purposes of non-fiber two.Due to the water tolerance that PVA has unique strong adherence, epithelium snappiness, smoothness, oil-proofness, solvent resistance, protective colloid, gas barrier performance, wear resistance and has through special processing; therefore except making fibrous material; also by a large amount of for the production of products such as coating, tackiness agent, paper product machining agent, emulsifying agent, dispersion agent, films, range of application is throughout industries such as weaving, food, medicine, building, wood working, papermaking, printing, agricultural, iron and steel, macromolecule chemical industries.
Surface lubricant is Semen Maydis oil, Viscotrol C.Semen Maydis oil: the fatty oil obtained through squeezing for the zeistic seed of grass.Viscotrol C: the fatty oil obtained through squeezing for castor seeds, can lubricating oil processed, mordant.
The beneficial effect that the technical scheme that the embodiment of the present invention provides is brought is:
By adding in main solvent, softening agent, surface lubricant and caking agent to ball grinder ball milling 2 ~ 4 hours, then adding electronic ceramics powder, continuing ball milling 26 ~ 32 hours.On the one hand, greatly save Ball-milling Time, improve the confecting efficiency of electronic ceramics casting slurry; Second aspect, the blending process of the present invention's ball milling at twice, softening agent is inserted in the double bond of caking agent fully, and the double bond of caking agent is opened better; And surface lubricant is also evenly distributed in solvent system, when making to add powder later, effectively can invade profit protection powder; The third aspect, the casting slurry of the present invention's preparation, do not occur when electronic ceramics green compact flow casting molding reuniting, after electronic ceramics green compact bake, the lines of product is evenly clear, and microstructure is good.
Embodiment
For making order of the present invention ground, technical scheme and a little clearly, below embodiment of the present invention is described further in detail.
Embodiment one
Present embodiments provide a kind of working method of electronic ceramics casting slurry, this working method comprises the following steps:
S1, to join in ball grinder ball milling 2 ~ 4 hours successively according to preset blending ratio by main solvent, softening agent, surface lubricant and caking agent;
S2, then the electronic ceramics powder adding reservation ratio in ball grinder, continue ball milling 26 ~ 32 hours, obtain electronic ceramics casting slurry;
In step S1, main solvent one or more the mixture that to be main solvent be in toluene, dimethylbenzene, butanone, pimelinketone and trieline, main solvent accounts for 15% ~ 25% in described electronic ceramics casting slurry.
Softening agent is DBP, and described softening agent accounts for 1% ~ 5% in described electronic ceramics casting slurry.
Surface lubricant is the mixture of Semen Maydis oil, Viscotrol C or Semen Maydis oil and Viscotrol C, and surface lubricant accounts for 0.5% ~ 1.5% in described electronic ceramics casting slurry.
Caking agent is PVA, and caking agent accounts for 2% ~ 6% in electronic ceramics casting slurry.
In step S2, electronic ceramics powder is Al2O3 powder, and electronic ceramics powder accounts for 65% ~ 75% in electronic ceramics casting slurry.
In step S1 and step S2 during ball milling, the temperature controlled in ball grinder is 30 DEG C ~ 35 DEG C.
Embodiment two
Present embodiments provide a kind of working method of electronic ceramics casting slurry, this working method comprises the following steps:
S1, to join in ball grinder ball milling 3 hours successively according to preset blending ratio by main solvent, softening agent, surface lubricant and caking agent.Wherein, main solvent is toluene, and toluene accounts for 20% in electronic ceramics casting slurry; Softening agent is that DBP, DBP account for 3% in electronic ceramics casting slurry; Surface lubricant is Semen Maydis oil, and Semen Maydis oil accounts for 0.8% in electronic ceramics casting slurry; Caking agent is that PVA, PVA account for 4% in electronic ceramics casting slurry.
S2, then the electronic ceramics powder adding predetermined proportion in ball grinder, continue ball milling 30 hours, obtain electronic ceramics casting slurry.Wherein, electronic ceramics powder is Al
2o
3powder, Al
2o
3powder accounts for 72.2% in electronic ceramics casting slurry.
