Refractory Magnesia Brick
Item	MZ-91	MZ-92	MZ-93	MZ-94	MZ-97
MgO, % ≥	91	92	93	94.5	97
SiO2, % ≤	4	3.5	2.5	2	2
Fe2O3, % ≤	1.3	-	-	1.2	1.2
CaO, % ≤	2.5	2.5	2	1.8	1.8
Apparent Porosity, % ≤	18	18	18	18	18
Bulk Density, g/cm3 ≥	2.86	2.9	2.95	2.92	2.95
Cold Crushing Strength Mpa, ≥	60	60	50	60	60
0.2Mpa Refractoriness Under Load T0.6 ºC	≥1570	≥1560	≥1620	≥1650	≥1700
Thermal Shock Resistances 100 ºC water cycles	≥18	≥18	≥18	≥18	≥18

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