• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Applied Surface Science >The improvement of moisture resistance and thermal stability of Ca_3SiO_4Cl2:Eu~(2+) phosphor coated with SiO_2
【24h】

The improvement of moisture resistance and thermal stability of Ca_3SiO_4Cl2:Eu~(2+) phosphor coated with SiO_2

机译：SiO_2包覆Ca_3SiO_4Cl2：Eu〜（2+）荧光粉的耐湿性和热稳定性的改善

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Green-emitting phosphors Ca_3SiO_4Cl_2:Eu~(2+) were prepared by the high temperature solid-state method. Sol-gel process was adopted to encapsulate the as-prepared phosphors with tetraethylorthosilicate (TEOS) as silicon coating reagent. Fluorescence spectrometer, scanning electron microscopy (SEM) and powder X-ray diffraction (XRD) patterns were employed to characterize the emission spectra, the surface morphologies and the phase structures, respectively. The chemical stability testing was operated by the method of soaking the phosphors in deionized water and roasting them at different temperatures. The results indicated that the surfaces of the green phosphors were evenly coated by SiO_2 and the phase structure of the coated phosphors remained the same as the uncoated samples. The luminance centre of Eu~(2+) did not shift after surface treatment and the luminance intensity of coated phosphors was lower than that of the uncoated samples. The results demonstrated that the water-resistance stability of the coated phosphor was improved to some degree because the pH value and the luminance intensity variation were both smaller than the uncoated phosphor after steeping within the same time. Moreover, the thermal stability of coated phosphors was enhanced obviously compared to the original samples based on the temperature dependent emission spectra measurement.
机译：通过高温固态法制备了绿色荧光粉Ca_3SiO_4Cl_2：Eu〜（2+）。采用溶胶-凝胶法以原硅酸四乙酯（TEOS）为包覆剂，封装了所制备的荧光粉。分别采用荧光光谱仪，扫描电子显微镜（SEM）和粉末X射线衍射（XRD）图谱表征发射光谱，表面形貌和相结构。化学稳定性测试通过将磷光体浸泡在去离子水中并在不同温度下烘烤的方法进行。结果表明，绿色荧光粉的表面均匀地被SiO_2覆盖，并且涂层荧光粉的相结构与未涂层样品相同。表面处理后，Eu〜（2+）的亮度中心不发生偏移，涂覆的荧光粉的亮度强度低于未涂覆的样品。结果表明，涂​​覆后的磷光体的耐水性稳定性有所提高，这是因为pH值和亮度强度变化都比同时浸渍后未涂覆的磷光体小。而且，基于温度依赖性发射光谱测量，与原始样品相比，涂覆的磷光体的热稳定性明显提高。

著录项

  • 来源
    《Applied Surface Science》 |2011年第9期|p.4350-4353|共4页
  • 作者

    Jiaqing Zhuang; Zhiguo Xia; Haikun Liu; Zepeng Zhang; Libing Liao;

  • 作者单位

    School of Materials Sciences and Technology, China University of Ceosciences, Beijing 100083, PR China;

    School of Materials Sciences and Technology, China University of Ceosciences, Beijing 100083, PR China;

    School of Materials Sciences and Technology, China University of Ceosciences, Beijing 100083, PR China;

    School of Materials Sciences and Technology, China University of Ceosciences, Beijing 100083, PR China;

    School of Materials Sciences and Technology, China University of Ceosciences, Beijing 100083, PR China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Phosphor,SiO_2 coating,Chemical stability,pH value;

    机译：磷;SiO_2涂层;化学稳定性;pH值;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号