Zirconium oxide plasticizing mullite ceramic material and preparation method thereof

Abstract

The invention relates a zirconia-toughened mullite ceramic material and manufacturing method thereof, which is manufactured through modern toughening and strengthening technologies with zirconium silicate and Alpha-aluminum oxide as a substrate, yttrium oxide, magnesium oxide, calcium oxide and titanium oxide as a mineralizer, and mullite as a seed crystal. The material is toughened and strengthened through the modifying treatment and the green compact has good uniformity and compactness with the aid of an isostatic pressing. The sintering process is completed within one time in the shuttle kiln under normal pressure and high temperature conditions, having a uniform temperature and low cost. Compared with an aluminum oxide ceramic material, the invention has advantages of high strength, high tenacity, high wear resistance and simple process; the dramatic reduction of sintering temperature can achieve the purpose of energy efficiency.

Description

technical field [0001] The invention relates to a zirconia toughened mullite ceramic material and a preparation method. Background technique [0002] Traditional lead oxide (corundum) structural ceramic materials are widely used because of their extensive and cheap raw materials and low requirements for technical equipment. The firing temperature of lead oxide structural ceramics is relatively high, generally reaching above 1600°C, and the energy consumption is serious; at the same time, due to oxidation The fracture toughness of lead ceramics is low, so its bending strength and wear resistance are poor; therefore, for some fields that require high wear resistance and mechanical strength, such as ceramic cylinder liners for petroleum lead wells, lead oxide ceramics cannot be used. Material preparation. Zirconia ceramics have high mechanical strength and fracture toughness, but are very expensive. At the same time, zirconia ceramics are prone to low-temperature aging, so it...

AI Technical Summary

Problems solved by technology

[0002] Traditional lead oxide (corundum) structural ceramic materials are widely used because of their extensive and cheap raw materials and low requirements for technical equipment. The firing temperature of lead oxide structural ceramics is relatively high, generally reaching above 1600°C, and the energy consumption is serious; at the same time, due to oxidation The fracture toughness of lead ceramics is low, so its bending strength and wear resistance are poor; therefore, for some fields that require high wear resistance and mechanical strength, such as ceramic cylinder liners for petroleum lead wells, lead oxide ceramics cannot be used. material preparation

Zirconia ceramics have high mechanical strength and fracture toughness, but are very expensive

At the same time, zirconia ceramics are prone to low-temperature aging, so it is difficult to promote them on a large scale

Lead oxide ceramic material has poor wear resistance, short service life, poor toughness, low strength, high firing temperature and high energy consumption