The influence factors of abrasion resistant tile

To obtain high wear resistance of Al2O3 ceramic material, not only should consider to make it with high density, flexural and compressive strength, and to improve its hardness and fracture toughness, and these properties and the microstructure of Al2O3 ceramics (closed porosity, grain size and distribution of glass phase, etc.) and its wear mechanism are closely related. 

Alumina ceramic preparation of various process conditions are sintering and the microstructure of it has great influence.They include: the preparation process of powder, particle size and particle size distribution, forming method, green density, sintering temperature, heating rate, holding time, sintering atmosphere, whether pressure and so on.Core property of abrasion resistant tile of pottery and porcelain is to control the three main factors: the best alumina materials and the preparation method of grinding grading, high density, reasonable sintering temperature and holding time, the production of wear-resistant ceramic has excellent comprehensive performance, microstructure shows that also is very beneficial to improve the wear resistance. 

1, the influence of raw material powder abrasion resistant tile of pottery and porcelain is the most important raw materials of high purity Al2O3 powder, its performance is good or bad, and how much content has a great influence on the alumina ceramics.It is inevitable that the absorbing impurities during the preparation of ceramic powder in, the organic impurities will be burned in sintering process, in the process of densification form irregular holes;While inorganic impurities may react with ceramic powder in high temperature stage or residual micro cracks formed in the substrate.Defects caused by impurities on the microstructure of alumina ceramics has distinct effect on the densification, so the preparation of high purity Al2O3 powder is important prerequisite for good performance of alumina ceramics.

Of a typical abrasion resistant tile  of pottery and porcelain production in through multi-channel processes purification industrial sintering alumina powder as raw material, according to the requirements of the products, according to certain formula mix powder, and then after sintering molding technology were made.Made of wear-resistant ceramic has very good performance, but because of the whole process longer, so the production cost is higher.In order to save costs, the market also has a direct use minerals such as kaolin) as the main raw material, add a small amount of sintering alumina.Even some use recycles alumina ceramic waste as main ingredients, which has formed the alpha alumina ceramics with the surrounding molecules to form organic combination, density and wear resistance.This is why wear-resisting ceramics spreads on the market one of the main reasons. 

2, the influence of raw material powder fineness of the powder fineness of raw materials on product performance influence is very big, only thin enough raw materials, the final burnt products is likely to form crystallite structure, make it have good wear resistance.Al2O3 powder particles, the more fine, the greater the activity and can promote the sintering, ceramic made of the higher intensity.Small particles can also be scattered because of corundum and different linear expansion coefficient of glass phase in the grain boundary caused by stress concentration, reduce the risk of cracking;Fine grain can also hinder the development of micro cracks, not easy to cause transgranular fracture, is beneficial to improve the fracture toughness, also can improve the wear resistance.