Item

Brand and index

Hd-gms-13

Hd-gs-14

AL₂O₃           %                  

≥73

≥92

Volume   density      g/cm³

≥2.6

≥2.8

Normal-temp  compression strength

      MPa

110^oCx24h

>65

>70

1100^oCx3h

>80

>90

Normal-temp  bending   strength

     MPa

110^oCx24h

>8

>9

1100^oCx3h

>9

>10

Linear change    Ratio  After    Firing   %     1000^oCx3h

-0.3

-0.2

Normal-temp  abrasion   (cc) 1000^oCx3h

<10

<8

Thermal  conductivity, times(1000^oC,water cooling)

>20

>20