Refractory material high-temperature load deformation temperature

The YB/T370 standard has four definitions: load softening temperature (the temperature at which refractory products undergo deformation under constant compressive load under specified heating conditions), high expansion temperature T0 (the temperature at which the sample expands to the maximum value), x% deformation temperature Tx (the temperature at which the sample compresses a certain percentage (x) of the original height from the maximum expansion value) The temperature Tb at which the ceramic disc bursts or ruptures (the temperature at which the specimen suddenly bursts or ruptures after T0); A principle (under constant load and temperature rise

At a rate, the cylindrical specimen undergoes deformation under the combined action of load and high temperature, and the corresponding temperature for determining the specified degree of deformation is determined by the zirconia ceramic processing manufacturer

The load deformation index of refractory chemical ceramics at high temperatures indicates its resistance to both high temperature and load, and also indicates the softening range of refractory materials that exhibit significant plastic deformation. The measurement method for the high-temperature load deformation temperature of refractory materials is to fix the pressure on the sample, continuously increase the temperature, and determine the temperature of the sample when a certain amount of deformation and collapse occur, which is called the high-temperature load deformation temperature.

The reason for the different load deformation curves of refractory materials mainly depends on the composition of chemical minerals in the product, which depends on:

(1) The existing crystalline phase, crystal structure, and properties, i.e. whether the crystal forms a network skeleton or is dispersed in an island like manner in the liquid phase. The former has a high deformation temperature, while the latter's deformation temperature is mainly determined by the content and viscosity of the liquid phase. It can be seen that the microstructure structure has a significant impact on the load deformation temperature of the product.

(2) The number of alumina crystal and liquid phases and the viscosity of the liquid phase at a certain temperature.

(3) The interaction between crystal and liquid phases can alter the quantity and properties of the liquid phase. In addition, the density of the product also has a certain impact on the high-temperature load deformation temperature.

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