Fired brick brick brick firing Which is the most professional, usually referred to as burned brick, brick, is producing the largest output, the most widely used basic bricks. Our good quality magnesite, abundant clay Which sell well, cheap brick, in the domestic market enjoyed a high reputation. Refractories (Refractory material) the true density is the true density refractories (Refractory material) in the solid mass to its true volume (volume of solid portion) ratio. True specific gravity is the ratio of the true mass of the unit volume of the material mass and 4 ℃ unit volume of water. Both can be considered the same in value. The international community has a true specific gravity of this concept is no longer used, but in Japan refractories (Refractory material) Technology Association of editing and publishing the "refractories (Refractory material) Handbook," a book is still in use true proportion. In refractories (Refractory material) in clay, silica brick true density is a measure of the degree of conversion of quartz important technical indicators. Different true density of SiO2 composition of the various minerals, the true density of the minimum phosphorus cristobalite, cristobalite, followed by quartz maximum. In the study phase transition where the clay when multiphase materials most professional in the chemical composition of a certain time, according to the true density of the data to determine the phase composition of the material. For the true density of refractory products and refractory materials, according to the national standard GB / T5071-1997 (identical with ISO5018: 1983) were measured. Which is the most professional clay, shangzhuang Refractories (certified), Anhui brick by shangzhuang Refractories Co., Ltd., Zhengzhou City. Zhengzhou City shangzhuang Refractories Co. (www.yntjj.com.cn) (www.yntjj.com.cn) is Zhengzhou, charge, flux leader, over the years, the company is implementing the scientific management, innovation and development, honesty and trustworthiness guidelines, and satisfy customer needs. In shangzhuang refractory leadership with the staff warmly welcome all inquiries negotiations to create shangzhuang Refractories a better future. You can also access (www.yntjj.com.cn/supply_details_45555595.html), for more information about the company.