...
首页> 外文期刊>Optical Materials >Physical and spectroscopic properties of multi-component Na2O-PbO-Bi2O3-SiO2 glass ceramics with Cr2O3 as nucleating agent
【24h】

Physical and spectroscopic properties of multi-component Na2O-PbO-Bi2O3-SiO2 glass ceramics with Cr2O3 as nucleating agent

机译:以Cr2O3为成核剂的多组分Na2O-PbO-Bi2O3-SiO2玻璃陶瓷的物理和光谱性质

获取原文
获取原文并翻译 | 示例
           

摘要

Transparent glass ceramics, synthesized from melt quenching followed by heat treatment, of the composition 10Na(2)O-30PbO-10Bi(2)O(3)-(50 - x)SiO2:xCr(2)O(3) (mol%), where 0 <= x <= 0.5, were characterized with XRD, DTA, SEM and EDS. Physical and spectroscopic studies, viz., optical absorption, electron paramagnetic resonance (EPR), FTIR and Raman were investigated. The characterization of the host glass ceramic has revealed that the formation of a major phase of sodium silicate along with two minor phases such as lead silicate and bismuth oxide. By integrating Cr2O3 to the host glass additional crystal phases viz., NaCrO2, Na2Cr2O7 and Pb(CrO4) which are the complexes of Cr3+ and Cr6+ ions were also developed. As the concentration of nucleating agent is increased, a part of the Cr6+ ions is found to reduce in to Cr3+ ions. Spectroscopic studies have revealed that with an increase in the concentration of Cr2O3 from 0.1 to 0.5 mol%, there is a gradual increase in the intensity of vibrational modes of various asymmetric structural units of silicate, bismuthate and chromate in the glass ceramic network at the expense of symmetrical structural units. The analysis of the results of these studies has indicated that in the samples containing higher concentration of Cr2O3, chromium ions exists predominantly in Cr3+ state and occupy the octahedral positions in glass ceramic matrix and such glass ceramic samples are suitable for lasing action. (C) 2015 Elsevier B.V. All rights reserved.
机译:透明玻璃陶瓷,由熔体淬火和热处理合成而成,组成为10Na(2)O-30PbO-10Bi(2)O(3)-(50-x)SiO2:xCr(2)O(3)(mol用XRD,DTA,SEM和EDS对0 <= x <= 0.5的%)进行表征。进行了物理和光谱研究,即光吸收,电子顺磁共振(EPR),FTIR和拉曼光谱。基质玻璃陶瓷的特征表明,硅酸钠的主要相与硅酸铅和氧化铋之类的两个次要相一起形成。通过将Cr2O3集成到主体玻璃中,还开发了另外的晶体相,即Cr3 +和Cr6 +离子的络合物NaCrO2,Na2Cr2O7和Pb(CrO4)。随着成核剂浓度的增加,发现一部分Cr6 +离子还原成Cr3 +离子。光谱学研究表明,随着Cr2O3浓度从0.1摩尔%增加到0.5摩尔%,玻璃陶瓷网络中各种不对称结构的硅酸盐,铋酸盐和铬酸盐的振动模态强度逐渐增加。对称的结构单元。对这些研究结果的分析表明,在含有较高浓度Cr2O3的样品中,铬离子主要以Cr3 +状态存在,并占据了玻璃陶瓷基体的八面体位置,这种玻璃陶瓷样品适合于激光作用。 (C)2015 Elsevier B.V.保留所有权利。

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