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Effect of MgSiN2-Y2O3 Sintering Aids on Mechanical Properties and Thermal Conductivity of Si3N4 Ceramics
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Cong LI1, Bo ZHANG1, Jiabin HU1, Shenghe WANG2, Zhongqi SHI1
Journal of the Chinese Ceramic Society | 2021, 49(12) : 2556 - 2562
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Journal of the Chinese Ceramic Society | 2021, 49(12): 2556-2562
• Special Topic on Engineering Ceramic Material •
Effect of MgSiN2-Y2O3 Sintering Aids on Mechanical Properties and Thermal Conductivity of Si3N4 Ceramics
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Cong LI1, Bo ZHANG1, Jiabin HU1, Shenghe WANG2, Zhongqi SHI1
Affiliations
  • 1.State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China
  • 2.State Grid Anhui Electric Power Co., LTD, Hefei 230061, China

    • LI Cong(1995-), male, Master candidate. E-mail:

About Author:

LI Cong(1995-), male, Master candidate. E-mail:

Published: 2021-12-20 doi: 10.14062/j.issn.0454-5648.20210534
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Si3N4 ceramics were prepared via gas pressure sintering under nitrogen pressure of 1.0 MPa at 1 850℃ for 3 h with Y2O3 and MgSiN2 as sintering aids. The effects of MgSiN2/Y2O3 mole ratio and their total amount on the porosity, microstructure, mechanical properties and thermal conductivity of Si3N4 ceramics were investigated. The results show that the growth of rod-like β-Si3N4 grains was more sufficient and the growth of abnormal grain decreased with the increase of Y2O3 content at the constant total content of MgSiN2 and Y2O3. Si3N4 ceramics with the optimal properties were prepared at a molar ratio of MgSiN2:Y2O3 of 5∶2 and the total amount of sintering aids of 10.5%, having the bending strength and thermal conductivity of 510 MPa and 67.01 W·m-1·K-1, respectively.

silicon nitride  /  sintering aids  /  fracture strength  /  thermal conductivity
李聪, 张博, 胡加斌, 汪胜和, 史忠旗. MgSiN2-Y2O3复合烧结助剂对Si3N4陶瓷力学及导热性能的影响. 硅酸盐学报, 2021 , 49 (12) : 2556 -2562 . DOI: 10.14062/j.issn.0454-5648.20210534
Cong LI, Bo ZHANG, Jiabin HU, Shenghe WANG, Zhongqi SHI. Effect of MgSiN2-Y2O3 Sintering Aids on Mechanical Properties and Thermal Conductivity of Si3N4 Ceramics[J]. Journal of the Chinese Ceramic Society, 2021 , 49 (12) : 2556 -2562 . DOI: 10.14062/j.issn.0454-5648.20210534
Appendix
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Year 2021 volume 49 Issue 12
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Article Info
doi: 10.14062/j.issn.0454-5648.20210534
  • Receive Date：2021-07-01
  • Online Date：2026-10-30
  • Published：2021-12-20
Article Data
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History
  • Received：2021-07-01
  • Revised：2021-09-18
Funding
Affiliations
    1.State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China
    2.State Grid Anhui Electric Power Co., LTD, Hefei 230061, China

Corresponding:

SHI Zhongqi (1982-), male, Ph.D., Professor. E-mail:
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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