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Article(id=1322917104684507812, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1322917095268295267, articleNumber=null, orderNo=null, doi=10.14062/j.issn.0454-5648.20200351, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1589817600000, receivedDateStr=2020-05-19, revisedDate=1590595200000, revisedDateStr=2020-05-28, acceptedDate=null, acceptedDateStr=null, onlineDate=1793337616368, onlineDateStr=2026-10-30, pubDate=1608393600000, pubDateStr=2020-12-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1793337616368, onlineIssueDateStr=2026-10-30, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1793337616368, creator=13701087609, updateTime=1793337616368, updator=13701087609, issue=Issue{id=1322917095268295267, tenantId=1146029695717560320, journalId=1263187385517883426, year='2020', volume='48', issue='12', pageStart='1865', pageEnd='2010', issueExtLink='null', onlineDate='null', pubDate='1608393600000', pubDateStr='2020-12-20', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1793337614123, creator='13701087609', updateTime=1793345927101, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1322951962475507806, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1322917095268295267, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1322951962475507807, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1322917095268295267, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=1865, endPage=1871, ext={EN=ArticleExt(id=1322917104986497701, articleId=1322917104684507812, tenantId=1146029695717560320, journalId=1263187385517883426, language=EN, title=Effect of Sintering Aids on Thermal Conductivity and Mechanical Properties of Silicon Nitride Ceramics, columnId=null, journalTitle=Journal of the Chinese Ceramic Society, columnName=null, runingTitle=null, highlight=null, articleAbstract=

β-phase high thermal conductivity silicon nitride ceramics were prepared by sintering at 1 900 ℃ for 2 h using silicon nitride (α-phase≥95%, particle size 0.5 μm) as a raw material, and MgO-Y2O3 as a composite sintering aid. The effects of sintering aid content and ratio on the densification process, thermal conductivity, mechanical properties and microstructure of silicon nitride ceramics were discussed. The results show that when the addition amount of sintering aid is 5% MgO+4% Y2O3, the thermal conductivity, bending strength, fracture toughness of the sample sintered in air at 1 890 ℃ for 2 h can reach 85.96 W·m-1·K-1, 873 MPa and 8.39 MPa·m1/2, respectively. In the sintering process, Y2O3 reacts with Si3N4 to form a compound fixed at the grain boundary, which plays a role in purifying the silicon nitride lattice and improves the thermal conductivity of the sintered sample. Excessive MgO and Y2O3 will form compounds during the sintering process and remain at the grain boundary, which will reduce the mechanical properties and thermal conductivity of the material.

, authors=Jian LIU1, Zhipeng XIE1, Zhicai XIAO2, Yi XIAO2, authorsList=Jian LIU, Zhipeng XIE, Zhicai XIAO, Yi XIAO, authorCompany=null, correspAuthors=Zhipeng XIE, authorNote=

Liu Jian (1990-), male, Doctorial, candidate. E-mail:

, correspAuthorsNote=
XIE Zhipeng (1957-), male, Ph.D., Professor.. E-mail:
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以氮化硅（α相≥95%，平均粒径0.5 μm）为原料，添加MgO-Y2O3为复合烧结助剂，采用气压烧结技术制备了β相高导热氮化硅陶瓷。研究和讨论了烧结助剂含量和比例对氮化硅陶瓷致密化过程、热导率、力学性能和显微结构的影响。结果表明：当烧结助剂添加量为5%MgO+4%Y2O3时，使用气压烧结在1 890 ℃烧结2 h，试样的热导率可达到85.96 W·m-1K-1，抗弯强度达到873 MPa，断裂韧性为8.39 MPa·m1/2；在烧结过程中Y2O3与Si3N4反应形成化合物固定在晶界处，减少了固溶进氮化硅晶格中氧的含量，起到了净化氮化硅晶格的作用，提高了烧结试样的热导率；过量的MgO或Y2O3在烧结过程中形成的化合物残留在晶界处，降低了材料的力学性能和热导率。

, authors=刘剑1, 谢志鹏1, 肖志才2, 肖毅2, authorsList=刘剑, 谢志鹏, 肖志才, 肖毅, authorCompany=null, correspAuthors=谢志鹏, authorNote=

刘剑（1990—），男，博士研究生。

, correspAuthorsNote=
谢志鹏（1957—），男，博士，教授。
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Liu Jian (1990-), male, Doctorial, candidate. E-mail:

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Liu Jian (1990-), male, Doctorial, candidate. E-mail:

