High-strength and high-abrasion-resistance brown aluminum oxide ceramic and preparation method thereof

Abstract

The invention discloses a high-strength and high-abrasion-resistance brown aluminum oxide ceramic and a preparation method thereof and belongs to the technical field of aluminum oxide ceramics and aims to solved the technical problems and remarkably improving the mechanical property of the ceramic under the situation that the firing temperature is not improved, decreasing raw materials, reducing the manufacturing cost and improving the production efficiency. According to the adopted technical scheme, the high-strength and high-abrasion-resistance brown aluminum oxide ceramic is prepared from,by weight, 1-3.5 parts of manganese dioxide, 1-3 parts of iron trioxide, 0.1-0.5 part of magnesium oxide, 0.5-1.5 parts of silicon dioxide, 0.5-2 parts of kaoline, 2-8 parts of calcium oxide, 2-5 parts of zirconium oxide, 0.3-0.8 part of cobaltic oxide, 1-3 parts of barium carbonate, 0.3-0.8 part of chromic oxide and 100 parts of aluminum oxide. The prepared high-aluminum ceramic product has darkand light-toned brown colors due to different ingredient contents and is attractive in appearance.

Description

technical field [0001] The invention discloses a high-strength, high-wear-resistant brown alumina ceramic and a preparation method thereof, which belong to the technical field of alumina ceramics, and in particular relate to the preparation of a high-strength, high-wear-resistant brown alumina ceramic. Background technique [0002] Alumina ceramics is a ceramic material with alpha AL2O3 as the main crystal phase, and its alumina content is generally between 75 and 99%. It is customary to classify according to the alumina content in the ingredients. The alumina content of about 75% is called "75" magnetism, and the alumina content of about 99% is called "99" magnetism. Alumina is widely used in the fields of electronics, machinery, textiles, automobiles, chemicals, and metallurgy due to its wide source of raw materials and relatively low price. [0003] High-alumina ceramics refer to alumina ceramics with an alumina content of 90-99%. Usually, oxides such as CaO, MgO, and Si...

AI Technical Summary

Problems solved by technology

[0004] However, in some occasions with harsh working conditions, the unique characteristics of alumina ceramics, such as poor toughness, low strength, high abrasion and polluted raw materials, restrict its use.

In order to improve the strength and wear resistance of alumina ceramics, alumina raw materials with smaller particle sizes can be used; such as hot pressing sintering, hot isostatic pressing sintering, vacuum sintering, atmosphere sintering, microwave sintering, etc. Sintering method; methods such as adding nano-alumina, nano-silicon carbide, alumina fiber, mullite fiber, silicon carbide fiber, etc. can also be used; the method of stress-induced in-situ generation of rod crystals or the generation of layered ceramics can also be used to Improve its performance, but these methods either have extremely high cost of raw materials, or expensive and complicated equipment, or are difficult to mass-produce, which limits the application of these methods