Preparing and Electronic Structural Characteristic of Eu-doped BaTiO3 Nanometer Ceramic Materials

SUN Xiu-yun; LU Da-yongz; LIU Yi-chun

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Preparing and Electronic Structural Characteristic of Eu-doped BaTiO₃ Nanometer Ceramic Materials

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- Preparing and Electronic Structural Characteristic of Eu-doped BaTiO₃ Nanometer Ceramic Materials
- Chinese Journal of Luminescence Vol. 25, Issue 2, Pages: 188-192(2004)
- 作者机构：
  
  1. 中国科学院长春光学精密机械与物理研究所, 激发态物理重点实验室, 吉林, 长春, 130033
  2. 吉林化工学院,吉林吉林,132022
  3. 日本山形大学, 米市,日本,992-851
- 作者简介：
- 基金信息：
- DOI：
  CLC： O482.31
- Received：17 March 2003，
  
  Revised：02 June 2003，
  
  Published：20 March 2004
- 稿件说明：
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孙秀云, 路大勇, 刘益春. 掺入Eu的钛酸钡纳米晶陶瓷材料制备与电子结构特征[J]. 发光学报, 2004,25(2): 188-192

SUN Xiu-yun, LU Da-yongz, LIU Yi-chun. Preparing and Electronic Structural Characteristic of Eu-doped BaTiO3 Nanometer Ceramic Materials[J]. Chinese Journal of Luminescence, 2004,25(2): 188-192
孙秀云, 路大勇, 刘益春. 掺入Eu的钛酸钡纳米晶陶瓷材料制备与电子结构特征[J]. 发光学报, 2004,25(2): 188-192 DOI：

SUN Xiu-yun, LU Da-yongz, LIU Yi-chun. Preparing and Electronic Structural Characteristic of Eu-doped BaTiO3 Nanometer Ceramic Materials[J]. Chinese Journal of Luminescence, 2004,25(2): 188-192 DOI：

摘要

以Eu

、TiO

和BaCO

为原材料

在高温高压的极端条件下(4.0GPa

1090℃)采用固相反应法制备了结构均匀的新陶瓷材料Ba

1-x

TiO

(x=0.1～0.4)

样品显示灰黑色.当x增加到0.5时

出现ABO

型钙钛矿相和Eu

焦绿石相共存.X射线衍射图样显示Eu离子对A位Ba离子的均匀替代

并随着Eu含量的增加

结构向高对称性转变.通过对X射线衍射数据计算

表明材料结晶在平均粒度为几十纳米的数量级.X射线电子能谱(XPS)分析说明:在高压的作用下

离子部分被还原

在晶体结构中以Eu

离子(4f

)和亚稳态Eu

离子(4f

终态构形)稳定共存.同时在样品表面存在大量的吸附氧.Ba

1-x

TiO

材料的电中性由亚稳态Eu

离子和吸附氧(O

)共同补偿.

Abstract

Based on more inferior Eu solid solution into BaTiO

at ambient pressure and the reduction of high pressure

under extreme conditions with high pressure of 4.0 GPa and temperature of 1090℃

the solid state reaction was adopted in order to explore new-type functional Eu-doped BaTiO

ceramic materials

and its synthesizing law

structural and electrical structural characteristics.XRD(X-ray diffraction pattern)results showed that homogenous solid solutions of Ba

1-x

TiO

with gray black body color were prepared from x=0.1 up to 0.4

A-site Ba

ions were homogenously instituted by Eu ions.The x=0.1 sample was indexed as tetragonal;x=0.2 as diphase of tetragonal and cubic;x=0.3 and 0.4 samples were cubic.The crystal structure transforms to higher structural symmetry with increasing Eu content.As x was increased to 0.5

the ABO

-type perovskite phase and pyrochlore-type Eu

phase coexisted in the sample.It was determined from XRD data that all Ba

1-x

TiO

samples crystallized with size of few tens of nanometer.XPS(X-ray photoelectron spectra)analysis indicated that due to the reduction of high pressure and requirement of charge equilibrium

part Eu ions were reduced as metastable Eu

ions(4f

)

ions and Eu

ions co-existed in all samples

and their contents were approximately equal.Meanwhile

a large of adsorbated oxygen O

was detected on the surface of the samples.In nano-sized Ba

1-x

TiO

ceramics

charge equilibrium is compensated by metastable Eu

ions and adsorbed oxygen O

.This work will provide valuable information and open up a new field for further developing Eu-doping luminescence materials.

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