在高岭土泡沫中引入微纳气泡,有利于多孔陶瓷的制备

IF 5.8 2区 地球科学 Q2 CHEMISTRY, PHYSICAL
Chengwen Wang , Yanxiu Wang , Haisheng Han , Li Wang , Yue Yang , Ling Zhang , Shipei Wang , Anqi Yang , Wei Sun
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引用次数: 0

摘要

本研究以高岭土为原料,采用微纳气泡发生器制备多孔陶瓷,开发了一种新型的泡沫-凝胶铸造方法。比较了普通水(NW)、添加微纳气泡水(WMB)、添加微纳气泡表面活性剂改性水(SWMB)三种水对多孔陶瓷制备的影响,并对制备的多孔陶瓷的微观结构和性能进行了表征。SWMB制备的多孔陶瓷孔径更小、更均匀,平均孔径为77.4 μm。微观结构分析表明,微纳气泡的有效整合提高了材料的均匀性和稳定性。SWMB制备的陶瓷抗压强度显著提高,具有较好的抗变形和抗破裂性能。此外,更细的孔隙结构抑制了对流传热,而孔壁上微纳孔的存在降低了固体骨架的热传导,使样品即使在降低孔隙率的情况下也能保持低导热性。本工作为浆液发泡法制备多孔陶瓷提供了新的思路。利用稳定的微纳气泡制备出力学性能增强、孔径变小的多孔陶瓷。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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.
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来源期刊
Applied Clay Science
Applied Clay Science 地学-矿物学
CiteScore
10.30
自引率
10.70%
发文量
289
审稿时长
39 days
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...
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