摘要
以分析纯Bi2O3、Na2CO3和Nb2O5为原料,以NaCl为熔盐,采用熔盐法合成出片状Bi2.5Na3.5Nb5O18（简称BNN5）晶体。研究了合成温度、保温时间和熔盐含量对BNN5晶体形貌的影响。结果表明：随着合成温度的提高、保温时间的延长和熔盐含量的增加,BNN5粉体的尺寸逐渐增大。当熔盐与总反应物的质量比为1∶1,在1100℃下保温3 h时,可以制备出片状的BNN5晶体,其边长为12-24μm,厚度为0.5-2μm,有望成为外延生长〈001〉NaNbO3片状晶体的理想模板。
Flake Bi2.5Na3.5Nb5O18（BNN5） crystal was prepared by molten salt method using NaCl as molten salt,reagent grade oxide or carbonate powders of Bi2O3,Na2CO3 and Nb2O5 as raw materials.The influences of synthesis temperature,holding time and the content of the molten salt on the morphology of the BNN5 crystal were studied.It was found that the grain size increased as the synthesis temperature,soaking time and molten salt content increasing.As the weight ratio of the molten salt to total reactants is 1∶1,the flake BNN5 crystal can be prepared at 1100 ℃ for 3 h,whose edge length and thickness is 12-24 μm and 0.5-2 μm respectively.This flake BNN5 crystal is an ideal template for extent growth of 〈001〉 NaNbO3 flake crystals.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2010年第5期1186-1190,共5页
Journal of Synthetic Crystals
基金
国家自然科学基金(No.50962007)
江西省自然科学基金(2009GZC0063)
江西省教育厅青年科学基金(GJJ09533)
