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Electrical engineering

Agriculture

Alumina

High content alumina with is used to produce electrical insulation, electrical and radioactive ceramic products, special types of ceramics, electric ceramics, refractories, grinding and abrasives; low content alumina is used as catalyst and for others to produce high alumina cement.(GB 30559-98)

Category：

Metallurgy

Email:

mike@sinotraderesource.com

Description

Index item	Specification standard
Index item	GN	GKES	GNK	GLMKMK	GK-1	GK-2	GK-3	GK-4	GK-5		GEHF	GEHB		GSK	GS M
GB code	30559-98
Massfraction, %
Si0₂＜	0.1	0.1	0.1	0.1	0.12	0.12	0.12	0.12	0.12	0.12			0.08		0.2
Fe₂0₃＜	0.03	0.04	0.04	0.03	0.03	0.06	0.06	0.06	0.06	0.1			0.02	0.04	0.15
Na₂＜	0.1	0.1	0.2	0.1	0.3	0.3	0.3	0.3	0.4	0.5			0.3	0.5	1 .5
loss on ignition, ＜	0 .2	0 .2	0. 2	0. 2	0. 2	0. 2	0.2	0.2	0.15	0.2			0.4	1 .5	0.5
α-A1₂0₃	≥94	≥92	≥90	≥93	≥90	≥85	≥85	≥90	≥85	≥85-90			≥70	≤30
Mass fraction of single crystal particles in the aggregate，%
0-5Micron, ＞	90	95	80	-	-	80	70	-	-	-			-	-	-
0-10Micron, ＞	-	-	-	-	80	-	-	80	80	-			-	-	-
Usage	Used for refractories, grinding and abrasives