Article(id=1319987069041099134, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1319986978137944236, articleNumber=null, orderNo=null, doi=10.14062/j.issn.0454-5648.20210288, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1618761600000, receivedDateStr=2021-04-19, revisedDate=1622995200000, revisedDateStr=2021-06-07, acceptedDate=null, acceptedDateStr=null, onlineDate=1792639041432, onlineDateStr=2026-10-22, pubDate=1647705600000, pubDateStr=2022-03-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1792639041432, onlineIssueDateStr=2026-10-22, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1792639041432, creator=13701087609, updateTime=1792639041432, updator=13701087609, issue=Issue{id=1319986978137944236, tenantId=1146029695717560320, journalId=1263187385517883426, year='2022', volume='50', issue='3', pageStart='555', pageEnd='876', issueExtLink='null', onlineDate='null', pubDate='1647705600000', pubDateStr='2022-03-20', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=0, createTime=1792639019760, creator='13701087609', updateTime=1792639223744, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1319987833767575858, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1319986978137944236, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1319987833767575859, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1319986978137944236, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=729, endPage=734, ext={EN=ArticleExt(id=1319987069255008639, articleId=1319987069041099134, tenantId=1146029695717560320, journalId=1263187385517883426, language=EN, title=Microstructure and Mechanical Properties of Alumina Porous Ceramic Beads Prepared by Gel-dripping Method, columnId=1263922769897599102, journalTitle=Journal of the Chinese Ceramic Society, columnName=Research Articles, runingTitle=null, highlight=null, articleAbstract=

Porous alumina (Al2O3) beads were prepared via gel-dripping and pressureless sintering with α-Al2O3 as a raw material, nontoxic sodium alginate as a gelation reagent, and the calcium ions were introduced in the preparation using a calcium chloride solution. The effects of coagulation time and sintering temperature on the porosity, compressive strength and microstructure of porous Al2O3 beads were investigated. The results show that calcium ions can transfer and react readily with sodium alginate as the coagulation time increases. Alumina particles are solidified to form a bead green body by a three-dimensional network. The number of meso-pores decreases and the microstructure becomes well-distributed with increasing the sintering temperature. The porosity and compressive strength are 47.7%-78.1% and 1.2-36.0 MPa, respectively. The porosity, pore structure and compressive strength can be tailored by optimizing the coagulation time, sintering temperature and calcium ion concentration. The diameter, sphericity and property of porous alumina beads can be controlled through the simple gel-dripping method. The porous alumina beads can be used in many fields, such as catalyst support, adsorption, separation, purification, etc..

, authors=Xiulan HE, Yu YANG, Zhaofen ZHANG, Shilong WANG, Xinxin JIN, authorsList=Xiulan HE, Yu YANG, Zhaofen ZHANG, Shilong WANG, Xinxin JIN, authorCompany=null, correspAuthors=null, authorNote=

HE Xiulan (1973-), female, Ph.D, Associate Professor. E-mail:

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以α-Al2O3为原料,环保无毒的海藻酸钠为凝胶体系,通过氯化钙溶液引入钙离子,利用凝胶-滴注及无压烧结的方法制备了Al2O3多孔陶瓷球,研究了固化时间及烧结温度对Al2O3多孔陶瓷球的气孔率、抗压强度及显微结构的影响规律。结果表明:固化时间延长,有利于钙离子迁移,与海藻酸钠发生反应,形成三维交联网状结构,使Al2O3粉原位固化形成陶瓷球坯。烧结温度升高,颗粒间的间隙孔减少,显微结构更加均匀,抗压强度升高。Al2O3多孔陶瓷球的气孔率约在47.7%~78.1%之间,抗压强度在1.2~36.0 MPa范围内。通过优化固化时间、烧结温度、Ca2+浓度等工艺参数可调控多孔陶瓷球的气孔率、孔结构及抗压强度。利用工艺简单的凝胶-滴注法方便进行多孔陶瓷球的直径、球形度及性能的控制,在催化剂载体、吸附、分离提纯等领域将具有广泛的应用前景。

, authors=何秀兰, 杨禹, 张兆芬, 王士龙, 金鑫鑫, authorsList=何秀兰, 杨禹, 张兆芬, 王士龙, 金鑫鑫, authorCompany=null, correspAuthors=null, authorNote=

