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.

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