Alumina ceramics mainly includes alumina , which applies to thick film integrated circuits. Alumina ceramics have good conductivity, mechanical strength and high- temperature resistance. Alumina ceramics is widely used in all sorts of field to meet the needs of daily use and special performance.Alumina electrical ceramics have low dielectric constant, low dielectric loss, high insulation strength, high volume resistivity, good bending strength, high stability, high compressive strength and good cold and hot shock denaturation. It is widely used in temperature controllers, insulation parts, thermal equipment, electric heating equipment, iron structure buildings, shipbuilding, etc.Classification of alumina ceramics:
High-purity alumina ceramics are ceramic materials containing more than 99. 9% aluminum. Because their sintering temperature is as high as 1650-1990℃ and transmission wavelength is 1-6MM, they are generally made into molten glass instead of platinum crucible. It can be used as sodium lamp tube according to its light transmittance and alkali metal corrosion resistance ; It can be used as integrated circuit substrate and high frequency insulating material in electronic industry.
Ordinary alumina ceramics are divided into 99 porcelain, 95 porcelain, 90 porcelain, 85 porcelain, etc. according to different aluminum content, and sometimes those with aluminum content of 80% or 75% are also classified as ordinary alumina ceramics. Among them, 99 alumina porcelain material is used to make high temperature crucible, refractory furnace tube and special wear-resistant materials, such as ceramic bearings, ceramic seals and water valve plates; 95 alumina porcelain is mainly used as corrosion-resistant and wear-resistant parts; 85 porcelain is often doped with talc, which improves its electrical properties and mechanical strength. It can be sealed with molybdenum, niobium, tantalum and other metals, and some of them are used as electric vacuum devices.
Zirconia ceramics are white, yellow or gray when containing impurities, and generally contain HfO2, which is difficult to separate. There are three crystalline States of pure ZrO2 under normal pressure. The production of zirconia ceramics requires the preparation of powders with high purity, good dispersibility, ultrafine particles and narrow particle size distribution. There are many preparation methods of ultrafine zirconia powders. The purification of zirconia mainly includes chlorination and thermal decomposition, alkali metal oxidation decomposition, lime melting, plasma arc, precipitation, colloid, hydrolysis and spray pyrolysis.
Zirconia ceramics, ZrO2 ceramics and Zirconia ceramics have excellent properties such as high melting point and boiling point, high hardness, insulator at normal temperature and conductivity at high temperature.
Zirconia ceramics have the advantages of high toughness, high bending strength, high wear resistance, excellent thermal insulation performance and thermal expansion coefficient close to steel, so it is widely used in the field of structural ceramics. It mainly includes: Y-TZP grinding ball, dispersing and grinding medium, nozzle, ball valve seat, zirconia mold, miniature fan axis, optical fiber pin, optical fiber sleeve, wire drawing die and cutting tool, wear-resistant cutter, clothing button, watch case and watchband, bracelet and pendant, ball bearing, light hitting rod of golf ball and other wear-resistant parts at room temperature.
In the aspect of functional ceramics, its excellent high temperature resistance can be used as induction heating pipes, refractory materials and heating elements. Zirconia ceramics have sensitive electrical performance parameters, which are mainly used in oxygen sensors, Solid Oxide Fuel Cell, SOFC) and high-temperature heaters. ZrO2 has a high refractive index (n-21 22). By adding certain coloring elements (V2O5, MoO3, Fe2O3, etc.) into ultrafine zirconia powder, it can be made into colorful translucent polycrystalline ZrO2 material, which shines like natural gems and can be made into various decorations. In addition, zirconia is widely used in thermal barrier coatings, catalyst carriers, medical treatment, health care, refractory materials, textiles and other fields.
Features of Alumina Ceramic Eyelet Guide
1) A variety of specifications available.
2) Satisfy various technical request
3) Lower medium spoilage
4) Good insulation performance and high temperature resistance
5) Stiffness texture
6) Used in all electric products and electric heating products
We can supply the products according to customer's drawings, samples and performance requirement.