何秀兰(1973—),女,博士,副教授。

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凝胶-滴注法制备的Al2O3多孔陶瓷球的显微结构与力学性能
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何秀兰 , 杨禹 , 张兆芬 , 王士龙 , 金鑫鑫
硅酸盐学报 | 研究论文 2022,50(3): 729-734
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硅酸盐学报 |研究论文 2022 , 50 (3) : 729 -734
凝胶-滴注法制备的Al2O3多孔陶瓷球的显微结构与力学性能
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何秀兰 , 杨禹, 张兆芬, 王士龙, 金鑫鑫
作者信息
  • 哈尔滨理工大学材料科学与化学工程学院,哈尔滨 150040
作者简介:

何秀兰(1973—),女,博士,副教授。

Microstructure and Mechanical Properties of Alumina Porous Ceramic Beads Prepared by Gel-dripping Method
Xiulan HE , Yu YANG, Zhaofen ZHANG, Shilong WANG, Xinxin JIN
Affiliations
  • School of Materials Science and Chemical Engineering, Harbin University of Science and Technology, Harbin 150040, China
  • HE Xiulan (1973-), female, Ph.D, Associate Professor. E-mail:

出版时间: 2022-03-20 doi: 10.14062/j.issn.0454-5648.20210288
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以α-Al2O3为原料,环保无毒的海藻酸钠为凝胶体系,通过氯化钙溶液引入钙离子,利用凝胶-滴注及无压烧结的方法制备了Al2O3多孔陶瓷球,研究了固化时间及烧结温度对Al2O3多孔陶瓷球的气孔率、抗压强度及显微结构的影响规律。结果表明:固化时间延长,有利于钙离子迁移,与海藻酸钠发生反应,形成三维交联网状结构,使Al2O3粉原位固化形成陶瓷球坯。烧结温度升高,颗粒间的间隙孔减少,显微结构更加均匀,抗压强度升高。Al2O3多孔陶瓷球的气孔率约在47.7%~78.1%之间,抗压强度在1.2~36.0 MPa范围内。通过优化固化时间、烧结温度、Ca2+浓度等工艺参数可调控多孔陶瓷球的气孔率、孔结构及抗压强度。利用工艺简单的凝胶-滴注法方便进行多孔陶瓷球的直径、球形度及性能的控制,在催化剂载体、吸附、分离提纯等领域将具有广泛的应用前景。

Al2O3多孔陶瓷球  /  凝胶-滴注法  /  海藻酸钠  /  固化时间  /  烧结温度

Porous alumina (Al2O3) beads were prepared via gel-dripping and pressureless sintering with α-Al2O3 as a raw material, nontoxic sodium alginate as a gelation reagent, and the calcium ions were introduced in the preparation using a calcium chloride solution. The effects of coagulation time and sintering temperature on the porosity, compressive strength and microstructure of porous Al2O3 beads were investigated. The results show that calcium ions can transfer and react readily with sodium alginate as the coagulation time increases. Alumina particles are solidified to form a bead green body by a three-dimensional network. The number of meso-pores decreases and the microstructure becomes well-distributed with increasing the sintering temperature. The porosity and compressive strength are 47.7%-78.1% and 1.2-36.0 MPa, respectively. The porosity, pore structure and compressive strength can be tailored by optimizing the coagulation time, sintering temperature and calcium ion concentration. The diameter, sphericity and property of porous alumina beads can be controlled through the simple gel-dripping method. The porous alumina beads can be used in many fields, such as catalyst support, adsorption, separation, purification, etc..

alumina porous ceramic beads  /  gel-dripping method  /  sodium alginate  /  coagulation time  /  sintering temperature
何秀兰, 杨禹, 张兆芬, 王士龙, 金鑫鑫. 凝胶-滴注法制备的Al2O3多孔陶瓷球的显微结构与力学性能. 硅酸盐学报, 2022 , 50 (3) : 729 -734 . DOI: 10.14062/j.issn.0454-5648.20210288
Xiulan HE, Yu YANG, Zhaofen ZHANG, Shilong WANG, Xinxin JIN. Microstructure and Mechanical Properties of Alumina Porous Ceramic Beads Prepared by Gel-dripping Method[J]. Journal of the Chinese Ceramic Society, 2022 , 50 (3) : 729 -734 . DOI: 10.14062/j.issn.0454-5648.20210288
  • 国家自然科学基金项目(51602082)
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doi: 10.14062/j.issn.0454-5648.20210288
  • 接收时间:2021-04-19
  • 首发时间:2026-10-22
  • 出版时间:2022-03-20
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  • 收稿日期:2021-04-19
  • 修回日期:2021-06-07
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国家自然科学基金项目(51602082)
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    哈尔滨理工大学材料科学与化学工程学院,哈尔滨 150040
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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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