Stability of the Suspensions of Al2O3 and ZrO2 Nano Powders

被引：0

作者：

Xu Chonghai ^{[1
,2
]}

Xiao Guangchun

Zhang Rongbo

Feng Yuemei

机构：

[1] Shandong Inst Light Ind, Sch Mech Engn, Jinan 250353, Peoples R China

[2] Shandong Univ, Jinan 250061, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2008年 / 37卷

关键词：

nano ceramic powder; Al2O3; ZrO2; steric stabilization; dispersion;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Preparation of homogeneously dispersed nanometer powder suspensions is the key step towards the high performance nano composite ceramic materials. In the present study, the suspension-of 1 vol% nano-Al2O3 and nano-ZrO2 in the non-aqueous ethyl alcohol solution were obtained via single steric stabilization using PEG dispersant and ethyl alcohol as the dispersive medium. Through adding PEG of different molecular weight, adjusting the amount of PEG and pH values of the suspension, highly dispersed and stable nano-Al2O3 and nano-ZrO2 in ethyl alcohol suspensions were achieved by optimizing the dispersion conditions. TEM observation showed that the particles were separated from each other absent of obvious particle agglomeration in the ZrO2 suspension. Therefore, the present process provides an effective mean to avoid the aggregation of the nano particles and their sedimentation that enables the formation of stable suspensions of the nano ceramic powders.

引用

页码：607 / 610

页数：4