Article(id=1319222576203809351, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1319222570398888648, articleNumber=null, orderNo=null, doi=10.14062/j.issn.0454-5648.20220800, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1664294400000, receivedDateStr=2022-09-28, revisedDate=1666886400000, revisedDateStr=2022-10-28, acceptedDate=null, acceptedDateStr=null, onlineDate=1792456772136, onlineDateStr=2026-10-20, pubDate=1679241600000, pubDateStr=2023-03-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1792456772136, onlineIssueDateStr=2026-10-20, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1792456772136, creator=13701087609, updateTime=1792456772136, updator=13701087609, issue=Issue{id=1319222570398888648, tenantId=1146029695717560320, journalId=1263187385517883426, year='2023', volume='51', issue='3', pageStart='561', pageEnd='830', issueExtLink='null', onlineDate='null', pubDate='1679241600000', pubDateStr='2023-03-20', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=0, createTime=1792456770752, creator='13701087609', updateTime=1792456924637, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1319223215889699377, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1319222570398888648, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1319223215889699378, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1319222570398888648, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=571, endPage=578, ext={EN=ArticleExt(id=1319222576421913160, articleId=1319222576203809351, tenantId=1146029695717560320, journalId=1263187385517883426, language=EN, title=Synthesis of Porous Magnesia Based Composite Spinel (Mg (Fe, Al)2O4) Refractory Aggregates, columnId=1321891096775472081, journalTitle=Journal of the Chinese Ceramic Society, columnName=Special Issue on Advances in Basic Research on Refractories Related—Research Articles, runingTitle=null, highlight=null, articleAbstract=

Porous aggregates are a key material for the lightweight refractory. Porous magnesia based composite spinel (Mg (Fe, Al)2O4) refractory aggregates were prepared by an in-situ decomposition synthesis method with calcined magnesite, Al(OH)3 and iron oxide as raw materials. The influence of sintering temperature (i.e., 1 000-1 600 ℃) on the microstructures and strengths was investigated, and the synthesis mechanism of porous aggregates was analyzed. The results show that the pores in the samples are composed of the pores in the micron-sized particles and the pores among micron-sized particles as well as they have a few neck connections at the sintering temperatures of 1 000-1 300 ℃, and the pores in the micron-sized particles migrate to the gaps and the necks grow with a further increase of sintering temperature to 1 400-1 600 ℃, thus promoting the compressive strength of the samples. The formation of composite spinel (Mg (Fe, Al)2O4) in the samples involves that MgAl2O4 is formed on the surface of Al(OH)3 pseudomorph and reacts with Fe3+ to form the composite spinel (Mg (Fe, Al)2O4) with a ring structure, and MgFe2O4 is formed in the position of MgO and reacts with Al3+ to form the composite spinel (Mg (Fe, Al)2O4) with the granular and strip structures. The porous magnesia based composite spinel (Mg (Fe, Al)2O4) refractory aggregates have the optimum performance (i.e., an apparent porosity of 24.4%, a median pore size of 25.89 μm, a thermal conductivity of 2.79 W/(m·K) at 1 000 ℃ and a compressive strength of 74.4 MPa) at the sintering temperature of 1 550 ℃. Meanwhile, compared with the existing sintered magnesia, the thermal conductivity of porous magnesia based composite spinel (Mg (Fe, Al)2O4) refractory aggregates synthesized can be reduced by 64.7%.

, authors=Qianlin CHEN1, Wen YAN1, Xiao WANG2, authorsList=Qianlin CHEN, Wen YAN, Xiao WANG, authorCompany=null, correspAuthors=Wen YAN, authorNote=

CHEN Qianlin (1998-), female, Doctorial candidate. E-mail:

, correspAuthorsNote=
YAN Wen (1981-), male, Ph. D., Professor. E-mail:
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多孔骨料是对耐火材料进行轻量化设计的关键。以轻烧菱镁矿、氢氧化铝和铁红为原料,采用原位分解合成法,成功制备了多孔镁基镁铁铝复合尖晶石耐火骨料,在分析烧成温度(1000~1600 ℃)对显微结构与强度影响的基础上,研究了多孔骨料的合成机理。研究表明:当烧成温度为1000~1300 ℃时,试样内气孔来自微颗粒内和微颗粒之间,基本没有颈部连接;当烧成温度升高到1400~1600 ℃时,微颗粒内气孔合并长大、迁出,颈部显著长大,强度提高;镁铁铝复合尖晶石的形成过程分为2步,一是在氢氧化铝假象表面生成MgAl2O4后,再与Fe3+反应生成环状镁铁铝复合尖晶石,二是在MgO位置生成MgFe2O4,再与Al3+反应生成粒状和条状镁铁铝复合尖晶石;当烧成温度为1550 ℃时,试样具有优异的综合性能,其显气孔率为24.4%,中位孔径为25.89 μm,导热系数为2.79 W/(m·K)(1000 ℃),耐压强度为74.4 MPa,与市售烧结镁砂相比,导热系数降低了64.7%。

, authors=陈茜琳1, 鄢文1, 王晓2, authorsList=陈茜琳, 鄢文, 王晓, authorCompany=null, correspAuthors=鄢文, authorNote=

陈茜琳(1998—),女,博士研究生。

, correspAuthorsNote=
鄢文(1981—),男,博士,教授。
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CHEN Qianlin (1998-), female, Doctorial candidate. E-mail:

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多孔镁基镁铁铝复合尖晶石耐火骨料的合成机理
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陈茜琳 1 , 鄢文 1 , 王晓 2
硅酸盐学报 | 耐火材料相关基础研究进展专题—研究论文 2023,51(3): 571-578
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硅酸盐学报 |耐火材料相关基础研究进展专题—研究论文 2023 , 51 (3) : 571 -578
多孔镁基镁铁铝复合尖晶石耐火骨料的合成机理
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陈茜琳1 , 鄢文1 , 王晓2
作者信息
  • 1.武汉科技大学,省部共建耐火材料与冶金国家重点实验室,武汉 430081
  • 2.青海大学化工学院,西宁 810016
通讯作者:
鄢文(1981—),男,博士,教授。
作者简介:

陈茜琳(1998—),女,博士研究生。

Synthesis of Porous Magnesia Based Composite Spinel (Mg (Fe, Al)2O4) Refractory Aggregates
Qianlin CHEN1 , Wen YAN1 , Xiao WANG2
Affiliations
  • 1.Wuhan University of Science and Technology, The State Key Laboratory of Refractories and Metallurgy, Wuhan 430081, China
  • 2.Qinghai University, School of Chemical Engineering, Xining 810016, China
  • Corresponding Author:
    YAN Wen (1981-), male, Ph. D., Professor. E-mail:

    CHEN Qianlin (1998-), female, Doctorial candidate. E-mail:

出版时间: 2023-03-20 doi: 10.14062/j.issn.0454-5648.20220800
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多孔骨料是对耐火材料进行轻量化设计的关键。以轻烧菱镁矿、氢氧化铝和铁红为原料,采用原位分解合成法,成功制备了多孔镁基镁铁铝复合尖晶石耐火骨料,在分析烧成温度(1000~1600 ℃)对显微结构与强度影响的基础上,研究了多孔骨料的合成机理。研究表明:当烧成温度为1000~1300 ℃时,试样内气孔来自微颗粒内和微颗粒之间,基本没有颈部连接;当烧成温度升高到1400~1600 ℃时,微颗粒内气孔合并长大、迁出,颈部显著长大,强度提高;镁铁铝复合尖晶石的形成过程分为2步,一是在氢氧化铝假象表面生成MgAl2O4后,再与Fe3+反应生成环状镁铁铝复合尖晶石,二是在MgO位置生成MgFe2O4,再与Al3+反应生成粒状和条状镁铁铝复合尖晶石;当烧成温度为1550 ℃时,试样具有优异的综合性能,其显气孔率为24.4%,中位孔径为25.89 μm,导热系数为2.79 W/(m·K)(1000 ℃),耐压强度为74.4 MPa,与市售烧结镁砂相比,导热系数降低了64.7%。

多孔耐火骨料  /  镁基镁铁铝复合尖晶石  /  原位分解合成法  /  显微结构  /  强度

Porous aggregates are a key material for the lightweight refractory. Porous magnesia based composite spinel (Mg (Fe, Al)2O4) refractory aggregates were prepared by an in-situ decomposition synthesis method with calcined magnesite, Al(OH)3 and iron oxide as raw materials. The influence of sintering temperature (i.e., 1 000-1 600 ℃) on the microstructures and strengths was investigated, and the synthesis mechanism of porous aggregates was analyzed. The results show that the pores in the samples are composed of the pores in the micron-sized particles and the pores among micron-sized particles as well as they have a few neck connections at the sintering temperatures of 1 000-1 300 ℃, and the pores in the micron-sized particles migrate to the gaps and the necks grow with a further increase of sintering temperature to 1 400-1 600 ℃, thus promoting the compressive strength of the samples. The formation of composite spinel (Mg (Fe, Al)2O4) in the samples involves that MgAl2O4 is formed on the surface of Al(OH)3 pseudomorph and reacts with Fe3+ to form the composite spinel (Mg (Fe, Al)2O4) with a ring structure, and MgFe2O4 is formed in the position of MgO and reacts with Al3+ to form the composite spinel (Mg (Fe, Al)2O4) with the granular and strip structures. The porous magnesia based composite spinel (Mg (Fe, Al)2O4) refractory aggregates have the optimum performance (i.e., an apparent porosity of 24.4%, a median pore size of 25.89 μm, a thermal conductivity of 2.79 W/(m·K) at 1 000 ℃ and a compressive strength of 74.4 MPa) at the sintering temperature of 1 550 ℃. Meanwhile, compared with the existing sintered magnesia, the thermal conductivity of porous magnesia based composite spinel (Mg (Fe, Al)2O4) refractory aggregates synthesized can be reduced by 64.7%.

porous refractory aggregates  /  magnesia based composite spinel (Mg(Fe, Al)2O4)  /  In-situ decomposition synthesis method  /  microstructures  /  strengths
陈茜琳, 鄢文, 王晓. 多孔镁基镁铁铝复合尖晶石耐火骨料的合成机理. 硅酸盐学报, 2023 , 51 (3) : 571 -578 . DOI: 10.14062/j.issn.0454-5648.20220800
Qianlin CHEN, Wen YAN, Xiao WANG. Synthesis of Porous Magnesia Based Composite Spinel (Mg (Fe, Al)2O4) Refractory Aggregates[J]. Journal of the Chinese Ceramic Society, 2023 , 51 (3) : 571 -578 . DOI: 10.14062/j.issn.0454-5648.20220800
  • 国家自然科学基金(U1908227; U21A2058)
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doi: 10.14062/j.issn.0454-5648.20220800
  • 接收时间:2022-09-28
  • 首发时间:2026-10-20
  • 出版时间:2023-03-20
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  • 收稿日期:2022-09-28
  • 修回日期:2022-10-28
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国家自然科学基金(U1908227; U21A2058)
作者信息
    1.武汉科技大学,省部共建耐火材料与冶金国家重点实验室,武汉 430081
    2.青海大学化工学院,西宁 810016

通讯作者:

鄢文(1981—),男,博士,教授。
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https://castjournals.cast.org.cn/joweb/gsyxb/CN/10.14062/j.issn.0454-5648.20220800
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2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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