• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>European Journal of Glass Science and Technology, PartB. Physics and Chemistry of Glasses >Influence of Ta2O5 addition on the crystallisation behaviour of a bioactive glass (AP40)
【24h】

Influence of Ta2O5 addition on the crystallisation behaviour of a bioactive glass (AP40)

机译：Ta2O5的添加对生物活性玻璃（AP40）结晶行为的影响

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

Differential thermal analysis (DTA), x-ray diffraction (XRD) and scanning electron microscopy (SEM) were employed to study crystallisation of AP40 and RKKP glassy materials. Weight compositions of both glasses are very close to the Ilmaplantparent glass: SiO_2=44-00; CaO=32-16; MgO=2-84; CaF_2=5-00; Na_2O=4-60; K_2O=0-20; P_2O_5=11-20 for AP40 and SiO_2= 43-84; CaO=31-93; MgO=2-79; CaF_2-4-94; Na_2O=4-55; K_2O=0-19; P_2O_5=10-27; Ta_2O_5=0-99; La_2O_3=0-50 for RKKP. Crystallised AP40 and RKKP consist of wollastonite and fluoroapatile nanocrystals, not larger than 500 nm. Wollastonite crystallises by a mechanism of surface nucleation. Crystallisation is preceded by glass-in-glass phase separation into phosphate and silicate glassy phases. The glass-in-glass phase separation is finer in RKKP. The experimental results suggest that Ta_2O_5, present only in the RKKP glass composition, catalyses the nucleation of the phosphate glassy phase.
机译：差热分析（​​DTA），X射线衍射（XRD）和扫描电子显微镜（SEM）用于研究AP40和RKKP玻璃态材料的结晶。两种玻璃的重量组成都非常接近Ilmaplantparent玻璃：SiO_2 = 44-00; CaO = 32-16; MgO = 2-84; CaF_2 = 5-00; Na_2O = 4-60; K_2O = 0-20;对于AP40，P_2O_5 = 11-20，并且SiO_2 = 43-84; CaO = 31-93; MgO = 2-79; CaF_2-4-94; Na_2O = 4-55; K_2O = 0-19; P_2O_5 = 10-27; Ta_2O_5 = 0-99;对于RKKP，La_2O_3 = 0-50。结晶的AP40和RKKP由硅灰石和含氟的纳米晶体组成，不大于500 nm。硅灰石通过表面成核机制结晶。在结晶之前，玻璃中玻璃相分离成磷酸盐和硅酸盐玻璃相。 RKKP中的玻璃中玻璃相分离更精细。实验结果表明，仅存在于RKKP玻璃组合物中的Ta_2O_5催化了磷酸盐玻璃态相的成核。

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