Rare earth elements are present in more than 100 minerals,of which monazite,bastnaesite and xenotime are typical rar......

利用磷石膏为主要原材料，加入适当外加剂制成的磷石膏陶瓷材料，性能优良，抗压强度达８０ＭＰａ以上，外观色彩美丽，配方中磷石膏占６０％￣８０％。......