铁酸铋薄膜退火工艺研究进展

发布时间：2018-06-20 18:52

本文选题：多铁性材料 + 铁酸铋薄膜　；参考：《表面技术》2017年02期

【摘要】：铁酸铋(BFO)多铁性材料因具有丰富的物理性能,以及其在存储器、传感器、电容器、光伏器件等方面的广阔应用前景,在过去几十年一直受到广泛的关注。然而,由于Bi元素在高温下容易挥发,所以很难合成纯相的BFO薄膜。此外,因存在氧空位或由于Fe离子变价导致的非化学计量比等缺陷,使其漏电流密度较大,严重影响BFO薄膜的铁电性能及实际应用。退火工艺是影响材料微结构及宏观性能的重要因素,因此通过退火工艺来调控BFO薄膜的结构及性能是一种十分有效的手段。然而,退火工艺包括退火时间、退火气氛、退火温度以及退火方式等多种形式,究竟每一种退火形式如何影响BFO薄膜的结构及性能是值得探讨的问题。为此,综述了退火工艺(括退火时间、退火气氛、退火温度以及退火方式)对BFO薄膜的结构(晶粒尺寸、形状,电畴尺寸、类型,表面形貌)和性能(磁性、铁电性、介电性、漏电性、导电机制)的影响的研究进展,并提出了一些亟待解决的问题。
[Abstract]:Bismuth ferrite (BFO) multiferroic materials because of its physical properties and the rich, in memory, sensor, capacitor, broad application prospects of photovoltaic devices, in the past few decades has attracted extensive attention. However, because Bi elements are easily volatile at high temperature, so it is difficult to synthesize pure BFO film phase. In addition, due to the existence of oxygen vacancies Or because of non stoichiometric Fe ion valence than that of defects, the leakage current density is high, and the serious influence the practical application of the ferroelectric properties of BFO. The annealing process is an important factor affecting the properties and micro structure of materials, structure and properties of the annealing process to control BFO thin film is a very effective means. However, the annealing process including annealing time, annealing atmosphere, annealing temperature and annealing in various forms, whether each annealing form how to influence the structure and properties of BFO films is worthy of discussion. Therefore, summarized the annealing process (including annealing time, annealing atmosphere, annealing temperature and annealing on BFO thin film structure) the ( The grain size, shape, domain size, type, surface morphology and properties (magnetic), ferroelectric, dielectric properties, leakage, conductive mechanism) research progress influence, and puts forward some problems to be solved.
【作者单位】：重庆科技学院冶金与材料工程学院;
【基金】：国家自然科学基金(51372283;51402031;61404018) 重庆市自然科学基金(CSTC2015jcyj A50015) 重庆市教委科学研究项目(KJ1501310;KJ1501318) 重庆高校创新团队建设计划资助项目(CXTDX201601032) 重庆科技学院博士基金(CK2015b05);重庆科技学院院士专家工作站合作项目(CKYS2014Z01;CKYS2014Y04);重庆科技学院大学生科技创新项目~~
【分类号】：TB383.2;TG156.2

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