Ceramic material refers to a kind of inorganic non-metallic material made by forming and sintering natural or synthetic compounds at high temperatures. It has the advantages of high melting point, high hardness, high wear resistance and oxidation resistance. Can be used as structural material, cutting tool material, because ceramics also has some special properties, but also as a functional material.
The development history of ceramic materials
The original ceramic is the general term for pottery and porcelain. That is, through the molding and high-temperature sintering of the molding sintering body. The traditional ceramic material mainly refers to the silicate aluminate. In the beginning, people's requirements for the selection of silicate aluminate are not high, the purity is not large, the particle size is not uniform, and the molding pressure is not high. At this time the ceramics are called traditional ceramics. Later, it developed to high purity, small particle size and uniform, high molding pressure, and the sintered body is called fine ceramics.
In the following stages, people studied the basis of the ceramic materials that make up ceramics, which brought about a great change in the concept of ceramics. The internal mechanical properties of ceramics are related to the chemical bond structure of the materials that make up ceramics. Any chemical substance that can form a strong three-dimensional network structure when forming crystals can be used as ceramic materials. These mainly include ionic compounds with relatively strong ionic bonds, elementals and compounds that can form atomic crystals, and substances that can form metallic crystals. They can all be used as ceramic materials. Secondly, fiber-reinforced composites were developed by drawing lessons from the characteristics of 3D bonding. It further broadens the range of ceramic materials. Ceramic materials have thus developed a generic term for materials that can be bonded in three dimensions.
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