The main chemical ingredient of cordierite is 2mgo.2al2o3.5sio2,main material is steatite,clay,alumina,feldspar,etc. manufactured by normal ceramic technic, can be used for loop framework,insulators of arc-resistance,element of composite materials,bumable nozzle of electrical insulators,and etc.
|
ITEM |
TEST CONDITION |
UNIIT SYMBOL |
ZIRCONIA |
|
THE MAIN CHEMICAL INGRDIENT |
|
|
2mgo 2agl2o3 5sio2 |
|
BULK DENSITY |
|
gm/cc |
2.5 |
|
MAXIMUM USE TEMPERATURE |
|
|
1000 |
|
WATER ABSORPTION |
|
% |
0 |
|
HARDNESS |
|
HV |
800 |
|
BENDINGSTRENGTH |
20 |
kgf/cm2 |
900 |
|
COMPRESSIVE STRENGTH |
20 |
kgf/cm2 |
3500 |
|
FRACTURE TOUGHNESS |
k(I c) |
map.m3/2 |
|
|
COEFFICIENT OF THERMAL EXPANSION |
|
|
<=2.0 |
|
COEFFICIENT OG THERMAL CONDUCTIVITY |
25-30 |
w/m k |
1.3- |
|
THERMAL SHOCK RESISTANCE |
TC |
|
250 |
|
DIELECTRICITY CONSTANT |
1MHZ.2.5 |
|
6 |
|
DIELECTRIC STRENGTH |
25-30 |
ac-kv/mm(ac v/mil) |
10 |
|
VOLUME RESISITIVITY |
20 |
ohm-cm |
|
