Sand blast nozzle main performance index
Serial number performance index measuring unit high purity alumina alumina high
Alumina
1 al2o3 % 99.7 99.3 85
2 sio2 % less than0.1
3 density g/cm3 3.95 3.88 3.2
4 wter absorption % 0 0.01 0.2
5 cld compressive strength mpa 450 350 200
6 20 degree celsius leak rates torr/l.Sec less than10-11 less than10-11 less than10-11
7 twisting in high temperature mm 1700 degree
Celsius 0.2
Allowance
1600 degree
Celsius 0.2
Allowance
1400 degree
Celsius 0.2
Allowance
8 bonding in high temperature 1700 degree
Celsius
Non-caked
1600 degree
Celsius
Non-caked
1400 degree
Celsius
Non-caked
9 20¡a1000 degree celsius coefficient of mm.10-6/degree
Celsius.M
8.6 8.2 8.2
Thermal expansion
10 thermal conductivity w/m.K 25 25 25
11 electric insulation strength kv/mm 20 20 15
12 20 degree celsius direct current ohm/cm 1014 1014 1014
Insulating resistance
13 high-temperature 1000 degree
Celsius m|¸
¡y0.08 ¡y0.08 ¡y0.08
Insulation resistance 1300 degree
Celsius m|¸
¡y0.02 ¡y0.02 ¡y0.02
14 thermal shock resistance 1550 degree
Celsius 6
Times not
Racked
1550 degree
Celsius 6
Times not
Cracked
1300 degree
Celsius 3
Times not
Cracked
15 maximum service temperature degree celsius 1900 1800
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