国产模特91不卡一区二区_国产成人精品午夜福利在线播_国产成人免费视频精品一区二区_无码国产午夜一区二区

The specific gravity of zinc oxide after high-temperature calcination (calcination temperature at 1250 degrees Celsius, Xinfengrun firing curve) will increase to 2.0 to 2.5. The use of glaze in the glaze is good, no thixotropic, no pinhole, can increase the speed of the kiln High yield bricks. Zinc oxide that is not calcined or whose calcining temperature is not enough and whose specific gravity is not enough will affect the process performance of the glaze and reduce the production stability.