冷冻干燥法制备MgO－ZrO_2超细粉末  

PREPARATION OF MgO-ZrO_2 ULTRAFINE POWDER BY FREEZE-DRYING

作　　者：刘继富[1] 吴厚政[1] 谈家琪[1] 朱宣慧 

机构地区：[1]清华大学材料科学与工程系,天津大学材料科学与工程系

出　　处：《硅酸盐学报》1996年第1期105-108,共4页Journal of The Chinese Ceramic Society

摘　　要：采用冷冻干燥法制得了烧结性能良好的ｃ－ＺｒＯ_２（１０％ＭｇＯ，以摩尔计）超细粉末，并对冷冻干燥工艺进行了探索。粉末的煅烧温度为８００℃，成型后试样经１６００℃，２ｈ烧成，相对体积密度达到了９５％以上，且全部为立方相。A kind of c-ZrO_2(10%MgO,in mole)ultrafine powder with a high sinterability was prepared by freeze-drying,The hydrous zirconia gel prepared by precipitation was dispersed in Mg (NO_3)_2 solution and then freeze-dried.The c-ZrO_2(10%MgO) ultrafine powder is obtained by calcining the dried gel at 800℃for 1h.Fired at l600℃ for 2h,the relative bulk density of the samples made from the powder is up to 95%and the phase of the samples is all of cubic phase.

关 键 词：冷冻干燥 氧化镁 陶瓷粉末 

分 类 号：TQ174.756[化学工程—陶瓷工业]