...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Synthesis and thermal characterization of glass bonded Ca-chloroapatite matrices for pyrochemical chloride waste immobilization
【24h】

Synthesis and thermal characterization of glass bonded Ca-chloroapatite matrices for pyrochemical chloride waste immobilization

机译：用于热化学氯化物废物固定化的玻璃键合钙-氯磷灰石基质的合成和热表征

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

Ca-chloroapatite (CaApCl), glass-bonded CaApCl compositions loaded with 16-32 wt.% simulated pyrochemical chloride waste were prepared by mixing and heating (773-1023 K) apatite and borosilicate glass (BSG) forming reagents in appropriate ratios. The compositions were characterized by XRD, TGA/DTA, SEM, and EDAX. Among the products, 16-27 wt.% chloride waste loaded composition yielded phase pure Ca-chloroapatite and were resistant to leaching of Cl - and other ions. In case of 28-32 wt.% waste loaded compositions, even though formation of phase pure Ca-Chloroapatites was observed by XRD, the leaching of Cl ~- and other ions was found to be significant. Bulk thermal expansion behavior of the samples was studied by dilatometry. The 16 wt.% chloride waste loaded matrix showed nearly the same thermal expansion compared to pure Ca-Chloroapatites. The % linear thermal expansion of the matrices decrease on increasing the chloride waste loading; however, Ca-chloroapatite mixed with 20 wt.% BSG mixed matrix showed slightly higher thermal expansion. The coefficient of thermal expansion of borosilicate glass is the lowest among all the matrices measured. The coefficient of thermal expansion (CTE) is found to be 12.76 ± 0.64 × 10 ~(- 6) K ~(- 1) for CaApl and 12.18 ± 0.63 × 10 ~(- 6) K ~(- 1) for 16 wt.% waste loaded BSG-encapsulated CaApl in the temperature range of 298-780 K. The glass transition temperature of the waste loaded matrices is lower than that of the bare BSG and 20 wt.% BSG encapsulated Ca-chloroapatite.
机译：通过以适当的比例混合和加热（773-1023 K）磷灰石和硼硅酸盐玻璃（BSG）形成试剂来制备Ca-氯磷灰石（CaApCl），负载有16-32 wt％的模拟热化学氯化物废物的玻璃结合的CaApCl组合物。通过XRD，TGA / DTA，SEM和EDAX对组合物进行表征。在这些产物中，负载有16-27重量％的氯化物废物的组合物产生相纯的Ca-氯磷灰石，并且抗Cl-和其他离子的浸出。在载有28-32重量％废物的组合物的情况下，即使通过XRD观察到形成了相纯的Ca-氯磷灰石，也发现Cl-和其他离子的浸出是显着的。通过膨胀法研究了样品的体热膨胀行为。与纯Ca-氯磷灰石相比，负载了16 wt％氯离子的基质显示出几乎相同的热膨胀。基质的线性热膨胀％随着氯离子废物量的增加而降低;然而，与20重量％BSG混合基质混合的Ca-氯磷灰石显示出稍高的热膨胀。在所有测得的基质中，硼硅酸盐玻璃的热膨胀系数最低。发现CaApl的热膨胀系数（CTE）为12.76±0.64×10〜（-6）K〜（-1），16 wt％为12.18±0.63×10〜（-6）K〜（-1）在298-780K的温度范围内，0.1％的废物负载的BSG包封的CaApl。废物的负载基质的玻璃化转变温度低于裸BSG和20重量％的BSG包裹的Ca-氯磷灰石的玻璃化转变温度。

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