中国物理B ›› 2019, Vol. 28 ›› Issue (7): 78107-078107.doi: 10.1088/1674-1056/28/7/078107

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇    下一篇

Effects of CeO2 and nano-ZrO2 agents on the crystallization behavior and mechanism of CaO-Al2O3-MgO-SiO2-based glass ceramics

Yan Zhang(张艳), Yu Shi(石钰), Xuefeng Zhang(张雪峰), Fengxia Hu(胡凤霞), Jirong Sun(孙继荣), Tongyun Zhao(赵同云), Baogen Shen(沈保根)   

  1. 1 State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    2 University of Chinese Academy of Sciences, Beijing 100049, China;
    3 Key Laboratory of Integrated Exploitation of Bayan Obo Multi-Metal Resources, Inner Mongolia University of Science and Technology, Baotou 014010, China
  • 收稿日期:2019-03-06 修回日期:2019-04-19 出版日期:2019-07-05 发布日期:2019-07-05
  • 通讯作者: Baogen Shen E-mail:shenbaogen@yeah.net
  • 基金资助:

    Project supported by the National Natural Sciences Foundation of China (Grant No. 51590881), the National Key Research Program of China (Grant No. 2016YFB0700903), the Inner Mongolia Science and Technology Major Project of China 2016, and the Fujian Institute of Innovation, Chinese Academy of Sciences (Grant No. FJCXY18040302).

Effects of CeO2 and nano-ZrO2 agents on the crystallization behavior and mechanism of CaO-Al2O3-MgO-SiO2-based glass ceramics

Yan Zhang(张艳)1,2, Yu Shi(石钰)3, Xuefeng Zhang(张雪峰)3, Fengxia Hu(胡凤霞)1,2, Jirong Sun(孙继荣)1,2, Tongyun Zhao(赵同云)1,2, Baogen Shen(沈保根)1,2   

  1. 1 State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    2 University of Chinese Academy of Sciences, Beijing 100049, China;
    3 Key Laboratory of Integrated Exploitation of Bayan Obo Multi-Metal Resources, Inner Mongolia University of Science and Technology, Baotou 014010, China
  • Received:2019-03-06 Revised:2019-04-19 Online:2019-07-05 Published:2019-07-05
  • Contact: Baogen Shen E-mail:shenbaogen@yeah.net
  • Supported by:

    Project supported by the National Natural Sciences Foundation of China (Grant No. 51590881), the National Key Research Program of China (Grant No. 2016YFB0700903), the Inner Mongolia Science and Technology Major Project of China 2016, and the Fujian Institute of Innovation, Chinese Academy of Sciences (Grant No. FJCXY18040302).

摘要:

The crystallization behavior and mechanism of CaO-Al2O3-MgO-SiO2 (CAMS)-based diopside glass ceramics with nano-ZrO2 nucleators and CeO2 agents have been investigated. The use of nanoscale ZrO2 as nucleators is favorable to the crystallization of glass ceramic at a relatively lower temperature due to the reduction of the activation energy, while the activation energy is increased after adding the CeO2 agent. The microstructure and orientation have been analyzed by scanning electron microscopy and electron backscatter diffraction. Two discernible layers are observed, featured in glass and crystalline phases, respectively. Remarkably textured polycrystalline diopsides are verified for the samples (A and B) free of CeO2 agents, with c-axes perpendicular to the interface of the two layers. Comparatively, the c-axes of diopside grains of the sample (C) with CeO2 agents are proved to be parallel to the interface. Nanocrystals are detected in the vicinity of the interface for sample C.

关键词: activation energy, orientation, nanocrystalline, diopside

Abstract:

The crystallization behavior and mechanism of CaO-Al2O3-MgO-SiO2 (CAMS)-based diopside glass ceramics with nano-ZrO2 nucleators and CeO2 agents have been investigated. The use of nanoscale ZrO2 as nucleators is favorable to the crystallization of glass ceramic at a relatively lower temperature due to the reduction of the activation energy, while the activation energy is increased after adding the CeO2 agent. The microstructure and orientation have been analyzed by scanning electron microscopy and electron backscatter diffraction. Two discernible layers are observed, featured in glass and crystalline phases, respectively. Remarkably textured polycrystalline diopsides are verified for the samples (A and B) free of CeO2 agents, with c-axes perpendicular to the interface of the two layers. Comparatively, the c-axes of diopside grains of the sample (C) with CeO2 agents are proved to be parallel to the interface. Nanocrystals are detected in the vicinity of the interface for sample C.

Key words: activation energy, orientation, nanocrystalline, diopside

中图分类号:  (Glasses (including metallic glasses))

  • 81.05.Kf
81.05.Pj (Glass-based composites, vitroceramics)