Alumina Ceramic

According to purity difference, alumina is sorted into various grades. Unipretec provides high purity alumina materials including 95% alumina, 96% alumina, 99% alumina, 99.5% alumina, 99.8% alumina. A grade is chosen for different using environment to ensure the alumina components meet the specific using requirement and cost-effective at the same time.

95% alumina ceramic (A950) - this purity grade Alumina(Aluminum Oxide) provides excellent mechanical strength as well as electrical insulation. Due to the outstanding mechanical strength, it’s suitable for applications like plunger for pump, shaft and pin, cylinder liners, etc. Meanwhile its superior electrical-insulated properties at high temperature makes it performs great for electrical components, such as electrical insulator, high voltage insulator, insulated washers. 95% al2o3 ceramic can withstand temperature as high as 1500 °C, so it’s applied for high temperature components like thermocouple tubes.

96% alumina ceramic (A960) - it’s generally used for producing ceramic substrate. The alumina ceramic substrate offers electrical stability and strong flexural strength at high temperature. With the properties of electrical insulated, good thermal conductivity, low coefficient of thermal expansion (CTE) and good price, alumina substrate becomes one of the most durable and economical insulated substrate materials. Al2O3 substrate is also widely used in thin-film and thick-film electronics applications. It makes a reliable PCB substrate material that allows the designer to achieve higher power density designs.

99% alumina ceramic (A990) - higher purity alumina indicates enhanced wear, corrosion and temperature resistance. 99% alumina material can maintain good strength and stiffness under temperature as high as 1,650 °C. Therefore it’s an excellent material for sintering furnace plate used for MIM (Metal Injection Moulding) parts sintering. The 99% purity al2o3 ceramic can be machined or net shape formed into complex components. And it can be finely grind and lapped into very smooth surface. Typical applications such as piston for pressure washer pump, metering pump, seal rings, etc.

99.8% alumina ceramic (A998) - it’s high purity alumina material with free silica as well as low sodium purity level, so it’s able to be polished and achieve superior surface finish (min. Ra 0.05μm), better than that of 99% alumina. It’s a good choice when super smooth surface is needed. This material also perform strong inertness and extreme hardness. Used in extreme conditions demanding outstanding strength, high operating temperatures, and ultra-pure composition.