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《Powder Metallurgy Technology》 1993-01
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SURFACE MODIFICATION OF ULTRAFINE CERAMIC POWDERS

Xu Mingxia Guo Ruisong Yang Zhengfang(Tianjin University,Tianjin 300072)Shi Guoshun(Beijing Physicochemical Analysis and Measurement Center,Beijing 100080)  
ZrO_2(Y_2O_3)ultrafine ceramic powders were prepared by step-by-step precipitation and using several surfactants to modify their surface. The density, pore distribution, sinterability, particle morphology and phase composition of prepared powders were measured by mercury intrusion method,TEM,SEM and XRD respectively. It was shown that appropriate amount of surfaetant was favourable for controlling agglomeration and improving dispersity and fluidity of the powders. Small pore size and narrow pore size distribution of modified powders compacts were also obtained. In addition, the modified powders have spheric shape, fine and homogenous particle size,high content of t-ZrO_2 and good sinterability.
【Fund】: 国家自然科学基金;; 北京中关村地区联合测试中心资助
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