Preferably, in step S1 and step S2 during ball milling, the temperature controlled in ball grinder is 30 DEG C.
Embodiment three
Present embodiments provide a kind of working method of electronic ceramics casting slurry, this working method comprises the following steps:
S1, to join in ball grinder ball milling 3.5 hours successively according to preset blending ratio by main solvent, softening agent, surface lubricant and caking agent.Wherein, main solvent is dimethylbenzene, and dimethylbenzene accounts for 15% in electronic ceramics casting slurry; Softening agent is that DBP, DBP account for 5% in electronic ceramics casting slurry; Surface lubricant is Viscotrol C, and Viscotrol C accounts for 1.5% in electronic ceramics casting slurry; Caking agent is that PVA, PVA account for 3.5% in electronic ceramics casting slurry.
S2, then the electronic ceramics powder adding predetermined proportion in ball grinder, continue ball milling 31 hours, obtain electronic ceramics casting slurry.Wherein, electronic ceramics powder is Al
2o
3powder, Al
2o
3powder accounts for 75% in electronic ceramics casting slurry.
Preferably, in step S1 and step S2 during ball milling, the temperature controlled in ball grinder is 32 DEG C.
Embodiment four
Present embodiments provide a kind of working method of electronic ceramics casting slurry, this working method comprises the following steps:
S1, to join in ball grinder ball milling 4 hours successively according to preset blending ratio by main solvent, softening agent, surface lubricant and caking agent.Wherein, main solvent is the mixture of butanone and pimelinketone, and the mixture of butanone and pimelinketone accounts for 25% in electronic ceramics casting slurry; Softening agent is DBP, in electronic ceramics casting slurry, account for 3%; Surface lubricant is Semen Maydis oil, and Semen Maydis oil accounts for 1% in electronic ceramics casting slurry; Caking agent is that PVA, PVA account for 6% in electronic ceramics casting slurry.
S2, then the electronic ceramics powder adding predetermined proportion in ball grinder, continue ball milling 32 hours, obtain electronic ceramics casting slurry.Wherein, electronic ceramics powder is Al
2o
3powder, Al
2o
3powder accounts for 65% in electronic ceramics casting slurry.
Preferably, in step S1 and step S2 during ball milling, the temperature controlled in ball grinder is 35 DEG C.
Embodiment five
Present embodiments provide a kind of working method of electronic ceramics casting slurry, this working method comprises the following steps:
S1, to join in ball grinder ball milling 2.5 hours successively according to preset blending ratio by main solvent, softening agent, surface lubricant and caking agent.Wherein, main solvent is trieline, and trieline accounts for 22.5% in electronic ceramics casting slurry; Softening agent is that DBP accounts for 2% in electronic ceramics casting slurry; Surface lubricant is Semen Maydis oil, and Semen Maydis oil accounts for 0.5% in electronic ceramics casting slurry; Caking agent is that PVA, PVA account for 5% in electronic ceramics casting slurry.
S2, then the electronic ceramics powder adding predetermined proportion in ball grinder, continue ball milling 30 hours, obtain electronic ceramics casting slurry.Wherein, electronic ceramics powder is Al
2o
3powder, Al
2o
3powder accounts for 70% in electronic ceramics casting slurry.
Preferably, in step S1 and step S2 during ball milling, the temperature controlled in ball grinder is 32.5 DEG C.
Embodiment six
Present embodiments provide a kind of working method of electronic ceramics casting slurry, this working method comprises the following steps:
S1, to join in ball grinder ball milling 2 hours successively according to preset blending ratio by main solvent, softening agent, surface lubricant and caking agent.Wherein, main solvent is toluene, and toluene accounts for 17.5% in electronic ceramics casting slurry; Softening agent is that DBP, DBP account for 4% in electronic ceramics casting slurry; Surface lubricant is Semen Maydis oil, and Semen Maydis oil accounts for 1.2% in electronic ceramics casting slurry; Caking agent is that PVA, PVA account for 5.5% in electronic ceramics casting slurry.
