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porcelain promotional ceramic mugs cup drinkware What is called the refractoriness to determination

Ceramic Mug    From:Xinxiang Ceramic Mug Manufacturers    
porcelain promotional ceramic mugs cup drinkware

The refractory melt at high temperature, exhibits softening temperature is called the refractoriness. Method for determination of refractoriness is: the sample on each side length 2 mm into the bottom, bottom each side length 8 mm, 30 mm high, the cross section is an equilateral triangle triangular cone rhyme. The pyramid of sample and standard temperature compared with cone together heating, to observe the change of specimen. If the sample is due to high temperature and the weight of its own role and bent to contact the bottom plane, when the temperature is called the refractory material refractoriness.
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