Identification of wear-resisting ceramics

1, the preface

Wear-resisting ceramics with its strong abrasion resistance, excellent performance, has become one of the most optimal wear-resisting material, get a wide range of industrial enterprises, especially welcome by cement production enterprise.But, undeniably, wear-resisting ceramics industry disorderly competition, the wear-resisting ceramics had a few problems in the process of popularization and application, these problems make people on the understanding of the wear-resisting ceramics produced some misunderstanding, caused the adverse effect for the promotion of wear-resisting ceramics.

This article embarks from the research on ceramic wear mechanisms, misunderstanding of these one by one, discusses and puts forward the key factors influencing the wear-resisting ceramics using effect is the combination of the quality of the ceramics, ceramic and equipment method, selection of viscose and construction process control.Hope of cement enterprises and is committed to cement enterprise equipment wear friend help.

2, wear-resisting ceramics is introduced

As long as the category of wear-resisting ceramics is very wide, theory for abrasion resistance for the purpose and the production of ceramic products can be called the wear-resisting ceramics, including SiC and Al2O3, Si3N4, ZrO2, etc.But because the SiC, Si3N4, ZrO2 production cost is high and manufacture is difficult, difficult to large-scale industrialization and popularization and application.So it calls the "wear-resisting ceramics", generally refers to AL2O3 as the main raw material production to obtain the wear resistance of ceramics, this concept is the earliest one of the main production enterprises by domestic wear-resisting ceramics fine city, hunan province special ceramics co., LTD., is now widely accepted.

Al2O3 is an extremely versatile important industrial raw materials, abundant in Al element in the earth's crust, which accounts for about 27%, second only to the Si content in the earth's crust.Except for very rare ruby, sapphire, nature exists in the crystalline morphology of alumina, the vast majority of Al element in various compounds form, need to pass to form artificial purified and high temperature firing of alpha Al2O3 as the main raw material of wear resistant ceramic.Commonly used wear-resisting ceramics is 95 alumina ceramics, its hardness is second only to diamond, with super wear resistance, can replace a large number of rare precious metals.It is alumina content greater than 95% alumina as raw material, through 1700 ℃ high temperature sintering, and by adding different additives, can precisely control the chemical composition and excellent performance of ceramics.Al2O3 ceramics with excellent comprehensive performance and reasonable price become the pronoun of "wear-resisting ceramics".

Usually alumina ceramics is divided into two categories, one kind is high alumina porcelain, another kind is corundum porcelain.High alumina porcelain is Al2O3 and SiO2 as the main component of ceramic, among them the content of Al2O3 is around 45%, as the grow in quantity of Al2O3 content, high alumina porcelain of various performance indicators are improved;Corundum ceramics is Al2O3 content in more than 92% of ceramic.It is worth noting that the good and evil people mixed up wear-resisting ceramics market, some manufacturers use wear-resisting ceramics ill-defined, user can't lofty aluminum porcelain and corundum porcelain, the difference between the price very cheap alumina porcelain used as wear-resisting ceramics, to obtain unfair competition, not only harm the interests of users, has a bad influence on the healthy development of the industry.At present, the national standard wear-resisting ceramics is launched by precise with hunan city special ceramics co., LTD. Wear-resistant ceramic standardization committee, believe that along with the national standard wear-resisting ceramics, this mess will be contained.