摘要
采用简单的一步醇盐水解包裹工艺在市售纳米氧化铝颗粒表面均匀地包裹了一层厚度为4-5nm的纳米晶氧化锆,形成核壳结构的氧化物纳米复合粉体.通过简单的锆源及酸浓度的控制,可以实现包裹的氧化锆层厚度的可控调节.借助XRD、TEM、FE-SEM及EDS等测试手段对合成的材料进行了形貌与结构表征,结果表明这种纳米氧化锆包裹氧化铝的核壳复合结构材料,可以有效地抑制氧化铝在高温煅烧下的晶粒过分长大,实现在较低煅烧温度下即具有均匀致密的表面形貌.
A zirconia coated alumina nanocomposite was synthesized by the one-step alkoxide hydrolyzing method. A layer of very uniform nanocrystalline zirconia shell with its thickness about 4-5nm was successfully coated onto the commercial nano-alumina particle. The thickness of the zirconia layer can be controllable by adjusting the concentrations of zirconium source and acetic acid. The results show that such novel core-shell nanocomposite powders of alumina-zirconia can be helpful to inhibit the much faster growth of alumina particles and show the uniform surface morphogenesis. XRD, TEM, FESEM and EDS were used for the structural characterizations.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2005年第5期1054-1058,共5页
Journal of Inorganic Materials
关键词
核壳结构
醇盐水解
氧化锆包裹氧化铝
core-shell structure
zirconia coated alumina
alkoxide hydrolysis