S2, then the electronic ceramics powder adding predetermined proportion in ball grinder, continue ball milling 30 hours, obtain electronic ceramics casting slurry.Wherein, electronic ceramics powder is Al
2o
3powder, Al
2o
3powder accounts for 71.8% in electronic ceramics casting slurry.
Preferably, in step S1 and step S2 during ball milling, the temperature controlled in ball grinder is 34 DEG C.
Embodiment seven
Present embodiments provide a kind of working method of electronic ceramics casting slurry, this working method comprises the following steps:
S1, to join in ball grinder ball milling 3 hours successively according to preset blending ratio by main solvent, softening agent, surface lubricant and caking agent.Wherein, main solvent is the mixture of toluene and dimethylbenzene, and the mixture of toluene and dimethylbenzene accounts for 21.1% in electronic ceramics casting slurry; Softening agent is that DBP, DBP account for 1% in electronic ceramics casting slurry; Surface lubricant is Viscotrol C, and Viscotrol C accounts for 0.9% in electronic ceramics casting slurry; Caking agent is that PVA, PVA account for 2% in electronic ceramics casting slurry.
S2, then the electronic ceramics powder adding predetermined proportion in ball grinder, continue ball milling 30 hours, obtain electronic ceramics casting slurry.Wherein, electronic ceramics powder is Al
2o
3powder, Al
2o
3powder accounts for 75% in electronic ceramics casting slurry.
Preferably, in step S1 and step S2 during ball milling, the temperature controlled in ball grinder is 35 DEG C.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. a working method for electronic ceramics casting slurry, is characterized in that, described working method comprises the following steps:
Step one), successively main solvent, softening agent, surface lubricant and caking agent are joined in ball grinder according to preset blending ratio, ball milling 2 ~ 4 hours;
Step 2), then in ball grinder, add the electronic ceramics powder of reservation ratio, continue ball milling 26 ~ 32 hours, obtain electronic ceramics casting slurry;
Described electronic ceramics powder is Al
2o
3powder, described electronic ceramics powder accounts for 65% ~ 75% in described electronic ceramics casting slurry.
2. the working method of electronic ceramics casting slurry according to claim 1, it is characterized in that, described main solvent is one or more the mixture in toluene, dimethylbenzene, butanone, pimelinketone and trieline, and main solvent accounts for 15% ~ 25% in described electronic ceramics casting slurry.
3. the working method of electronic ceramics casting slurry according to claim 1, it is characterized in that, described softening agent is DBP, and softening agent accounts for 1% ~ 5% in described electronic ceramics casting slurry.
4. the working method of a kind of electronic ceramics casting slurry according to claim 1, it is characterized in that, described surface lubricant is the mixture of Semen Maydis oil, Viscotrol C or Semen Maydis oil and Viscotrol C, and described surface lubricant accounts for 0.5% ~ 1.5% in described electronic ceramics casting slurry.
5. the working method of electronic ceramics casting slurry according to claim 1, it is characterized in that, described caking agent is PVA, and caking agent accounts for 2% ~ 6% in described electronic ceramics casting slurry.
6. the working method of electronic ceramics casting slurry according to any one of claim 1 to 5, is characterized in that, in step one) and step 2) in ball milling time, the temperature controlled in ball grinder is 30 DEG C ~ 35 DEG C.
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| CN107235715A (en) * | 2017-08-01 | 2017-10-10 | 郑州联冠科技有限公司 | LED whiteware pedestal casting slurries |
| CN107235714A (en) * | 2017-08-01 | 2017-10-10 | 郑州联冠科技有限公司 | Electronic ceramics casting slurry configuration technique |
| CN107805074A (en) * | 2017-11-13 | 2018-03-16 | 戴承萍 | A kind of processing method of electronic ceramics casting slurry |
| CN111792932A (en) * | 2020-03-30 | 2020-10-20 | 镇江锆源传感科技有限公司 | Preparation method of zirconia and alumina casting green body co-fired sintered sheet layer |
| CN114702306A (en) * | 2022-04-22 | 2022-07-05 | 湖南省新化县鑫星电子陶瓷有限责任公司 | Preparation method of 95 alumina ceramic substrate and product thereof |
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Application publication date: 20150107 |