阅读说明：本技术 一种氧化锆和氧化铝流延生坯共烧结片层的制备方法 (Preparation method of zirconia and alumina casting green body co-fired sintered sheet layer ) 是由 谢光远 邱电荣 王晓宁 张宇明 孙宏伟 于 2020-03-30 设计创作，主要内容包括：本发明公开一种氧化锆和氧化铝流延生坯共烧结片层的制备方法,本发明选用顽火辉石(主要成分Mg<Sub>2</Sub>[Si<Sub>2</Sub>O<Sub>6</Sub>]Fe<Sub>2</Sub>[Si<Sub>2</Sub>O<Sub>6</Sub>]),其热膨胀系数为13.5ppm/k,其添加量42%,相应的纳米Al<Sub>2</Sub>O<Sub>3</Sub>的添加量为58%,可以和氧化锆的热膨胀系数一致,同时顽火辉石的绝缘性、烧结特性、强度和相容性都能匹配。本发明解决目前共烧结导致绝缘性下降,同时烧结性能、强度和相容性不匹配的问题。(The invention discloses a preparation method of a zirconia and alumina casting green body co-fired sintered layer, which selects enstatite (a main component Mg) 2 [Si 2 O 6 ]Fe 2 [Si 2 O 6 ]) The thermal expansion coefficient is 13.5ppm/k, the addition amount is 42 percent, and the corresponding nano Al 2 O 3 The amount of (B) is 58%, which can be matched with the thermal expansion coefficient of zirconia, and the insulation property, sintering property, strength and compatibility of enstatite can be matched. The invention solves the problem of insulation reduction and sintering property caused by the prior co-sinteringEnergy, strength and compatibility mismatch.)

1. A preparation method of a zirconia and alumina casting green body co-sintered sheet layer is characterized in that the casting green body co-sintered sheet layer is formed by casting and co-sintering a zirconia casting and alumina compounding system, and is characterized in that: the flow casting of the zirconia is prepared by mixing and ball-milling zirconia powder, a solvent, a binder, a dispersant, a plasticizer and a lubricant according to a certain proportion; the alumina compound system is prepared by mixing and ball milling alumina compound powder, a solvent, a binder, a dispersant, a plasticizer and a lubricant according to a certain proportion.

2. The method of claim 1, wherein the method comprises the steps of: the raw material of the zirconia tape casting and the components thereof are calculated according to the parts by weight;

zirconia powder: 30-50 parts;

solvent: 35-65 parts;

adhesive: 8 parts of a mixture;

dispersing agent: 1 part;

plasticizer: 4 parts of a mixture;

lubricant: and 3 parts.

3. A method of making a cast zirconia and alumina green cofired layer as claimed in claim 2, wherein: the binder is polyvinyl butyral resin.

4. A method of making a cast zirconia and alumina green cofired layer as claimed in claim 2, wherein: the plasticizer is dibutyl phthalate.

5. A method of making a cast zirconia and alumina green cofired layer as claimed in claim 2, wherein: the lubricant is polyethylene glycol.

6. The method of claim 1, wherein the method comprises the steps of: the raw material of the zirconia tape casting and the components thereof are calculated according to the parts by weight;

compounding powder: 30-50 parts;

solvent: 35-65 parts;

dispersing agent: 1 part;

adhesive: 8 parts of a mixture;

dispersing agent: 1 part;

plasticizer: 4 parts of a mixture;

lubricant: and 3 parts.

7. The method of claim 6, wherein the method comprises the steps of: the aluminum oxide accounts for 58% of the compound powder, and the enstatite accounts for 42%.

8. The method of claim 6, wherein the method comprises the steps of: the adhesive is polyvinyl butyral resin, the plasticizer is dibutyl phthalate, and the lubricant is polyethylene glycol.

Technical Field

The invention relates to the technical field of casting green body co-sintering layers, in particular to a preparation method of a casting green body co-sintering layer of zirconia and alumina.

Background

At present, the chip oxygen sensor for the automobile is made of a zirconia substrate, various functional units are printed on the zirconia substrate and then are overlapped, and the heating unit is required to be insulated from the signal unit so as to prevent the zirconia substrate from conducting electricity when the temperature is increased to cause the interference of a heating signal to an electrochemical signal. The heating unit is required to be subjected to insulation treatment, the mode that an aluminum oxide insulating layer is printed on the upper portion and the lower portion of the heating unit is generally adopted, however, the pins are arranged outside, the heating circuit is arranged inside, the heating circuit is generally connected through the through holes, the insulation treatment of the through holes is very difficult, the through holes are generally not subjected to insulation treatment at present, and the through holes are close to pin ends and far away from the head, so that the temperature is not high during working, the electric leakage is not serious, and the signal influence on the oxygen sensor is. However, under some conditions, the operating temperature of the oxygen sensor is very high, and the problem of electric leakage caused by the uninsulated via hole is serious. The invention is that a whole layer of alumina green compact is superposed on a zirconia substrate between a heating unit and a signal unit, then co-firing is realized, and the problem of electric leakage of the heating unit is fundamentally solved.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a preparation method of a zirconia and alumina casting green body co-fired sintered sheet layer, which solves the problems of insulation reduction and unmatched sintering performance, strength and compatibility caused by the prior co-sintering.