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刘剑（1990—），男，博士研究生。

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刘剑（1990—），男，博士研究生。

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烧结助剂对氮化硅陶瓷热导率和力学性能的影响
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刘剑 1 , 谢志鹏 1 , 肖志才 2 , 肖毅 2
硅酸盐学报 | 2020,48(12): 1865-1871
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硅酸盐学报 | 2020 , 48 (12) : 1865 -1871
烧结助剂对氮化硅陶瓷热导率和力学性能的影响
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刘剑1 , 谢志鹏1 , 肖志才2, 肖毅2
作者信息
  • 1．清华大学，新型陶瓷与精细工艺国家重点实验室，北京 100084
  • 2．常德科锐新材料科技有限公司，湖南 常德 415000
通讯作者:
谢志鹏（1957—），男，博士，教授。
作者简介:

刘剑（1990—），男，博士研究生。

Effect of Sintering Aids on Thermal Conductivity and Mechanical Properties of Silicon Nitride Ceramics
Jian LIU1 , Zhipeng XIE1 , Zhicai XIAO2, Yi XIAO2
Affiliations
  • 1.State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing 100084, China
  • 2.Changde Kerui new material Technology Co. Ltd., Hunan, Changde 415000, Hunan, China
    • Corresponding Author:
    XIE Zhipeng (1957-), male, Ph.D., Professor.. E-mail:

    Liu Jian (1990-), male, Doctorial, candidate. E-mail:

出版时间: 2020-12-20 doi: 10.14062/j.issn.0454-5648.20200351
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以氮化硅（α相≥95%，平均粒径0.5 μm）为原料，添加MgO-Y2O3为复合烧结助剂，采用气压烧结技术制备了β相高导热氮化硅陶瓷。研究和讨论了烧结助剂含量和比例对氮化硅陶瓷致密化过程、热导率、力学性能和显微结构的影响。结果表明：当烧结助剂添加量为5%MgO+4%Y2O3时，使用气压烧结在1 890 ℃烧结2 h，试样的热导率可达到85.96 W·m-1K-1，抗弯强度达到873 MPa，断裂韧性为8.39 MPa·m1/2；在烧结过程中Y2O3与Si3N4反应形成化合物固定在晶界处，减少了固溶进氮化硅晶格中氧的含量，起到了净化氮化硅晶格的作用，提高了烧结试样的热导率；过量的MgO或Y2O3在烧结过程中形成的化合物残留在晶界处，降低了材料的力学性能和热导率。

氮化硅  /  气压烧结  /  热导率  /  力学性能  /  显微结构

β-phase high thermal conductivity silicon nitride ceramics were prepared by sintering at 1 900 ℃ for 2 h using silicon nitride (α-phase≥95%, particle size 0.5 μm) as a raw material, and MgO-Y2O3 as a composite sintering aid. The effects of sintering aid content and ratio on the densification process, thermal conductivity, mechanical properties and microstructure of silicon nitride ceramics were discussed. The results show that when the addition amount of sintering aid is 5% MgO+4% Y2O3, the thermal conductivity, bending strength, fracture toughness of the sample sintered in air at 1 890 ℃ for 2 h can reach 85.96 W·m-1·K-1, 873 MPa and 8.39 MPa·m1/2, respectively. In the sintering process, Y2O3 reacts with Si3N4 to form a compound fixed at the grain boundary, which plays a role in purifying the silicon nitride lattice and improves the thermal conductivity of the sintered sample. Excessive MgO and Y2O3 will form compounds during the sintering process and remain at the grain boundary, which will reduce the mechanical properties and thermal conductivity of the material.

silicon nitride  /  gas press sintering  /  thermal conductivity  /  mechanical properties  /  microstructure
刘剑, 谢志鹏, 肖志才, 肖毅. 烧结助剂对氮化硅陶瓷热导率和力学性能的影响. 硅酸盐学报, 2020 , 48 (12) : 1865 -1871 . DOI: 10.14062/j.issn.0454-5648.20200351
Jian LIU, Zhipeng XIE, Zhicai XIAO, Yi XIAO. Effect of Sintering Aids on Thermal Conductivity and Mechanical Properties of Silicon Nitride Ceramics[J]. Journal of the Chinese Ceramic Society, 2020 , 48 (12) : 1865 -1871 . DOI: 10.14062/j.issn.0454-5648.20200351
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  • 国家自然科学基金(51672147)
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2020年第48卷第12期
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doi: 10.14062/j.issn.0454-5648.20200351
  • 接收时间：2020-05-19
  • 首发时间：2026-10-30
  • 出版时间：2020-12-20
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  • 收稿日期：2020-05-19
  • 修回日期：2020-05-28
基金
国家自然科学基金(51672147)
作者信息
    1．清华大学，新型陶瓷与精细工艺国家重点实验室，北京 100084
    2．常德科锐新材料科技有限公司，湖南 常德 415000

通讯作者:

谢志鹏（1957—），男，博士，教授。
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2种不同金属材料的力学参数
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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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