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The operating principle of fused bricks and sintered bricks

What is a sintered brick: at high temperature but not higher than the melting point, the ceramic green solid particles are related to each other, the crystal grains become larger, the pores and grain boundaries are gradually reduced, and the total volume shrinks and the density increases due to the transfer of the substance. Finally, it becomes a dense polycrystalline sintered body with a certain microstructure, which is called sintering. After the powder is formed, the dense body obtained by sintering is a polycrystalline material whose microstructure consists of crystals, vitreous bodies and pores. The sintering process directly affects the pore size, grain size, and grain boundary shape and distribution in the microstructure, thereby affecting the properties of the material. This process has long been used to produce ceramics, powder metallurgy, refractory materials, and ultra-high temperature materials.
What is fused brick: In the method of raw material purification and synthesis, the electrofusion method is simplified compared with the sintering process, and the melting temperature is increased. When the mineralization agent is added without synthesis, a relatively high purity and well-developed crystal can be obtained. Its high temperature and corrosion resistance is better than sintering, and it has attracted more and more attention in recent years. Can be used in environments where ultra-high temperatures are used.

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