阅读说明：本技术 一种复合陶瓷材料及其制备方法与应用 (Composite ceramic material and preparation method and application thereof ) 是由 刘颂辉 郑江标 易灿 于 2019-12-04 设计创作，主要内容包括：本发明提供一种复合陶瓷材料及其制备方法与应用。该复合陶瓷材料包括以重量份计的如下组分：莫来石粉60-85份,氧化锆10-35份、添加剂3-7份和造孔剂10-30份。将莫来石粉、氧化锆、添加剂和造孔剂按照上述重量份数混合均匀,将混合物分散于乙醇中,球磨,制备出流变性能优异的浆料；将上述浆料倒入模具中进行常压烧制,得到复合陶瓷材料。(The invention provides a composite ceramic material and a preparation method and application thereof. The composite ceramic material comprises the following components in parts by weight: 60-85 parts of mullite powder, 10-35 parts of zirconia, 3-7 parts of an additive and 10-30 parts of a pore-forming agent. Uniformly mixing mullite powder, zirconia, an additive and a pore-forming agent according to the weight parts, dispersing the mixture in ethanol, and performing ball milling to prepare slurry with excellent rheological property; and pouring the slurry into a mould to be fired at normal pressure to obtain the composite ceramic material.)

1. The composite ceramic material is characterized by comprising the following components in parts by weight: 60-85 parts of mullite powder, 10-35 parts of zirconia, 3-7 parts of an additive and 10-30 parts of a pore-forming agent.

2. The composite ceramic material according to claim 1, wherein the mullite powder has a purity of electrofused mullite powder having an aluminum content of greater than 70% by weight.

3. The composite ceramic material of claim 1, wherein the zirconia has a purity of at least 99%.

4. The composite ceramic material according to claim 1, wherein the additive is barium carbonate and/or magnesium oxide.

5. The composite ceramic material of claim 1, wherein the pore former is a TW-series pore former.

6. A method of preparing a composite ceramic material according to any one of claims 1 to 5, comprising the steps of:

(1) pulping: uniformly mixing mullite powder, zirconia, an additive and a pore-forming agent according to the weight parts, dispersing the mixture in ethanol, and performing ball milling to prepare slurry with excellent rheological property;

(2) and pouring the slurry into a mould to be fired at normal pressure to obtain the composite ceramic material.

7. The method according to claim 6, wherein in the step (1), the weight ratio of the mixture to ethanol is 1 (0.8-1.5).

8. The preparation method according to claim 6, wherein in the step (2), the slurry is poured into the mould and then needs to be subjected to foam discharging;

in the step (2), the firing temperature is 1600-1700 ℃, and the firing time is 2-4 h;

in the step (2), the firing is performed in an inert atmosphere.

9. Use of the composite ceramic material according to any one of claims 1 to 4 as a material for a housing of a ceramic fuse.

10. A ceramic fuse housing comprising the composite ceramic material of any one of claims 1 to 4.

Technical Field

The invention belongs to the field of ceramic materials, relates to a ceramic fuse tube material, and particularly relates to a composite ceramic material and a preparation method and application thereof.

Background

With the rapid development of electronic technology and the change of electronic equipment, 5G communication, automatic intelligent equipment, new energy electric vehicles and the like enter a rapid development stage in advance, and the development is further towards miniaturization, integration, intelligent automation and precision. The traditional ceramic fuse tube mostly adopts materials such as 95 porcelain and 75 porcelain as a shell, and the requirements of the ceramic fuse tube on miniaturization, surface mounting and performance parameter great improvement are difficult to meet due to the unicity of the materials, so that a novel composite ceramic material needs to be developed and invented to miniaturize the fuse tube on the appearance volume. The upper patch is used for realizing the on-chip switching, the performance is improved, the current is cut off, the voltage is larger, and the follow current is smaller. The anti-riot performance is safer and firmer to meet the requirement of the progress of the protective equipment.

Disclosure of Invention

The invention provides a composite ceramic material which comprises the following components in parts by weight: 60-85 parts of mullite powder, 10-35 parts of zirconia, 3-7 parts of an additive and 10-30 parts of a pore-forming agent.

According to the invention, the purity of the mullite powder is the electrofused mullite powder with the aluminum content of more than 70 wt%. Preferably 65-80 parts and 65-75 parts by weight.

According to the invention, the purity of the zirconia is at least 99%. Preferably, the parts by weight of the zirconia are 15-30 parts and 20-25 parts.

According to the invention, the additive is barium carbonate and/or magnesium oxide. Preferably, the additive is 4-6 parts by weight.

According to the invention, the pore-forming agent is a TW-series pore-forming agent. Preferably, the weight portion of the pore-forming agent is 15-25 portions.

The invention also provides a preparation method of the composite ceramic material, which comprises the following steps:

(1) pulping: uniformly mixing mullite powder, zirconia, an additive and a pore-forming agent according to the weight parts, dispersing the mixture in ethanol, and performing ball milling to prepare slurry with excellent rheological property;

(2) and pouring the slurry into a mould to be fired at normal pressure to obtain the composite ceramic material.

According to the invention, in the step (1), the weight ratio of the mixture to the ethanol is 1 (0.8-1.5).

According to the invention, in the step (2), after the slurry is poured into the mold, bubble removal is also carried out, so that the composite ceramic obtained by sintering has uniform density.

According to the invention, in the step (2), the firing temperature is 1600-1700 ℃, and the firing time is 2-4 h.

According to the invention, in step (2), the firing is carried out in an inert atmosphere, for example in a nitrogen or argon atmosphere.

The invention also provides the composite ceramic material prepared by the method.

The invention also provides the application of the composite ceramic material as a shell material of the ceramic fuse tube.

The invention also provides a ceramic fuse shell containing the composite ceramic material.

The invention has the beneficial effects that:

the invention provides a ceramic material with air permeability, high thermal stability, high breaking capacity and high explosion resistance, which is characterized in that mullite powder with small expansion coefficient, low thermal conductivity and good thermal stability, yttrium stable zirconia material and pore-forming agent are matched, so that high temperature generated by instant fuse is reduced due to the uniformity of thermal expansion and heat conduction; meanwhile, the toughness of the ceramic tube is improved, the problem that the fuse is instantly fused, high temperature is generated to rapidly expand air in the ceramic tube, and bursting crack is generated due to insufficient strength; meanwhile, the tube wall has certain air permeability, so that the problem that the fuse is instantly fused to generate high temperature is well solved, internal pressure generated by rapid expansion of air in the fuse can be uniformly released from the tube wall, damage to the ceramic tube is reduced, and the ceramic is prevented from being cracked.

Detailed Description

The technical solution of the present invention will be further described in detail with reference to specific embodiments. It is to be understood that the following examples are only illustrative and explanatory of the present invention and should not be construed as limiting the scope of the present invention. All the technologies realized based on the above-mentioned contents of the present invention are covered in the protection scope of the present invention.

Unless otherwise indicated, the raw materials and reagents used in the following examples are all commercially available products or can be prepared by known methods.