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What Are The Physical Properties of the Refractory Materials ?

Date:2017-08-24 09:19 From:Zhengzhou Sunrise Refractory Author:sunrise
Structural properties
Macroscopic organization structure of  heterogeneous body composed of solid materialand gas hole. Porosity is the important factors influencing the products under normal temperature and hightemperature performance, especially under the condition of high temperature, is products to the outside worldof erosion resistance ability is greatly reduced. Reason of gas hole formation: when products molding, the air inthe material is completely ruled out. After material moisture ruled out, leaving space. Raw material calcined isinadequate, some should decomposition of salt is the complete decomposition, should be burning ingredientsto burn completely. The material composition is uneven, when high temperature firing, contraction is uneven,etc.
1. porosity
The porosity of refractory can be divided into: closed porosity, closed in the products is not connected with the outside world. Open pores, closed at one end and the other end connected with the outside world, for fluid filling. Cut-through pore, The two sides of the cut-through products, get through for the fluid.
2. Bibulous rate  Bibulous rate is absorbed by all the open pores in the products of water quality and the quality of the dry sampleratio. Because the bibulous rate of determination method is simple, in actual production often used for identifying the quality of raw material calcined. The raw material calcined is the better, the bibulous rate value is the lower.
3. Bulk density
The definition of bulk density is the ratio of dry weight and total volume of products, also known as a volumetric weight. Volume density intuitively reflects the degree of the density of the products, it is an important measure indicator of  dense refractory products quality. But in the production of  lightweight insulation products,in order to reduce the heat capacity and thermal conductivity, people use various means to reduce the product volume density.
4. True proportion
The quality of dry material and its true volume (not including pore volume) ratio. The true proportion of refractorymaterial, can reflect the material composition of purity or the degree of crystal structure transition, proportion,etc.


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