model number | AK--25 | AK--35 | AK--45 | AK--65 | AK--75 |
classification temperature(℃) | 1260 | 1400 | 1430 | 1600 | 1700 |
density(kg/m3) | 300--600 | 300--600 | 300--600 | 300--600 | 500--700 |
permanent change on heating (%)
presintering or not
|
1000℃*24hr1.2/3 |
1100℃*24hr
1.2/3
|
1250℃*24hr
1.2/3
|
1500℃*24hr
1/-
|
1600℃*24hr
1/-
|
Al2O3 | ≥42 | ≥49 | ≥32 | ≥69 | ≥83 |
SiO2+Al2O3 | ≥98 | ≥99 | ≥85 | ≥99.5 | ≥99.5 |
Fe2O3 | ≤0.2 | ≤0.2 | ≤0.1 | —— | —— |
ZrO2 | —— | —— | ≥13 | —— | —— |