自然科学版
陕西师范大学学报(自然科学版)
电介质物理和材料专刊
LiBiO2掺杂提升铌酸钾钠基无铅陶瓷透光率的研究
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丁喜,彭战辉,张福东,聂欣茹,晁小练,杨祖培*
(陕西师范大学 材料科学与工程学院,陕西 西安 710119)
杨祖培,女,教授,博士生导师,主要研究方向为功能陶瓷材料。E-mail:yangzp@snnu.edu.cn
摘要:
为提升铌酸钾钠基无铅陶瓷的透光率,使用传统固相法制备了0.95(K1/2Na1/2)NbO3-0.05Ba(Zn1/3Nb2/3)O3-x mol% LiBiO2(简称0.95KNN-0.05BZN-x% LB)透明陶瓷,对其透光率进行表征。结果发现:当x=1时,陶瓷的透光率最高(65%,780 nm);而当掺杂量继续增加时,陶瓷内部气孔开始增多,透光率逐渐下降。结果表明,适量LiBiO2的引入不仅降低陶瓷的气孔率,而且增大晶粒尺寸,减少由气孔和晶界产生的光散射,有效提升陶瓷的透光率。
关键词:
铌酸钾钠基透明陶瓷;微观结构;晶粒尺寸;块体密度
收稿日期:
2021-03-03
中图分类号:
TM282
文献标识码:
A
文章编号:
1672-4291(2021)04-0086-05
基金项目:
国家自然科学基金(51872177)
Doi:
Improved transmittance realized in potassium sodium niobatebased lead free ceramics via LiBiO2 modification
DING Xi, PENG Zhanhui, ZHANG Fudong, NIE Xinru, CHAO Xiaolian, YANG Zupei*
(School of Materials Science and Engineering, Shaanxi Normal University,Xi′an 710119, Shaanxi, China)
Abstract:
In order to improve the transmittance of potassium sodium niobate based lead free ceramics, a series of 0.95(K1/2Na1/2)NbO3-0.05Ba(Zn1/3Nb2/3)O3-x mol %LiBiO2(0.95KNN-0.05BZN-x mol%LB) transparent ceramics were prepared by a traditional solid-state method and the transmittance was characterized. It was found that when x=1, the transmittance of ceramics was the highest (65%, 780 nm), while the porosity began to increase and the transmittance gradually decreased when the doping amount continued to increase. The results indicated that the introduction of LiBiO2 not only reduces the porosity of ceramics, but also increases the grain size, reducing the light scattering from pores and grain boundaries, and effectively improves the transmittance of ceramics.
KeyWords:
niobate based lead free ceramics; microstructure; grain size; bulk density