Publish Time: 2022-08-02 Origin: Site
Advanced Ceramic usually refers to the use of high-purity, ultra-fine synthetic or selected inorganic compounds as raw materials, with precise chemical composition, sophisticated manufacturing technology, structural design, and ceramics with excellent properties. Advanced Ceramic can be classified into Advanced Ceramic with high strength, high hardness, high-temperature resistance, corrosion resistance, oxidation resistance, and other characteristics.
Here is the content list:
Alumina Advanced Ceramic
Silicon Carbide Based Advanced Ceramic
Zirconia Toughened Advanced Ceramic
Alumina Advanced Ceramic is a major engineering material with good mechanical and electrical properties, and therefore a wide range of applications. Alumina can be produced in a range of purities with additives designed to enhance performance. Various Advanced Ceramic processing methods, including machining or net shaping, can be applied to produce parts of various sizes and shapes. In addition, it can be easily attached to metal or other Advanced Ceramic through metallization and brazing techniques.
The density of silicon carbide Advanced Ceramic prepared by the hot pressing process can be close to the theoretical density, and the bending strength can still reach 500-600MPa even at a high temperature of about 1400℃. The C fiber reinforced silicon carbide composite prepared by the CVI method has a strength of 520 MPa and a fracture toughness of 16.5 MPa m. Adding 25vol% TiB to the silicon carbide composite Advanced Ceramic, if the initial particle size is strictly controlled, the strength can reach 888MPa, and the breaking strength can reach 8.8MPa·m. It can be said that silicon carbide is the strongest material in high-temperature air, and its thermal conductivity is second only to beryllium oxide Advanced Ceramic material. Many enterprises in China produce silicon carbide powder, a large part of which is exported, but mainly low-grade silicon carbide powder used in the manufacture of refractory bricks. Eastern Europe has a production capacity of 150,000 tons/year, and North America has a production capacity of 100,000 tons/year. High-purity, high-activity silicon carbide fine powder is very expensive, at $14-40/kg, with an annual demand of about $15 million. This powder is used to manufacture high-performance silicon carbide Advanced Ceramic.
Zirconia toughened Advanced Ceramic has made great progress in the research of structural Advanced Ceramic. There are also many varieties of Advanced ceramics toughened. The additives known to stabilize zirconia are magnesia, calcium oxide, lanthanum oxide, yttrium oxide, cerium oxide, and other single oxides or their composite oxides. In addition to stabilized zirconia, the toughened materials include Advanced Ceramic oxides such as alumina, thorium oxide, spinel, and mullite. Adding 16 vol% zirconia to alumina for toughening treatment, the obtained material has a strength of 1200 MPa and a fracture toughness of 15.0 MPa Zirconia toughened Advanced Ceramic material has the highest strength and fracture toughness at room temperature and will focus on improving its high-temperature performance in the future.
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