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Structural Ceramics The Most Promising Way

Hangzhou JWG Technology Co.Ltd | Updated: Sep 22, 2017

Composites are two or more materials of different chemical properties or different tissue phases, combined with microscopic or macroscopic forms. Structural Ceramics Ceramic matrix composites based on improved toughness can be divided into two categories: zirconia phase transformation toughened composites and ceramic fiber reinforced composites. Zirconia phase change toughening composite material is part of the zirconia powder and other ceramic powder mixture made of high toughness material, this material in the ceramic cutting tool has been widely used.

Fiber reinforcement is considered to be the most effective and promising way to improve the toughness of ceramics. Fiber strength is generally much higher than the matrix, Structural Ceramics it has a strengthening effect on the matrix; the same time the fiber has a significant ability to impede the expansion of the crack, thereby enhancing the toughness of the material. Structural Ceramics The most resilient ceramic is the fiber reinforced composite material. Another kind of reinforcing material is ceramic whisker, whisker size is very small, Structural Ceramics but it is almost perfect fibrous single crystal, its strength and modulus close to the theoretical value of the material, very suitable for ceramic reinforcement, the current material in the ceramic Cutting tools are widely used.

The oxide ceramics mainly include magnesium oxide ceramics, alumina ceramics, beryllium oxide ceramics, zirconia ceramics, tin oxide ceramics, silica ceramics, Structural Ceramics mullite ceramics. The most prominent advantage of oxide ceramics is the absence of oxidation problems. Alumina ceramic has the characteristics of high mechanical strength and large insulation resistance. It can be used as vacuum device, device porcelain, thick film and thin film circuit board, SCR and solid circuit shell, spark plug insulator and so on. Structural Ceramics Its strength and hardness, can be used as abrasive abrasive, textile porcelain pieces, knives and so on.

Magnesium oxide ceramic has a good electrical insulation, are weak alkaline substances, almost no erosion of alkaline substances, alkaline metal slag has a strong resistance to erosion. Many metals such as iron, nickel, uranium, thorium, molybdenum, magnesium, copper, platinum and so do not interact with magnesium oxide. Therefore, magnesium oxide ceramics can be used as melting metal crucible, casting metal mold, Structural Ceramics high temperature thermocouple protection tube and high temperature furnace lining materials. Magnesium oxide in the air is easy to absorb moisture and hydration to produce Mg (OH) 2, in the manufacturing process must pay attention. In order to reduce moisture absorption, should be appropriate to improve the calcination temperature, Structural Ceramics increase the size, but also increase the number of additives, such as TiO2 and so on. Beryllium oxide has a good thermal conductivity similar to that of metal, which is about 209.34 W / (m · k) and can be used as a heat sink;

Beryllium oxide ceramic also has a good nuclear performance, Structural Ceramics the neutron deceleration ability, can be used as atomic reactor reducer and radiation protection materials; In addition, the use of its high temperature than the bulk resistance of the larger nature, Structural Ceramics can be used to do high temperature insulation ; Use of its alkali resistance, can be used for smelting rare metals and high purity metal beryllium, platinum, vanadium crucible. Zirconia ceramic refractoriness, Structural Ceramics specific heat and thermal conductivity is small, is the ideal high-temperature insulation materials; chemical stability, high temperature can still acid and neutral substances corrosion.

Hangzhou JWG Technology Co.Ltd