水热法制备纺锤型磷灰石相Y4.67(SiO4)3O微晶及其陶瓷的热学性能研究

doi:10.15541/jim20170495

无机材料学报 ›› 2018, Vol. 33 ›› Issue (6): 688-692.DOI: 10.15541/jim20170495 CSTR: 32189.14.10.15541/jim20170495

水热法制备纺锤型磷灰石相Y_4.67(SiO₄)₃O微晶及其陶瓷的热学性能研究

汪庆刚¹, 黄剑锋¹, 周磊^1,2, 仵婉晨¹, 曹丽云¹

1. 陕西科技大学材料科学与工程学院,西安 710021;
2. 西北工业大学凝固技术国家重点实验室,西安 710072;

收稿日期:2017-10-20 出版日期:2018-06-20 网络出版日期:2018-05-24
作者简介:汪庆刚. E-mail: 17156587@qq.com

Thermal Property of Y_4.67(SiO₄)₃O Ceramic Sintered from Hydrothermally Synthesized Spindle-like Y_4.67(SiO₄)₃O Apatite Crystallites

WANG Qing-Gang¹, HUANG Jian-Feng¹, ZHOU Lei^1,2, WU Wan-Chen¹, CAO Li-Yun¹

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 Published:2018-06-20 Online:2018-05-24
About author:WANG Qing-Gang (1978-), male, candidate of PhD. E-mail: 17156587@qq.com
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

摘要/Abstract

摘要：

采用水热法在温度为503 K,反应时间为12 h的条件下制备了纺锤型磷灰石相Y_4.67(SiO₄)₃O微晶,该微晶由粒径约为50 nm的颗粒组成。首次报道了纺锤型磷灰石相Y_4.67(SiO₄)₃O微晶的热性能,同时研究了其相组成,微观结构及合成机理。结果表明,水热温度对所制备粉体的相组成及形貌有较大影响。此外,对应的陶瓷具有较低的热导率和较高的热膨胀系数,有望用作热障/环障涂层材料。

关键词: 陶瓷, 磷灰石相Y_4.67(SiO₄)₃O微晶, 热学性能

Abstract:

Spindle-like Y_4.67(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 Y_4.67(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 Y_4.67(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, Y_4.67(SiO₄)₃O apatite crystallites, thermal properties

中图分类号:

TQ174

汪庆刚, 黄剑锋, 周磊, 仵婉晨, 曹丽云. 水热法制备纺锤型磷灰石相Y_4.67(SiO₄)₃O微晶及其陶瓷的热学性能研究[J]. 无机材料学报, 2018, 33(6): 688-692.

WANG Qing-Gang, HUANG Jian-Feng, ZHOU Lei, WU Wan-Chen, CAO Li-Yun. Thermal Property of Y_4.67(SiO₄)₃O Ceramic Sintered from Hydrothermally Synthesized Spindle-like Y_4.67(SiO₄)₃O Apatite Crystallites[J]. Journal of Inorganic Materials, 2018, 33(6): 688-692.

图/表 4

Fig. 1 XRD patterns of Y4.67(SiO4)3O at different temperatures after reaction for 12 h

Fig. 2 SEM images of the products synthesized at different temperatures(a) 483 K; (b) 493 K; (c) 503 K; (d) EDS analysis spectrum of the Y4.67(SiO4)3O; (e) Schematic diagram of the growth process of the spindle-like Y4.67(SiO4)3O apatite crystallites

Fig. 3 TEM images of Y4.67(SiO4)3O. (a) Typical TEM image; (b) Magnified image of (a); (c) High-resolution TEM image of a part of the sample; (d) Selected area electronic diffraction (SAED) pattern of (c)

Fig. 4 Thermal properties of the sample. (a) TG-DSC curves of the Y4.67(SiO4)3O powders prepared at 503 K for 12 h; (b) XRD patterns of the sample (I) before and (II) after sintering in air for 5 h at 1673 K; (c) Microstructure of the surface of Y4.67(SiO4)3O after sintering in air for 5 h at 1673 K; (d) Thermal conductivity of Y4.67(SiO4)3O ceramics; (e) Thermal expansion coefficients of Y4.67(SiO4)3O ceramics

参考文献 17

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水热法制备纺锤型磷灰石相Y_4.67(SiO₄)₃O微晶及其陶瓷的热学性能研究

Thermal Property of Y_4.67(SiO₄)₃O Ceramic Sintered from Hydrothermally Synthesized Spindle-like Y_4.67(SiO₄)₃O Apatite Crystallites

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