Brand Specification	Submerged nozzle		Slide plate for blowing argon gas
	Al2O3 –C (body)	ZrO2–C (slag line)	Al2O3 –C	Al2O3 –ZrO2–C
Al2O3     %	>45	-	>85	>80
C+SiC    %	>26	>15	>5	>5
ZrO2       %	-	>70	-	>5
Apparent porosity  %	<18	<20	<8	<7
Bulk density  g/cm3	>2.5	>3.20	>3.0	>3.1
Normal temperature Compressive strength (MPa)	>20	>20	>80	>80
Normal temperature blending strength (MPa)	>7.0	>7.0	>7.0	>10.0