Article(id=1322943498613301855, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1322942780003201932, articleNumber=null, orderNo=null, doi=10.14062/j.issn.0454-5648.20200977, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1609171200000, receivedDateStr=2020-12-29, revisedDate=1618416000000, revisedDateStr=2021-04-15, acceptedDate=null, acceptedDateStr=null, onlineDate=1793343909171, onlineDateStr=2026-10-30, pubDate=1632067200000, pubDateStr=2021-09-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1793343909171, onlineIssueDateStr=2026-10-30, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1793343909171, creator=13701087609, updateTime=1793343909171, updator=13701087609, issue=Issue{id=1322942780003201932, tenantId=1146029695717560320, journalId=1263187385517883426, year='2021', volume='49', issue='9', pageStart='1785', pageEnd='2044', issueExtLink='null', onlineDate='null', pubDate='1632067200000', pubDateStr='2021-09-20', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1793343737841, creator='13701087609', updateTime=1793345873558, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1322951737916665918, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1322942780003201932, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1322951737916665919, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1322942780003201932, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=1935, endPage=1942, ext={EN=ArticleExt(id=1322943498856571488, articleId=1322943498613301855, tenantId=1146029695717560320, journalId=1263187385517883426, language=EN, title=Crystalline Structure, Vibrational Spectra and Intrinsic Dielectric Properties of MgO·1.15Ga2O3 Ceramic, columnId=1319726165087077079, journalTitle=Journal of the Chinese Ceramic Society, columnName=Research Article, runingTitle=null, highlight=null, articleAbstract=

Magnesium gallate spinel ceramic is a promising candidate material for communication system devices due to its unique microwave dielectric properties. In this work, a pure phase MgO·1.15Ga2O3 ceramic powder with the uniform and fine particle size was synthesized via solid-state reaction. The crystal structure of synthesized powder was determined by X-ray diffraction, showing that the structure is (Mg0.118Ga0.882)IV[Mg0.781Ga1.185□0.033]VIO4. The ceramic was fabricated by pressureless sintering and subsequent hot isostatic pressing sintering with the powder. Furthermore, the correlations among crystal structure, phonon mode parameters and intrinsic dielectric properties were investigated by Raman scattering spectroscopy and Fourier transform far-infrared reflection spectroscopy. The results show that MgO·1.15Ga2O3 ceramic has good microwave dielectric properties (i.e., dielectric constant εr of 13.21 and quality factor Qu×f of 166 THz). Besides, the [Mg—O] polyhedra vibrational group yields a larger contribution to infrared active intensity and dielectric loss rather than other vibration modes. The lattice vibration modes at low frequencies also provide a considerable contribution to intrinsic dielectric loss.

, authors=Shiqiao LI, Bin WANG, Pengyu XU, Bingtian TU, Hao WANG, authorsList=Shiqiao LI, Bin WANG, Pengyu XU, Bingtian TU, Hao WANG, authorCompany=null, correspAuthors=Hao WANG, authorNote=

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

, correspAuthorsNote=
WANG Hao (1969-), male, Ph.D., Professor. E-mail:
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合成了颗粒均匀细小的单相MgO·1.15Ga2O3尖晶石粉体,通过无压预烧结合热等静压烧结制备出致密陶瓷。采用X射线Rietveld全谱拟合法确定其晶体结构为(Mg0.118Ga0.882)IV[Mg0.781Ga1.185□0.033]VIO4(□为空位),用Raman光谱与红外反射光谱研究了晶体结构、声子振动模与本征介电性能的关系。结果表明:MgO·1.15Ga2O3陶瓷的介电常数εr=13.21,品质因子Qu×f=166 THz,且[Mg—O]多面体振动基团的声子振动模对振子强度和本征介电损耗影响较大。晶格声子振动模对本征介电损耗也有不容忽视的影响。

, authors=李石峤, 王斌, 徐鹏宇, 涂兵田, 王皓, authorsList=李石峤, 王斌, 徐鹏宇, 涂兵田, 王皓, authorCompany=null, correspAuthors=王皓, authorNote=

