...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Preparation, structure and photoluminescence of nanoscaled-Nd: Lu_3Al_5O_(12)
【24h】

Preparation, structure and photoluminescence of nanoscaled-Nd: Lu_3Al_5O_(12)

机译：纳米级钕的制备，结构和光致发光：Lu_3Al_5O_（12）

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

Nd:Lu_3Al_5O_(12) (Nd:LuAG) nano-crystalline was synthesized by co-precipitation method. Its phase transformation, structure, absorption and photoluminescence properties were studied. The Nd:iuAG polycrystalline phase is formed above 900 °C and its particle sizes are in the- range of 18-36 nm. The structure of Nd:LuAG was refined by Rietveld method. The lattice parameters and the distortion of Lu~(3+)-O~(2-) polyhedron in Nd:LuAG are larger than that of in pure LuAG. Because the distortion of Lu~(3+)-O~(2-) polyhedron is larger than that of Y~(3+)-O~(2-) polyhedron in YAG and the distance of Lu~(3+)-O~(2-) is smaller than that of Y~(3+)-O~(2-) in YAG, Nd~(3+) in LuAG experiences a stronger crystal field effect, which is proved by the crystal field strength and the chemical environment parameter. The absorption spectrum shows that Nd:LuAG has a broad absorption band at 808 nm with FWHM above 6 nm, which is favorable for improving laser efficiency. The fluorescence lifetime from ~4F_(3/2) -> ~4I_(11/2) transition is 320 its and longer than that of Nd:YAG. The longer lifetime is propitious to energy storage. The emission cross section at 1064nm is 2.89 x 10~~(-19) cm~2, taking into account the Boltzmann distribution af the excited state. The emission cross section in Nd:LuAG is also larger than that of Nd:YAG, which is useful for laser operation. All results indicate that Nd:LuAG is a promising crystal material to apply in high energy lasers.
机译：通过共沉淀法合成了Nd：Lu_3Al_5O_（12）（Nd：LuAG）纳米晶体。研究了其相变，结构，吸收和光致发光性能。 Nd：iuAG多晶相在900°C以上形成，其粒径在18-36 nm范围内。 Nd：LuAG的结构通过Rietveld方法精制。 Nd：LuAG中Lu〜（3 +）-O〜（2-）多面体的晶格参数和畸变大于纯LuAG中的Lu〜（3 +）-O〜（2-）多面体。因为YAG中Lu〜（3 +）-O〜（2-）多面体的畸变大于Y〜（3 +）-O〜（2-）多面体的畸变，且Lu〜（3 +）-的距离YAG中的O〜（2-）比Y〜（3 +）-O〜（2-）小，LuAG中的Nd〜（3+）经历更强的晶场效应，这由晶场强度证明以及化学环境参数。吸收光谱表明，Nd：LuAG在808nm处具有较宽的吸收带，且FWHM高于6nm，这对于提高激光效率是有利的。从〜4F_（3/2）->〜4I_（11/2）跃迁开始的荧光寿命为320倍，比Nd：YAG更长。较长的使用寿命有利于能量存储。考虑到激发态的玻耳兹曼分布，在1064nm处的发射截面为2.89 x 10〜（-19）cm〜2。 Nd：LuAG中的发射横截面也大于Nd：YAG的发射横截面，这对于激光操作很有用。所有结果表明，Nd：LuAG是一种有前途的晶体材料，可用于高能激光器。

著录项

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