摘要
碳酸钡和碳酸锶是无机盐化工基础原料,钡、锶的醇盐或醋酸盐都需通过其碳酸盐制备而得,本文探索了一种有利于降低成本的新实验路线和更为原子经济的新工艺。直接采用碳酸盐为原料,采用 sol gel法制备了 Ba0.8 Sr0.2 TiO3 (BST)薄膜;并利用 X射线衍射(XRD)、原子力显微镜(AFM)和X射线光电子能谱分析(XPS)等对 BST 薄膜的晶体结构和表面形貌及化学组态进行了分析。结果表明,利用碳酸盐代替醋酸盐为原料,采用 sol gel 技术制备 BST 铁电薄膜,能制备出均匀清澈的溶胶;所制备的 BST薄膜均匀致密,几乎为全钙钛矿结构。化学组态分析也表明所制备的薄膜中的钡、锶、钛、氧 4 种元素都以钙钛矿相结构中各元素相应的化学态存在。
Barium carbonate and strontium carbonate are basic starting chemical materials, and also the acetates or alkoxides of Ba & Sr are always fabricated from their carbonates in industry. Using carbonates directly for the substitute of acetates or alkoxides in industry was a more economical route. In this work, a novel sol-gel process to prepare Ba_(0.8)Sr_(0.2)TiO_3 (BST) thin films from carbonates was studied. The crystal structure, surface morphology, and the chemical state of the elements of BST thin films have been investigated by X-ray diffraction (XRD), atomic force microscopy (AFM), and X-ray photoelectron spectroscopy (XPS), respectively. The results show that the fabrication of the sol-gel derived BST thin films can be well carried out by using carbonate as the starting materials, the BST thin films have almost pure perovskite phase after being annealed at 700℃ and higher temperature, and the chemical configuration of the elements of BST thin films by XPS studies confirms the perovskite nature of the films.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2005年第3期343-345,共3页
Journal of Functional Materials
基金
国家自然科学基金重点项目资助项目(50132020)
