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激光烧结Sr_(1.86)Ca_(0.14)NaNb_5O_(15)无Pb压电陶瓷
  • 期刊名称：光电子.激光
  • 时间：0
  • 页码：1037-1040
  • 语言：中文
  • 分类：TM282[电气工程—电工理论与新技术;一般工业技术—材料科学与工程]
  • 作者机构：[1]北京工业大学激光工程研究院
  • 相关基金：国家自然科学基金资助项目(10674014);; 北京市科技新星计划资助项目(2006B11)
  • 相关项目：激光离散通孔密排实现陶瓷厚件无损切割的基础研究
作者： 季凌飞|蒋毅坚|杜新宇|
关键词： 激光烧结, Sr1.86Ca0.14NaNb5O15(SCNN), 无Pb压电陶瓷, 介电性能, 压电性能, laser sintering, Sr1.86Ca0.14NaNb5O15（SCNN）, lead-free piezoelectric ceramics, dielectric properties, piezoelectric properties
中文摘要：

采用激光烧结技术,制备出相对密度为97.5%的Sr1.86Ca0.14NaNb5O15(SCNN)无Pb压电陶瓷。最佳烧结条件为:激光烧结功率密度为1.99W/mm2;激光烧结时间为60s;激光功率密度升降速率为0.50W/mm2.min。与传统炉烧SCNN陶瓷相比,激光烧结SCNN陶瓷室温下1MHz的介电常数κ从1312增长到1419,机电耦合系数k33从17%增长到了27%,压电常数d33从60pC/N提高到93pC/N。扫描电镜(SEM)观测发现:与传统炉烧陶瓷相比,激光烧结SCNN陶瓷的晶粒尺寸较小,气孔较少,Na挥发较少;陶瓷片的X射线衍射(XRD)分析表明,激光烧结陶瓷的晶粒具有一定程度的取向生长。

英文摘要：

The lead-free tungsten bronze Sr1.86Ca0.14NaNb5O15(SCNN)ceramics with a relative density of 97.5% have been prepared successfully by CO2 laser sintering.The optimized process parameters are laser sintering power density 1.99 W/mm2,laser sintering time 60 s,and raising/falling rate of laser power density 0.50 W/mm2·min.Compared with the furnace sintered sample,the dielectric permittivity at room temperature and 1 MHz of SCNN ceramics is enhanced from 1312 to 1419,the electromechanical coupling coefficient k3...

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