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Preparation of High Thermal Conductivity Silicon Nitride Ceramic by Aqueous Gel-Casting
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Yunlong TIAN, Hai QI, Peizhi ZHANG, Fangquan GUO, Weiyue HAN
Journal of the Chinese Ceramic Society | 2022, 50(9) : 2351 - 2357
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Journal of the Chinese Ceramic Society | 2022, 50(9): 2351-2357
• Research Articles •
Preparation of High Thermal Conductivity Silicon Nitride Ceramic by Aqueous Gel-Casting
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Yunlong TIAN, Hai QI, Peizhi ZHANG, Fangquan GUO, Weiyue HAN
Affiliations
  • Shanghai Key Laboratory of Engineering Materials Application and Evaluation, Shanghai Research Institute of Materials, Shanghai 200437, China

    • TIAN Yunlong (1995-), male, Master candidate. E-mail:

About Author:

TIAN Yunlong (1995-), male, Master candidate. E-mail:

Published: 2022-09-20 doi: 10.14062/j.issn.0454-5648.20211134
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High thermal conductivity silicon nitride ceramics were prepared via aqueous gel-casting with a slurry of a low viscosity. The effect of MgO sintering aid on the rheological properties of slurry and the thermal conductivity of silicon ceramics was investigated. The results show that MgO sintering aid causes the particles aggregation and increases the slurry viscosity. The slurry viscosity becomes sensitive to the pH value change when the addition amount of MgO increases. A ceramic slurry with a low viscosity is achieved by adjusting pH value and dispersant concentration. The thermal conductivity, bending strength, and fracture toughness of the sample prepared by aqueous gel-casting can reach 83.7 W·m-1·K-1, 945 MPa, and 8.4 MPa·m1/2, respectively. The feasibility of high thermal conductivity silicon nitride ceramics prepared by aqueous gel-casting was verified.

silicon nitride  /  aqueous gel-casting  /  viscosity  /  magnesium oxide  /  thermal conductivity
田云龙, 祁海, 张培志, 郭方全, 韩伟月. 水基凝胶注模制备高导热氮化硅陶瓷. 硅酸盐学报, 2022 , 50 (9) : 2351 -2357 . DOI: 10.14062/j.issn.0454-5648.20211134
Yunlong TIAN, Hai QI, Peizhi ZHANG, Fangquan GUO, Weiyue HAN. Preparation of High Thermal Conductivity Silicon Nitride Ceramic by Aqueous Gel-Casting[J]. Journal of the Chinese Ceramic Society, 2022 , 50 (9) : 2351 -2357 . DOI: 10.14062/j.issn.0454-5648.20211134
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Year 2022 volume 50 Issue 9
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Article Info
doi: 10.14062/j.issn.0454-5648.20211134
  • Receive Date：2021-12-24
  • Online Date：2026-10-20
  • Published：2022-09-20
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History
  • Received：2021-12-24
  • Revised：2022-01-12
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Affiliations
    Shanghai Key Laboratory of Engineering Materials Application and Evaluation, Shanghai Research Institute of Materials, Shanghai 200437, China

Corresponding:

ZHANG Peizhi (1962-), male, Professorate senior Engineer. 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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