근청석 세라믹 스풀
Cordierite Ceramic Bobbin Heater is one of the most popular ceramics for its properties of excellent thermal stability, high refractoriness, good chemical durability, low dielectric constant, and low thermal expansion.Cordierite ceramic is extensively used in important industrial applications such as micro electronics, refractory products, heat exchanger for gas turbines, thermal shock-resistant table ware, catalyst supports, and porous ceramics. Low -expansion cordierite is suitable for being applied at high temperature circumstance where a good thermal shock resistance is required.
The ceramic bobbin heater are made of cordierite. Cordierite is characterized by excellent insulation, extreme low thermal expansion coefficient, and excellent infrared heating function at a certain temperature, long working life, and energy efficiency. Cordierite ceramic parts, including thread tubes, hot plates, and electrical heaters and so on, are widely used in electric heating industry, home appliances, machinery and other fields.
Specification Of Cordierite Ceramic Bobbin Heater
Item Unit&Symbol Cordierite ceramics
The main chemical ingredient 2MgO 2Al2O3 5SiO2
Bulk Density gm/cc 2.5
Maximum Use Temperature 1000°C
Water absorption % 0
Hardness HV 800
Bending Strength Kgf/cm2 900
Compressive Strength Kgf/cm2 3500
Fracture Toughness Map.m3/2 –
Thermal expansion 1X 10-6/°C ≤2.0
Thermal conductivity W/m °K 1.3-
Thermal Shock Resistance °C 250
Dielectricity constant 6
Dielectric strength ac-kV/mm (ac V/mil) 10
Volume Resistivity ohm-cm > 1012
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