Phosphate bonded alumina bricks	Phosphate abrasion resistant bricks	Bricks of high refractoriness under load	Anti-spalling bricks	Abrasion-resist bricks
	XL-P	XL-PA	XL-PH	XBZ-70	XL-NM
Al2O3 ≥%	75	77	75	70	48
Cold crushing strength≥MPa	60	65	60	70	65
Bulk density≥g/cm3	2.65	2.70	2.75	2.60	2.50
Apparent porosity	17	18	20	22	17
Refractoriness under load≥℃	1400	1300	1500	1480	1530
Refractoriness>℃	1780	1780		1790
Linear change after heating 1500℃*3h%			+0.4
Thermal shock resistances water cycle				30	10