white aluminum oxide High temperature refractoriness

High temperature refractoriness                                                                                                                          Refractory cone bend test under high temperature and poured extent, depending on the number of liquid and solid phase ratio of the dispersion liquid and the viscosity of  Fused zirconia mullite  the high-melting crystalline phase. Typically the cone reaches refractoriness was most similar to 70 inclusive to 80%, the liquidus viscosity of about 10 ~ 50Pa · s, and varies with the material. Therefore, unless the level considered refractory refractoriness and determination conditions, particularly with the test composition and the cone size and the rate of temperature increase of some material other than the relevant measurement atmosphere, mainly by the chemical and mineralogical composition of the material is controlled. Refractories composed of two components from a variety of single terms, depending  synthetic diamond  on the level of the melting point of the compound. And the multi-component constituted by a refractory material, the main component and the ratio depends on the number of his ingredients. Impurities seriously reduce refractoriness material. Such as Al2O3, alumina refractories content of 20 to 80% between, the refractoriness t can be approximated with Al2O3 and estimate the percentage of impurities R, ie t = 1580 +4.386 (Al2O3-R). Therefore, to improve the  white aluminum oxide  refractoriness of the refractory must increase the number of principal components and the main crystal phase and to minimize impurities.
Refractoriness determined in accordance with standard test methods refractoriness refractory GBT 7322-2007