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The development trend of precision ceramic materials at home and abroad

Date: 2018-07-01
Browse: 3

In recent years, countries around the world are to shift from traditional ceramic to ceramic, ceramic has been confined to areas such as art, everyday, because of its good heat resistance, biocompatibility, such as performance, is widely used in heat transfer, thermal mechanical, sensitive sensors, optical field, medical areas and in areas such as new energy, is now the focus of national research.


The new type of ceramics is superior to traditional ceramics, existing metal or non-metal materials in high temperature, corrosion, abrasion, superhardness and superconductivity. The new ceramic also has the properties of photosensitivity, gas sensitivity, heat sensitivity, humidity sensitivity, piezoelectric and so on, which are the basis of the manufacture of artificial intelligence materials. Therefore, some countries, especially those with advanced economy and technology, have placed the development of new ceramic materials in an important strategic position, and a large number of engineering technicians and funds have been transferred to the research and development of new ceramic materials.


Precision ceramics, also known as high performance ceramics, engineering ceramics, etc. As far as the main components are concerned, they can be divided into carbide, nitride, oxide and boron etc. In terms of use, it can be divided into structural ceramics, cutting ceramics and functional ceramics.


Ordinary ceramics have been widely used in building materials and light industry. But as precision ceramic, it with ordinary ceramic: is the main difference between the fine ceramic after strict selection of raw materials, which accords with a requirement for maximum gain the high purity of raw materials, and the particle size of materials used as thin as possible, secondly to precisely control the chemical composition, avoid the impurities and don't want to were mixed with dust or volatilization loss of each component and micro-structure do control form, for sintering particle size, particle interface, porosity and so on are very attention. In this series of efforts, the unique ceramic characteristics of various outstanding performance was fully reflected.


With the development of modern industrial technology, some of the requirements for material properties have exceeded those of metal materials or plastics. Aimed at saving energy efficient furnace, for example, require material under the high temperature of 1500 ° C above work, but the metal material of high temperature performance limit only around 1200 ° C, because of some of the high temperature mechanical parts only helps to ceramic material. Besides high temperature resistance, corrosion resistance, wear resistance and other properties are also higher than metal materials.


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