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Outer pipe shell material containing tetragonal zirconia and preparation method thereof

A technology of phase zirconia and shell materials, which is applied in the manufacture of fuses, electrical components, circuits, etc., can solve the problems of low thermal stability, inability to process thin-walled ceramic shells, and unsatisfactory

Inactive Publication Date: 2010-08-11
咸阳澳华瓷业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this ceramic product are: low thermal stability, its ΔT<1400°C, and it cannot be processed into a thin-walled ceramic shell with a thickness of 0.3mm-0.6mm, which cannot meet the needs of some special equipment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The formula of the ceramic material of this embodiment consists of:

[0015] Aluminum oxide, with a purity of 90%-99.9%, is 95% by weight;

[0016] Ultrafine nano-zirconia, the purity is 99%-99.9%, and the weight part is 5;

[0017] The additive yttrium oxide has a purity of 95%, and the weight part is 1 magnesia.

[0018] After batching and dry ball milling, mix various raw materials evenly; add 10-15% of the above-mentioned total weight of industrial paraffin as a thermoplastic material, add 0.1% of the above-mentioned total weight of beeswax as a surfactant, add 0.2% of the above-mentioned total weight Analytical pure oleic acid was used as a dispersant.

[0019] Hot fluid injection molding process is adopted, that is, in the prepared ceramic raw material ultrafine powder, add: the above-mentioned 10% of the total weight of industrial paraffin as a thermoplastic material, the above-mentioned 0.5% of the total weight of beeswax as a surfactant, and the above-mention...

Embodiment 2

[0021] The formula of the ceramic material of this embodiment consists of:

[0022] Aluminum oxide, with a purity of 99.9%, is 70 parts by weight;

[0023] Ultrafine nano-zirconia, the purity is 99%, and the weight part is 30;

[0024] Additive: yttrium oxide with a purity of 99.9%, 1 part by weight; magnesium oxide: magnesium oxide with a purity of 95.0%, 1 part by weight.

[0025] The preparation process is as follows: mixing various raw materials evenly through batching and dry ball milling; adding 15% industrial paraffin as thermoplastic material, adding a trace amount of 0.5% beeswax as a surfactant, and adding a trace amount of 0.2% analytically pure oleic acid as a dispersant;

[0026] Using hot fluid injection molding technology, that is, in the prepared ceramic raw material ultrafine powder, add: the above-mentioned 15% of the total weight of industrial paraffin as a thermoplastic material, the above-mentioned 0.1% of the total weight of beeswax as a surfactant, and...

Embodiment 3

[0028] The formula of the ceramic material of this embodiment consists of:

[0029] Aluminum oxide, with a purity of 95%, is 80 parts by weight;

[0030] Ultrafine nano-zirconia, the purity is 99.5%, and the weight part is 20;

[0031] Additives: calcium oxide, yttrium oxide, with a purity of 96%, and 2% by weight; cerium oxide, with a purity of 99%, and 1% by weight.

[0032] Preparation process, with embodiment 1.

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PUM

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Abstract

The invention relates to an outer pipe shell material containing tetragonal zirconia and a preparation method thereof. The material comprises the components: aluminium oxide, superfine nano-zirconia and additive, wherein the aluminium oxide has the purity of 90-99.9% and the parts by weight of 70-95; the superfine nano-zirconia has the purity of 99-99.9% and the parts by weight of 5-30; the additive is one, two or more in four additives comprising yttrium oxide, magnesium oxide, calcium oxide or cerium oxide; and the four additives have the purity of 95-99.9% and the total parts by weight of 1-3. The invention adopts a thermal fluid injection molding technique to form a round or square thin wall tubular structure green body which is sintered at 1560-1580 DEG C for 20-24h. The sintered ceramic material microcosmic crystal phase contains 70-95wt% of aluminium oxide and 5-30wt% of zirconia, wherein the zirconia with the tetragonal stable phase has the weight percent of 5-70%. The invention better solves the technical problems of a thin wall mini-fuse outer pipe shell.

Description

technical field [0001] The invention relates to an outer shell of a miniature fuse, in particular to an outer shell of a thin-walled fuse. Background technique [0002] The micro-fuse element in the traditional electronic circuit protection system, the fuse outer shell is made of ceramic material, the composition of which is 95% alumina ceramics, which is formed by dry pressing or hot die-casting. Atmosphere sintering is complete. The disadvantages of this ceramic product are: low thermal stability, its ΔT<1400°C, and it cannot be processed into a thin-walled ceramic shell with a thickness of 0.3mm-0.6mm, which cannot meet the needs of some special equipment. Contents of the invention [0003] The object of the present invention is to provide a tubular fuse ceramic shell with high thermal stability, high strength, and a thickness of the tube wall that can be as thin as 0.3 mm and a preparation method thereof. [0004] The present invention is achieved like this: [0...

Claims

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Application Information

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IPC IPC(8): H01H85/17H01H69/02C04B35/10
Inventor 陈佑学蒲忠敏刘见弟
Owner 咸阳澳华瓷业有限公司
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