Chengwen Wang , Yanxiu Wang , Haisheng Han , Li Wang , Yue Yang , Ling Zhang , Shipei Wang , Anqi Yang , Wei Sun
{"title":"在高岭土泡沫中引入微纳气泡,有利于多孔陶瓷的制备","authors":"Chengwen Wang , Yanxiu Wang , Haisheng Han , Li Wang , Yue Yang , Ling Zhang , Shipei Wang , Anqi Yang , Wei Sun","doi":"10.1016/j.clay.2025.107920","DOIUrl":null,"url":null,"abstract":"<div><div>In this study, a novel foam-gelcasting method employing a micro-nano bubble generator was developed to fabricate porous ceramics using kaolin as raw material. The effects of three types of water including normal water (NW), water with added micro-nano bubbles (WMB), surfactant-modified water with added micro-nano bubbles (SWMB) on the preparation of porous ceramics were compared, and the microstructure and properties of the prepared porous ceramics were characterized. Porous ceramics prepared with SWMB exhibited smaller, more uniform pore sizes, achieving an average pore diameter of 77.4 μm. The microstructure analysis revealed enhanced uniformity and stability due to the effective integration of micro-nano bubbles. The compressive strength of ceramics prepared with SWMB increased significantly, with better resistance to deformation and rupture. Additionally, the finer pore structure suppressed convective heat transfer, while the presence of micro-nano pores within the pore walls decreased the heat conduction of the solid skeleton, allowing the sample to maintain low thermal conductivity even at reduced porosity. This work provides a new idea for the preparation of porous ceramics by the slurry foaming method. Porous ceramics with enhanced mechanical properties and smaller pore size are produced by using stable micro-nano bubbles.</div></div>","PeriodicalId":245,"journal":{"name":"Applied Clay Science","volume":"276 ","pages":"Article 107920"},"PeriodicalIF":5.8000,"publicationDate":"2025-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Introduction of micro-nano bubbles in kaolin foams to facilitate the preparation of porous ceramics\",\"authors\":\"Chengwen Wang , Yanxiu Wang , Haisheng Han , Li Wang , Yue Yang , Ling Zhang , Shipei Wang , Anqi Yang , Wei Sun\",\"doi\":\"10.1016/j.clay.2025.107920\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>In this study, a novel foam-gelcasting method employing a micro-nano bubble generator was developed to fabricate porous ceramics using kaolin as raw material. The effects of three types of water including normal water (NW), water with added micro-nano bubbles (WMB), surfactant-modified water with added micro-nano bubbles (SWMB) on the preparation of porous ceramics were compared, and the microstructure and properties of the prepared porous ceramics were characterized. Porous ceramics prepared with SWMB exhibited smaller, more uniform pore sizes, achieving an average pore diameter of 77.4 μm. The microstructure analysis revealed enhanced uniformity and stability due to the effective integration of micro-nano bubbles. The compressive strength of ceramics prepared with SWMB increased significantly, with better resistance to deformation and rupture. Additionally, the finer pore structure suppressed convective heat transfer, while the presence of micro-nano pores within the pore walls decreased the heat conduction of the solid skeleton, allowing the sample to maintain low thermal conductivity even at reduced porosity. This work provides a new idea for the preparation of porous ceramics by the slurry foaming method. Porous ceramics with enhanced mechanical properties and smaller pore size are produced by using stable micro-nano bubbles.</div></div>\",\"PeriodicalId\":245,\"journal\":{\"name\":\"Applied Clay Science\",\"volume\":\"276 \",\"pages\":\"Article 107920\"},\"PeriodicalIF\":5.8000,\"publicationDate\":\"2025-07-06\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Applied Clay Science\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S016913172500225X\",\"RegionNum\":2,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Clay Science","FirstCategoryId":"89","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S016913172500225X","RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Introduction of micro-nano bubbles in kaolin foams to facilitate the preparation of porous ceramics
In this study, a novel foam-gelcasting method employing a micro-nano bubble generator was developed to fabricate porous ceramics using kaolin as raw material. The effects of three types of water including normal water (NW), water with added micro-nano bubbles (WMB), surfactant-modified water with added micro-nano bubbles (SWMB) on the preparation of porous ceramics were compared, and the microstructure and properties of the prepared porous ceramics were characterized. Porous ceramics prepared with SWMB exhibited smaller, more uniform pore sizes, achieving an average pore diameter of 77.4 μm. The microstructure analysis revealed enhanced uniformity and stability due to the effective integration of micro-nano bubbles. The compressive strength of ceramics prepared with SWMB increased significantly, with better resistance to deformation and rupture. Additionally, the finer pore structure suppressed convective heat transfer, while the presence of micro-nano pores within the pore walls decreased the heat conduction of the solid skeleton, allowing the sample to maintain low thermal conductivity even at reduced porosity. This work provides a new idea for the preparation of porous ceramics by the slurry foaming method. Porous ceramics with enhanced mechanical properties and smaller pore size are produced by using stable micro-nano bubbles.
期刊介绍:
Applied Clay Science aims to be an international journal attracting high quality scientific papers on clays and clay minerals, including research papers, reviews, and technical notes. The journal covers typical subjects of Fundamental and Applied Clay Science such as:
• Synthesis and purification
• Structural, crystallographic and mineralogical properties of clays and clay minerals
• Thermal properties of clays and clay minerals
• Physico-chemical properties including i) surface and interface properties; ii) thermodynamic properties; iii) mechanical properties
• Interaction with water, with polar and apolar molecules
• Colloidal properties and rheology
• Adsorption, Intercalation, Ionic exchange
• Genesis and deposits of clay minerals
• Geology and geochemistry of clays
• Modification of clays and clay minerals properties by thermal and physical treatments
• Modification by chemical treatments with organic and inorganic molecules(organoclays, pillared clays)
• Modification by biological microorganisms. etc...