Thermal conductivity of ceramic fiber products
● physical significance: characterizing the size of the thermal conductivity of the material.
● numerical value: the material in the area of 1 square meters, on the thickness of 1 meters, in 1 hours time, the conduction heat is 1 watts, then the thermal conductivity of the material is 1W/m.k. 1Kcal/m.h. C =1.163 W/m.k.
● influencing factors: the value of the thermal conductivity of the material depends on the structure, bulk density, temperature, pressure, ambient atmosphere and humidity of the material.
● the numerical determination: the direct test method and the calculation method are usually adopted.
Calculation method: natural material lambda =0.035+0.203 (t /1000) 2kcal.m.h. C
Synthetic material lambda =0.054+0.272 x 10-6 t 2W/m.k
Test method: hot wire method. Features: fast speed, low accuracy.
Plate method. Features: slow speed, high accuracy