干压成型工艺参数对ZrO2干法制粒坯体孔隙率的影响  

Effect of the Dry Pressing Process Parameters on Porosity of ZrO2 Body Prepared by Dry Granulation

作　　者：徐婷婷 白国润 张小辉 XU Tingting;BAI Guorun;ZHANG Xiaohui(School of Ceramic Art,Jingdezhen Ceramic Institute,Jingdezhen 333403,Jiangxi,China;School of Mechanical and Electronic Engineering,Jingdezhen Ceramic Institute,Jingdezhen 333403,Jiangxi,China)

机构地区：[1]景德镇陶瓷大学陶瓷美术学院,江西景德镇333403 [2]景德镇陶瓷大学机械电子工程学院,江西景德镇333403

出　　处：《中国陶瓷工业》2020年第4期14-18,共5页China Ceramic Industry

摘　　要：为改善ZrO2陶瓷干法制粒坯体孔隙率偏高等问题,探究干压成型工艺参数对坯体孔隙率的影响。自主搭建实验平台,对ZrO2粉体进行造粒,改变加压压力与保压时间,制备坯体试样。结合阿基米德法,分析孔隙率与体积密度、表观密度和真实密度的关系,修正孔隙率计算模型。采用SEM图对微观形貌进行表征,验证实验结果的准确性。结果表明:加压压力与保压时间对ZrO2坯体孔隙率有明显影响。为制备孔隙率低的ZrO2陶瓷,对工艺参数进行优化。当加压压力为60 MPa,保压时间为120 s时,制得孔隙率较低的ZrO2陶瓷坯体,孔隙率为6.41%。In order to address the problem of high porosity of ZrO2 ceramic body prepared by dry granulation, and figure out the effect of dry pressing process parameters on the porosity of green body, an experimental platform was set up independently to granulate ZrO2 particles. The samples of body were prepared with the pressure and well time changed. By means of Archimedes method, the relationship between porosity rate and bulk density, apparent density and real density are analyzed, the calculation model of porosity is revised, the micro-morphology were characterized with SEM images so as to verify the accuracy of the experimental results. The results indicated that pressure level and holding time have obvious effects on the porosity of ZrO2 body. In order to prepare ZrO2 ceramics with low porosity, the process parameters were optimized. When pressure was 60 MPa and holding time was 120 s, ZrO2 ceramic body with low porosity was prepared, and the porosity is 6.41 %.

关 键 词：ZRO2陶瓷 干法制粒 干压成型 坯体孔隙率 

分 类 号：TQ174.75[化学工程—陶瓷工业]