李石峤(1995—),男,硕士研究生。

, correspAuthorsNote=
王皓(1969—),男,博士,教授。
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MgO·1.15Ga2O3陶瓷的晶体结构、振动谱及本征介电性能
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李石峤 , 王斌 , 徐鹏宇 , 涂兵田 , 王皓
硅酸盐学报 | 研究论文 2021,49(9): 1935-1942
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硅酸盐学报 |研究论文 2021 , 49 (9) : 1935 -1942
MgO·1.15Ga2O3陶瓷的晶体结构、振动谱及本征介电性能
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李石峤 , 王斌, 徐鹏宇, 涂兵田, 王皓
作者信息
  • 武汉理工大学材料复合新技术国家重点实验室,武汉 430070
通讯作者:
王皓(1969—),男,博士,教授。
作者简介:

李石峤(1995—),男,硕士研究生。

Crystalline Structure, Vibrational Spectra and Intrinsic Dielectric Properties of MgO·1.15Ga2O3 Ceramic
Shiqiao LI , Bin WANG, Pengyu XU, Bingtian TU, Hao WANG
Affiliations
  • State Key Lab of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
  • Corresponding Author:
    WANG Hao (1969-), male, Ph.D., Professor. E-mail:

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

出版时间: 2021-09-20 doi: 10.14062/j.issn.0454-5648.20200977
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合成了颗粒均匀细小的单相MgO·1.15Ga2O3尖晶石粉体,通过无压预烧结合热等静压烧结制备出致密陶瓷。采用X射线Rietveld全谱拟合法确定其晶体结构为(Mg0.118Ga0.882)IV[Mg0.781Ga1.185□0.033]VIO4(□为空位),用Raman光谱与红外反射光谱研究了晶体结构、声子振动模与本征介电性能的关系。结果表明:MgO·1.15Ga2O3陶瓷的介电常数εr=13.21,品质因子Qu×f=166 THz,且[Mg—O]多面体振动基团的声子振动模对振子强度和本征介电损耗影响较大。晶格声子振动模对本征介电损耗也有不容忽视的影响。

非化学计量镓酸镁  /  本征介电性能  /  晶体结构  /  红外反射谱

Magnesium gallate spinel ceramic is a promising candidate material for communication system devices due to its unique microwave dielectric properties. In this work, a pure phase MgO·1.15Ga2O3 ceramic powder with the uniform and fine particle size was synthesized via solid-state reaction. The crystal structure of synthesized powder was determined by X-ray diffraction, showing that the structure is (Mg0.118Ga0.882)IV[Mg0.781Ga1.185□0.033]VIO4. The ceramic was fabricated by pressureless sintering and subsequent hot isostatic pressing sintering with the powder. Furthermore, the correlations among crystal structure, phonon mode parameters and intrinsic dielectric properties were investigated by Raman scattering spectroscopy and Fourier transform far-infrared reflection spectroscopy. The results show that MgO·1.15Ga2O3 ceramic has good microwave dielectric properties (i.e., dielectric constant εr of 13.21 and quality factor Qu×f of 166 THz). Besides, the [Mg—O] polyhedra vibrational group yields a larger contribution to infrared active intensity and dielectric loss rather than other vibration modes. The lattice vibration modes at low frequencies also provide a considerable contribution to intrinsic dielectric loss.

non-stoichiometric magnesium gallate  /  intrinsic dielectric properties  /  crystal structure  /  infrared reflection spectra
李石峤, 王斌, 徐鹏宇, 涂兵田, 王皓. MgO·1.15Ga2O3陶瓷的晶体结构、振动谱及本征介电性能. 硅酸盐学报, 2021 , 49 (9) : 1935 -1942 . DOI: 10.14062/j.issn.0454-5648.20200977
Shiqiao LI, Bin WANG, Pengyu XU, Bingtian TU, Hao WANG. Crystalline Structure, Vibrational Spectra and Intrinsic Dielectric Properties of MgO·1.15Ga2O3 Ceramic[J]. Journal of the Chinese Ceramic Society, 2021 , 49 (9) : 1935 -1942 . DOI: 10.14062/j.issn.0454-5648.20200977
  • 国家重点研发计划(2017YFB0310500)
  • 国家自然科学基金(51472195; 51502219)
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doi: 10.14062/j.issn.0454-5648.20200977
  • 接收时间:2020-12-29
  • 首发时间:2026-10-30
  • 出版时间:2021-09-20
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  • 收稿日期:2020-12-29
  • 修回日期:2021-04-15
基金
国家重点研发计划(2017YFB0310500)
国家自然科学基金(51472195; 51502219)
作者信息
    武汉理工大学材料复合新技术国家重点实验室,武汉 430070

通讯作者:

王皓(1969—),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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占总种数比例
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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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