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Novel aluminum oxide metal ceramic sealing element and preparation method thereof

A cermet and alumina technology, which is applied in the field of new alumina cermet seals and its preparation, can solve the problems of insufficient stability, toughness and uniformity of its microstructure, etc., to ensure integrity, enhance Reliability and service life, the effect of eliminating sticking

Inactive Publication Date: 2014-05-07
NINGBO DONGLIAN MECHANICAL SEAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the development of science and technology, the performance of ordinary alumina ceramic materials is not enough to ensure the stability of its components in harsh working environments such as aerospace and field exploration, especially in sealing components where ceramic materials are widely used. Ordinary alumina ceramic materials are insufficient in both toughness and uniformity of microstructure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A new type of alumina cermet seal, which is prepared by the following components according to weight percentage: 72% alumina, 4% cerium oxide, 4% aluminate, 3.1% calcium carbonate, 3.1% magnesium carbonate, wax emulsion 1.5%, ammonium polymethacrylate 1.5%, kaolin 10.8%.

[0026] The preparation method of the above-mentioned novel alumina cermet seal comprises the following process steps:

[0027] 1) Mix alumina, cerium oxide, aluminate, calcium carbonate, magnesium carbonate and kaolin evenly according to the weight ratio, and carry out wet grinding in a ball mill for 45 hours. The ratio of ball to material is 1:3, and the weight ratio of solid to liquid 1:1;

[0028] 2) Dry the powder obtained in step 1) using a steam drying oven;

[0029] 3) Take an appropriate amount of wax emulsion and ammonium polymethacrylate according to the weight percentage, heat and mix it at 100°C for 40 to 60 minutes, and pass it through a 100-mesh sieve after cooling;

[0030] 4) Mix th...

Embodiment 2

[0042] A new type of aluminum oxide cermet seal, which is prepared by the following components according to weight percentage: 76% aluminum oxide, 3% cerium oxide, 3% aluminate, 2.5% calcium carbonate, 2.5% magnesium carbonate, wax emulsion 1%, ammonium polymethacrylate 1%, kaolin 11%.

[0043] The preparation method of the above-mentioned novel alumina cermet seal comprises the following process steps:

[0044] 1) Mix alumina, cerium oxide, aluminate, calcium carbonate, magnesium carbonate and kaolin evenly according to the weight ratio, and carry out wet grinding in a ball mill for 48 hours, the ball-to-material ratio is 1:3, and the solid-to-liquid weight ratio 1:1;

[0045] 2) Dry the powder obtained in step 1) using a steam drying oven;

[0046] 3) Take an appropriate amount of wax emulsion and ammonium polymethacrylate according to the weight percentage, heat and mix it at 120°C for 50 minutes, and pass it through a 110-mesh sieve after cooling;

[0047] 4) Mix the mi...

Embodiment 3

[0054] A new type of aluminum oxide cermet seal, which is prepared by the following components according to weight percentage: 82% aluminum oxide, 4% cerium oxide, 2% aluminate, 1.2% calcium carbonate, 3.1% magnesium carbonate, wax emulsion 0.8%, ammonium polymethacrylate 0.8%, kaolin 6.1%.

[0055] The preparation method of the above-mentioned novel alumina cermet seal comprises the following process steps:

[0056]1) Mix alumina, cerium oxide, aluminate, calcium carbonate, magnesium carbonate and kaolin evenly according to the weight ratio, and carry out wet grinding in a ball mill for 50 hours. The ratio of ball to material is 1:3, and the weight ratio of solid to liquid 1:1;

[0057] 2) Dry the powder obtained in step 1) using a steam drying oven;

[0058] 3) Take an appropriate amount of wax emulsion and ammonium polymethylacrylate according to the weight percentage, heat and mix it at 130°C for 60 minutes, and pass it through a 120-mesh sieve after cooling;

[0059] 4...

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Abstract

The invention relates to a novel aluminum oxide metal ceramic sealing element and a preparation method thereof. The novel aluminum oxide metal ceramic sealing element is composed of aluminum oxide, cerium oxide, aluminate, calcium carbonate, magnesium carbonate, wax emulsion, poly(ammonia methacrylate) and kaolin. The novel aluminum oxide metal ceramic sealing element composed of the previous ingredients is improved in both material toughness and uniformity.

Description

technical field [0001] The invention relates to a sealing part and a preparation method thereof, in particular to a novel alumina cermet sealing part and a preparation method thereof. Background technique [0002] Alumina ceramics, as a widely used ceramic, have been used more and more widely in modern society because of its superior performance. However, with the development of science and technology, the performance of ordinary alumina ceramic materials is not enough to ensure the stability of its components in harsh working environments such as aerospace and field exploration, especially in sealing components where ceramic materials are widely used. Ordinary alumina ceramic materials are insufficient in both toughness and uniformity of microstructure. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide an alumina cermet seal and a preparation method thereof, whose toughness and material uniformity in the microstr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/622
Inventor 李友宝励永平崔贵胜
Owner NINGBO DONGLIAN MECHANICAL SEAL
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