Mullite insulation brick is a high-alumina refractory brick with mullite as the main crystal phase. It has uniform thermal expansion, heat insulation, high temperature resistance, and good chemical corrosion resistance. It is used in hot blast furnaces, metal melting furnaces, forging furnaces, etc.

Item 项目			Mullite insulation Brick 莫来石隔热耐火砖
			IFB23	IFB26	IFB25	IFB28	IFB30	IFB32
Classification Temperature 分类温度	℃		1260	1400	1380	1500	1550	1600
Al2O3 %	≥		40	52	48	65	68	75
Fe2O3 %	≤		1.0	0.8	1.0	0.7	0.7	0.6
Bulk Density 体积密度(g/cm3)	≤		0.60	0.80	0.80	0.90	1.00	1.20
Cold Crushing Strength 常温耐压强度(Mpa)	≥		1.2	1.8	2.5	2.5	3.0	3.2
Modulus of Rupture 抗折强度（Mpa)	≥		1.0	1.7	1.4	2.3	1.8	1.9
Reheating Linear Change Rate 加热永久线变化 %	T/℃×8h		1230	1400	1350	1510	1550	1600
			-0.6	-0.6	-0.5	-0.8	-0.5	-0.5
Thermal conductivity 导热系数W(m.k)	200±25℃	≤	0.16	-	0.20	-	-	-
	350±25℃		0.20	0.29	0.21	0.35	0.40	0.49
	600±25℃		0.24	0.32	0.23	0.37	0.42	0.50
	800±25℃		0.28	0.28	0.27	0.35	0.43	0.51
	1000±25℃		0.33	0.33	0.32	0.38	0.44	0.53
	1200±25℃		-	0.36	-	0.41	0.47	0.54
Refractoriness under Load 0.05Mpa荷重软化开始温度℃	≥		1080	1200	1250	1300	1360	1470