In order to achieve the purpose, the invention adopts the technical scheme that:

a preparation method of a zirconia and alumina casting green body co-sintered sheet layer is characterized in that the casting green body co-sintered sheet layer is formed by casting and co-sintering a zirconia casting and alumina compounding system, and is characterized in that: the flow casting of the zirconia is prepared by mixing and ball-milling zirconia powder, a solvent, a binder, a dispersant, a plasticizer and a lubricant according to a certain proportion; the alumina compound system is prepared by mixing and ball milling alumina compound powder, a solvent, a binder, a dispersant, a plasticizer and a lubricant according to a certain proportion.

According to the preparation method of the zirconia and alumina casting green body co-fired sintered sheet layer, the casting raw material of the zirconia and the components thereof are calculated according to the parts by weight;

zirconia powder: 30-50 parts;

solvent: 35-65 parts;

adhesive: 8 parts of a mixture;

dispersing agent: 1 part;

plasticizer: 4 parts of a mixture;

lubricant: and 3 parts.

In the preparation method of the zirconia and alumina casting green body co-sintered sheet layer, the binder is polyvinyl butyral resin.

In the preparation method of the zirconia and alumina casting green compact co-fired sintered sheet layer, the plasticizer is dibutyl phthalate.

In the preparation method of the zirconia and alumina casting green body co-sintered sheet layer, the lubricant is polyethylene glycol.

According to the preparation method of the zirconia and alumina casting green body co-fired sintered sheet layer, the casting raw material of the zirconia and the components thereof are calculated according to the parts by weight;

compounding powder: 30-50 parts;

solvent: 35-65 parts;

dispersing agent: 1 part;

adhesive: 8 parts of a mixture;

dispersing agent: 1 part;

plasticizer: 4 parts of a mixture;

lubricant: and 3 parts.

In the preparation method of the zirconia and alumina casting green body co-fired sintered sheet layer, the alumina accounts for 58% of the composite powder, and the enstatite accounts for 42%.

According to the preparation method of the zirconia and alumina casting green body co-fired sintered sheet layer, the binder is polyvinyl butyral resin, the plasticizer is dibutyl phthalate, and the lubricant is polyethylene glycol.

According to the inventionThe beneficial effects are that: the invention selects enstatite (main component Mg)₂[Si₂O₆]Fe₂[Si₂O₆]) The thermal expansion coefficient is 13.5ppm/k, the addition amount is 42 percent, and the corresponding nano Al₂O₃The amount of (B) is 58%, which can be matched with the thermal expansion coefficient of zirconia, and the insulation property, sintering property, strength and compatibility of enstatite can be matched.

Detailed Description

The described embodiments are only some, but not all embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

A preparation method of a zirconia and alumina casting green body co-sintered sheet layer is characterized in that the casting green body co-sintered sheet layer is formed by casting and co-sintering a zirconia casting and alumina compounding system, and is characterized in that: the flow casting of the zirconia is prepared by mixing and ball-milling zirconia powder, a solvent, a binder, a dispersant, a plasticizer and a lubricant according to a certain proportion; the alumina compound system is prepared by mixing and ball milling alumina compound powder, a solvent, a binder, a dispersant, a plasticizer and a lubricant according to a certain proportion.

Preferably, the raw material and the components of the zirconia tape casting are calculated according to the parts by weight;

zirconia powder: 30-50 parts;

solvent: 35-65 parts;

adhesive: 8 parts of a mixture;

dispersing agent: 1 part;

plasticizer: 4 parts of a mixture;

lubricant: and 3 parts.

Preferably, the binder is a polyvinyl butyral resin.

Preferably, the plasticizer is dibutyl phthalate.

Preferably, the lubricant is polyethylene glycol.

Preferably, the raw material and components of the zirconia tape casting are calculated according to the weight portion;

compounding powder: 30-50 parts;

solvent: 35-65 parts;

dispersing agent: 1 part;

adhesive: 8 parts of a mixture;

dispersing agent: 1 part;

plasticizer: 4 parts of a mixture;

lubricant: and 3 parts.

Preferably, the composite powder contains 58% of alumina and 42% of enstatite.

Preferably, the binder is polyvinyl butyral resin, the plasticizer is dibutyl phthalate, and the lubricant is polyethylene glycol.

In summary, the invention selects enstatite (main component Mg)₂[Si₂O₆]Fe₂[Si₂O₆]) The thermal expansion coefficient is 13.5ppm/k, the addition amount is 42 percent, and the corresponding nano Al₂O₃The additive amount of (1) is 58%, which can be consistent with the thermal expansion coefficient of zirconia, and simultaneously the insulation property, sintering property, strength and compatibility of enstatite can be matched, thus solving the problems that the insulation property is reduced and the sintering property, strength and compatibility are not matched due to the co-sintering at present.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.