Dispersion and Rheology of Aqueous Suspensions of Nanosized BaTiO 3
Dispersion and Rheology of Aqueous Suspensions of Nanosized BaTiO 3
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纳米BaTiO 3 水悬浮液的分散和流变学
DOI：
10.1111/j.1744-7402.2009.02467.x
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发表时间：
2010
影响因子：
2.1
通讯作者：
Santacruz I
中科院分区：
文献类型：
--
作者：
Santacruz I
研究了商品化纳米BaTiO 3粉体水悬浮液的zeta电位和流变行为。考察了固体体积分数、分散剂种类和浓度、均质技术和均质时间对分散效果的影响。因为原样粉末含有约5wt%的有机物，所以将粉末煅烧至350°C/0.5小时。 煅烧后，使用聚丙烯酸基分散剂与四甲基氢氧化铵的组合和10分钟的超声，对于具有高达80重量%固体的悬浮液实现了良好的分散。 通过粉浆浇铸获得的绿色坯体具有相对低的密度（2.6 g/cm 3，43%TD），但具有均匀的、无团聚体的微观结构。
The zeta potential and the rheological behavior of aqueous suspensions of a commercial nanosized BaTiO3powder were studied. The influence of the volume fraction of solids, the kind and concentration of dispersant, the homogenization technique, and times were investigated. Because the as‐received powder contained ∼5 wt% organics, the powder was calcined to 350°C/0.5 h. After calcination, a good dispersion was achieved for suspensions with up to 80 wt% solids using a polyacrylic‐based dispersant combined with tetramethylammonium hydroxide and 10 min of ultrasound. Green bodies obtained by slip casting had relatively low densities (2.6 g/cm3, 43% TD), but homogeneous, agglomerate‐free microstructures.