refractory insulating alumina ceramic bush sleeve

refractory insulating alumina ceramic bush sleeve

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Alumina Ceramics:

Alumina ceramics are atomic crystals and are diamond-like nitrides that are stable to 2200 ° C. The room temperature is high and the strength decreases slowly with increasing temperature. It has good thermal conductivity and small thermal expansion coefficient, and is a good thermal shock resistant material. It has strong ability to resist molten metal erosion and is an ideal tantalum material for casting pure iron, aluminum or aluminum alloy. Aluminum nitride is also an electrical insulator with good dielectric properties and is also promising for use as an electrical component. Due to the characteristics of the aluminum nitride piezoelectric effect, the epitaxial stretching of the aluminum nitride crystal is also used for the surface acoustic wave detector. Aluminum nitride is used in optoelectronic engineering, including optical storage interfaces and electronic substrates as electrical layers, chip carriers for high thermal conductivity, and military applications. Ultra-fine aluminum nitride powder is mainly used as a thermal conductive filler for polymer materials. It is a very good, high thermal conductivity insulating filler. It has a wide application prospect in electronic glue, thermal conductive plastic, LED heat dissipation and heat transfer. At present, the application of aluminum nitride powder in the thermal conductivity of polymer materials is not optimistic, mainly when the customer uses the theoretical heat transfer heat transfer effect is too far from the actual test data. For this main reason, aluminum nitride powder is a material that easily absorbs moisture and oxygen. When it comes into contact with moisture and oxygen, it is hydrolyzed and oxidized. As a result, it loses its thermal and thermal properties. This is currently limiting nitrogen. A major problem in the use of aluminum powder. The aluminum nitride ultrafine powder, which has not been surface treated and modified, is difficult to be uniformly mixed with the polymer material, so that it is difficult to form a good heat conduction channel and interpenetrating network, and it is difficult to solve the heat conduction and heat transfer of the polymer.

High hardness, high strength, wear resistance, corrosion resistance, high temperacture (1600°), good thermal diffusivity, good insulativity, low cost etc. 

Data Sheet↓

Thermal Shock Resistance: 200 △T°C

Maximum use temperature 1650°C

Dielectric Strength: ＞10 KV/mm

Dielectric Constant: 9.1er

Dielectric Loss Angle(1MHz): 0.0002-0.0003

Volume Resistivity(20°C): ＞1014Ω.cm

7.MOQ is not limited, small quantity is welcome.

8.Vigorous team and good after-sales service

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A: Yes, we could offer the sample for free charge but do not pay the cost of freight.
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A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 50% T/T in advance ,balance before shippment.