High purity and temperature resistant insulated tube, as a Thermocouple Protection Sheath or Alumina ceramic tubes heating element.
About alumina oxide ceramic
The Vacuum furnace tube could resist 99% high temperature, abrasion, acid and alkali resistant, high strength and good toughness.
Products are widely used in electric appliances, mines, coal, industry, machinery, boilers, aerospace, electronics and other fields.
Alumina oxide ceramic can be made into the following products:
1. 99% porcelain tubes and military accessories.
2. Corundum high aluminum tube.
3. Wear resistance of alumina ceramic bushing.
4. Precision tube for electrical ceramics and appliances.etc.
1. High temperature resistance
Porous alumina tube has a high melting point (up to 1750 degrees Celsius) and a high boiling point.
2. Corrosion resistance
It can be used under strong acids, strong bases, inorganic, organic salts, etc.
Because the material is non-magnetic, it does not absorb dust and reduces surface flaking.
4. Electrical insulation
Insulator at room temperature, high resistivity, can be used in equipment that requires insulation.
Material Data. Sheet
|General||Property||Units||99.5% alumina||99% alumina||95% alumina|
|Fracture toughness||Mpa m 1/2||4-5||4-5||3-4|
|CTE (20-800℃)||1×10 -6 /℃||6.5~8.0||6.2~8.0||5.0~8.0|
|Thermal conductivity (25℃ )||W/m.k||30||29||24|
|Specific heat||1 x 10 3 J/(kg·K)||0.78||0.78||0.78|
|Volume resistivity (25℃ )||ohm.cm||＞1 x 10 14||＞1 x 10 14||＞1 x 10 14|
|Dielectric constant (1Mhz)||(E)||9.7||9.5||9.5|
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