摘要
以KOH为矿化剂,用水热法合成了Bi1.5ZnNb1.5O7纳米粉体。结合负离子配位多面体生长基元模型,研究了KOH浓度对粉体物相、粒径和形貌的影响。结果表明:采用水热法可合成单相立方焦绿石结构的Bi1.5ZnNb1.5O7纳米粉体,粉体呈颗粒状。稳定生长基元的形成是影响粉体粒径的主要因素,受KOH浓度影响较大,但粉体形貌并不受KOH浓度的影响。当c(KOH)为1.8mol/L,于220℃水热反应24h,合成粉体粒径最小为51nm,比表面积最大为28.8m2/g。
The Bi1.5ZnNb1.5O7 nanopowder was successfully synthesized by hydrothermal method （HTM） with Bi（NO3）3 · 5H2O, ZnO and Nb2O5 as starting materials and KOH as mineralizer. According to the growth unit model of anion coordination polyhedron, the effects of KOH concentrations on the phase, particle size and morphology of nanopowder were investigated. The results show that the Bi1.5ZnNb1.5O7 nanopowder with cubic pyrochlore phase can be obtained by HTM, and its morphology is of granular shape. The formation of stable growth unit is the major reason that effects the particle size of Bi1.5ZnNb1.5O7 powder, which is affected by the KOH concentration, but the morphology of powder does not change. The minimum particle size of powder is 51 nm and the maximum specific surface area is 28.8 m^2/g when the Bi1.5ZnNb1.5O7 powder is synthesized by HTM with a synthesis temperature of 220 ℃, a reaction time of 24 h, and a KOH molar concentration of 1.8 mol/L.
出处
《电子元件与材料》
CAS
CSCD
北大核心
2009年第4期4-6,共3页
Electronic Components And Materials
基金
河南省杰出青年科学基金资助项目(No.074100510008)
关键词
无机非金属材料
水热法
铌酸铋锌
纳米粉体
生长基元
non-metallic inorganic material
hydrothermal method
bismuth zinc niobate
nanopowder
growth unit
