Y掺杂BaZrO3质子导体的常压和高压合成及表征
薛燕峰1, 王 野2, 许大鹏1, 李莉萍3, 郭星原1, 苏文辉1,4,5
- 1. 吉林大学 物理学院, 长春 130021; 2. 长春理工大学 理学院大学物理基础教学部, 长春 130022; 3. 中国科学院 福建物质结构研究所, 福州 350002; 4. 哈尔滨工业大学 凝聚态科学与技术研究中心, 哈尔滨 150001; 5. 中国科学院 国际材料物理中心, 沈阳 110015
Synthesis and Characterization of Y Doped BaZrO3 Protonic Conductors under Common and High Pressure
XUE Yan feng1, WANG Ye2, XU Da peng1, LI Li ping3, GUO Xing yuan1, SU Wen hui1,4,5
- 1. College of Physics, Jilin University, Changchun 130021, China; 2. Department of Foundation Teaching of College Physics, School of Science, Changchun University of Science and Technology, Changchun 130022, China;3. Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China; 4. Center for the Condensed\|matter Science and Technology, Harbin Institute of Techology, Harbin 150001, China;
摘要： 利用固相反应法和高压高温法研究BaZr1-xYxO3(x=0,0.05,0.10,0.15,0.20)的合成. XRD和Raman谱结果表明, 在常压和1 300 ℃进行固相反应不能得到纯立方钙钛矿相BaZr1-xYxO3. 对上述样品进行高压（3.6 GPa）再处理, 低掺杂量样品（x=0,0.05）在500 ℃时得到较纯的立方钙钛矿相, 表明增加压力可促进固相反应; 在高掺杂量样品（x≥0.1）中出现少量BaCO3和m-ZrO2相, 表明增加压力不利于固相反应. 高压合成样品的晶格常数和晶胞体积均小于常压合成的样品. 保持压力不变, 当温度为1 000 ℃时, 各样品均出现明显的BaO杂相. 表明在500 ℃时, 高压处理可提高BaZr1-xYxO3 xO3(x=0,0.05,0.10,0.15,0.20) were prepared by solid-state reaction method under high-pressure and high-temperature. XRD and Raman measurements show that the products obtained by solid state reaction method at 1 300 ℃ belonged to cubic perovskite structure, but part of high degree diffract peaks split slightly. The samples （x=0,0.05） were in pure cubic perovskite structure under high pressure (3.6 GPa) and temperature (500 ℃), which shows that press can accelerate the reaction. But some BaCO3 and m-ZrO2 appeared in other samples （x≥0.1）, which shows that press baffled the reaction. Under 3.6 GPa at1 000 ℃, the peaks of BaO appeared clearly and increased with the content of Y3+. Therefore, to synthesis cubic perovskite structure BaZr1-xYxO3 under high-pressure and high-temperature, the temperature should be below 500 ℃.
Key words: high-pressure and high-temperature synthesis, cubic perovskite, Raman spectrum, structure
中图分类号:
- O521