STA Alumina Ceramic Roller - STA Electric Furnace MoSi2 and SiC heating element

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STA ceramic roller provides excellent dimensional precision, sufficient strength in high temperature zones, and excellent corrosion resistance. These characteristics make it very suitable for hearth kilns, kiln core tubes, heat resistance tubes, gas extraction tubes, gas introduction tube, acid resistance parts and many more.

Item	STAGB -70	STAGB -75	STAGB -80	STAGB -85	STAGB-90
Al2O3 %	≥72	≥74	≥78	≥85	≥90
Fe2O3 %	≤0.3	≤0.3	≤0.3	≤0.3	≤0.2
Bulk density g/cm3	2.4	2.6	2.8	3.4	3.5
Apparent porosity %	≤25	≤20	≤15	≤12	≤10
Water absorption %	≤12	≤10	≤7	≤6	≤5
Flexural Strength Mpa	25°C 50	25°C 60	25°C 70	25°C 80	25°C 90
Flexural Strength Mpa	1350°C 30	1350°C 40	1350°C 50	1350°C 60	1350°C 70
Coefficient of thermal expansion (25-1000°C) *10-6/°C	6
Thermal shock resistance 25-1300°C	Excellent	Excellent	Excellent	Excellent	Excellent
Working temperature °C	1200	1250	1300	1350	1400
Diameter Variation(mm)	+0.2, -0.3
Length Variation(mm)	+ /-1.5
Roundness(mm)	≤ 0.2

Item	STAGB -70	STAGB -75	STAGB -80	STAGB -85	STAGB-90
Al2O3 %	≥72	≥74	≥78	≥85	≥90
Fe2O3 %	≤0.3	≤0.3	≤0.3	≤0.3	≤0.2
Bulk density g/cm3	2.4	2.6	2.8	3.4	3.5
Apparent porosity %	≤25	≤20	≤15	≤12	≤10
Water absorption %	≤12	≤10	≤7	≤6	≤5
Flexural Strength Mpa	25°C 50	25°C 60	25°C 70	25°C 80	25°C 90
Flexural Strength Mpa	1350°C 30	1350°C 40	1350°C 50	1350°C 60	1350°C 70
Coefficient of thermal expansion (25-1000°C) *10-6/°C	6
Thermal shock resistance 25-1300°C	Excellent	Excellent	Excellent	Excellent	Excellent
Working temperature °C	1200	1250	1300	1350	1400
Diameter Variation(mm)	+0.2, -0.3
Length Variation(mm)	+ /-1.5
Roundness(mm)	≤ 0.2

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