Brique de mullite frittée

Sintered mullite brick has excellent high-temperature performance, haute résistance, caractère réfractaire élevé sous charge, excellente stabilité aux chocs thermiques, bonne stabilité chimique, and good corrosion resistance to acidic and alkaline slag.

Specification of sintered mullite brick

Article	Indice
	SM65	SM70	SM75	SM80
Al₂Ô₃ %	≥64	≥68	≥74	≥78
Fe₂Ô₃ %	≤1,2	≤1,2	≤1,0	≤0,8
Porosité apparente %	≤18	≤18	≤17	≤16
Densité apparente g/cm³	≥2.45	≥2.50	≥2,60	≥2.75
Résistance à l'écrasement à froid MPa	≥60	≥70	≥75	≥85
0.2Caractère réfractaire de Mpa sous charge ℃	≥1580	≥1600	≥1650	≥1700
Permanent Linear Change Rate % 1500℃×2h	-0.4~+0.1	-0.3~+0.1	-0.2~+0.1

Characteristics of sintered mullite bricks

Low thermal conductivity and heat capacity.
High purity and low impurity content.
High temperature resistance and can directly contact flames.
High strength and excellent thermal shock resistance.

Uses of sintered mullite bricks

Sintered mullite bricks can be used for high-temperature hot blast stoves, large blast furnace hearths, and bottoms, steelmaking electric furnace tops, ceramic industrial kiln lining, kiln furniture, glass kiln cement kiln lining

Comparison between sintered mullite bricks and fused mullite bricks

Sintered mullite bricks have higher mechanical strength and load deformation temperature, high density, faible porosité, high crystalline phase content, and no abnormality in the thermal expansion curve. En général, the high-temperature flexural strength of sintered mullite bricks is higher than that of fused mullite bricks. This is due to the existence of some small but well-developed crystal networks in the structure. Sintered mullite bricks have good volume stability and good creep resistance due to their larger crystals.