Journal of Inorganic Materials ›› 2018, Vol. 33 ›› Issue (6): 688-692.doi: 10.15541/jim20170495

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Thermal Property of Y4.67(SiO4)3O Ceramic Sintered from Hydrothermally Synthesized Spindle-like Y4.67(SiO4)3O Apatite Crystallites

Qing-Gang WANG1, Jian-Feng HUANG1(), Lei ZHOU1,2, Wan-Chen WU1, Li-Yun CAO1   

  1. 1. School of Material Science and Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China;
    2. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China;
  • Received:2017-10-20 Online:2018-06-20 Published:2018-05-24
  • About author:WANG Qing-Gang (1978-), male, candidate of PhD. E-mail:
  • Supported by:
    Foundation item: National Natural Science Foundation of China (51272146);Innovation Team Assistance Foundation of Shaanxi Province (2013KCT-06);Graduate Innovation Foundation of Shaanxi University of Science and Technology


Spindle-like Y4.67(SiO4)3O apatite crystallites composed of numerous nanoparticles with a mean diameter of about 50 nm were synthesized via a facile hydrothermal method at 503 K for 12 h. To the best of our knowedge, the thermal properties of the spindle-like Y4.67(SiO4)3O apatite crystallites was firstly reported. Their phase composition, microstructure, formation mechanism were investigated. Results show that hydrothermal temperature greatly influences the crystal phase composition and the crystal morphology. In addition, the obtained Y4.67(SiO4)3O ceramics possess low thermal conductivity and a relatively high thermal expansion coefficient, which make them a promising candidate material for environmental/thermal barrier coatings.

Key words: ceramics, Y4.67(SiO4)3O apatite crystallites, thermal properties

CLC Number: 

  • TQ174