alumina crucible | high alumina ceramic crucible technical indicators
ceramic crucibleAlumina crucible specificationspdf
product
2
1
technical performance
"95"porcelain
"99"porcelain
check item
chemistry composition %
al2o3
93-95%
≥99%
sio2
2-3
≤0.2
fe2o3
≤0.03
≤0.03
r2o
≤1.0
≤0.5
physics peformance
durable temperature ℃
1650
1800
volume density g/cm3
≥3.5
≥3.8
thermal expansion factor(20-1000℃)10-6/℃
5.5-7.5
6-8
dielectric constantε
8.5-10
9-10.5
loss 20℃(tg×10-4)
<3
<2
after the surge of loss(tgδ×10-4)
<6
<4
bending strength(kg/cm2
>2800
>2800
than the volume resistance(ωcm)
   
    
20℃
1013

1013

200-300℃
>1012
>1012 ->1011
500℃
>1010
  
thermal stability 20℃-800℃-20℃
repeatedly 10 times no cracks
repeatedly 10 times no cracks
application
electricity vacuum devices、 device ceramic、thick、 films、textile devices、plate、sintering of color phosphor and rare earth of crucible、wear porcelain pieces、 grinding pieces、ceramic liner.
Alumina crucible specificationspdf

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