Application of zirconia and other special refractory materials in industrial production.

Zirconia and other special refractory materials.

Zirconia is acidic special refractories, melting point is 2650 ℃. Due to its high chemical stability is good, the highest temperature can reach 2400 ℃, can make in the vacuum furnace, molybdenum wire furnace, gas furnace, high frequency electric furnace, high temperature furnace lining materials such as single crystal furnace. In the metallurgical industry, it is used as a separation ring for continuous casting and horizontal continuous casting. In the single crystal furnace can be made into an insulated cover and lining.

Zirconia hollow sphere and zirconium oxide fiber products are the most superlative insulating materials in the current oxide. In the high temperature furnace not only do thermal insulation material, but also can be used as lining material directly.

Zirconia high temperature ceramics can be made into smelting, rare metal, precious metal crucible, as well as high temperature furnace tube and thermocouple protection tube. Also can be made into the flue, steel and other high temperature of liquid oxygen and temperature measurement of solid electrolyte, ceramic thermal engine and its parts, MHD power generation, electricity insulation, the insulation of the jet aircraft, missiles and ablative materials, burner of rocket, the spacecraft's former cone, nose, etc.

Zirconia high temperature ceramics can also be made into wire drawing die, cutting tool, spring, high temperature bearing, wear - resistant gasket, corrosion - resistant pump parts and grinding medium ball.

Zirconia special refractory materials can also be made into the heating body of high temperature electric furnace, thermistor, gas sensor, spray paint and castable refractory.

Other oxide (BeO, CaO, ThO2, CeO, SiO2) and other special refractory materials.

Beryllium oxide is a kind of basic special refractories, especially the large thermal conductivity, good thermal shock resistance and low electrical conductivity of the material, it has good nuclear properties, such as the neutron deceleration capability is strong, the X-ray has high penetrating power. However, due to its great toxicity, it is restricted in production and application. Can Be used to make smelting rare metal and high purity metal Be container, Pt, V, atomic reactor neutron moderator and anti-radiation material, used for high frequency electronics industry, insulation, cooling devices, etc.

Calcium oxide is also an alkaline special refractory. Although its melting point is very high, it is very limited in application. The products can be used as melting platinum, super pure uranium and non-ferrous crucible, jet metallurgical special refractory materials.

Special refractory oxide thorium, although a high melting point is 3050 ℃, the highest temperature can reach 2700 ℃, but radioactive. It can be used as the crucible for uranium, osmium, rhodium and radium, the nuclear fuel for atomic reactor, and the heating element for ultra high temperature electric furnace.

Ceria special refractory material, although the melting point is very high, but easy to be reduced. Its products can be used as a container for smelting rare earth metals, low resistance semiconductor devices, or abrasive materials.

Silica special refractory, with extremely low linear expansion coefficient, excellent thermal shock resistance. Fused quartz products can be used as metal liquid in the smelting of the pipeline, valve and pump lining. Fused quartz ceramics can be made into continuous casting with long nozzle brick and submerged nozzle brick.

In the chemical industry, quartz is used as an acid, corrosion-resistant container and reactor liner material. In the glass industry, make molten pool brick, arch flow ring, plunger and thermal repair materials.