共查询到18条相似文献,搜索用时 187 毫秒
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近年来,多孔陶瓷材料在保温、气体过滤、催化载体、分离膜、窑具、骨和牙齿的生物医学替代品,以及传感器材料等领域应用越来越广泛。针对多孔陶瓷制备工艺和性能的研究呈现快速发展的趋势,并取得了大量的研究成果。本文以多孔陶瓷的制备工艺为主线,综述了部分烧结法、牺牲模板法、复制模板法、直接发泡法和3D打印法等5种主要多孔陶瓷制备方法的发展现状与研究成果。同时也探讨了各种方法的优缺点以及未来的发展方向,为多孔陶瓷的进一步发展提供了指导和参考。 相似文献
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多孔陶瓷的制备、性能及应用:(I)多孔陶瓷的制造工艺 总被引:21,自引:2,他引:21
多孔陶瓷的制备方法很多,其成孔机理主要有机械挤出、颗粒堆积、成孔剂、发泡、多孔模板、凝结结构成孔。本文根据成孔机理的不同综述了多孔陶瓷的制备工艺最新研究进展。 相似文献
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朱立刚 《陶瓷研究与职业教育》1994,(4)
新型发泡工艺朱立刚(绍兴宏基陶瓷有限公司,绍兴312352)1引言众所周知,发泡剂的选择在多孔陶瓷的制造过程中是至关重要的,它的类型、发泡温度范围都直接影响多孔陶瓷材料的显气孔率、结构强度、气孔平均分布范围等各项理化性能。传统的发泡工艺是在产品成形前... 相似文献
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绿色多功能材料--多孔陶瓷 总被引:2,自引:0,他引:2
多孔陶瓷是一种新型材料,由于其具有较低的热传导等优良性能,而被广泛地应用于众多科学领域.笔者综述了多孔陶瓷的制备工艺、性能及应用,尤其是讨论了多孔陶瓷在各个领域的应用,最后展望了多孔陶瓷的发展前景及今后的发展方向. 相似文献
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《Journal of the European Ceramic Society》2022,42(15):7209-7218
How to improve the strength of fibrous porous ceramics dramatically under the premise of no sacrificing its low density and thermal conductivity has remained a challenge in the high-temperature thermal insulation field. In this paper, a new kind of high-strength mullite fiber-based ceramics composed of interlocked porous mullite fibers was prepared by nanoemulsion electrospinning and dry pressing method. Results show that as to the porous ceramics with the same density (~ 0.8 g/cm3), the three-dimensional skeleton structure composed of porous mullite fibers was much denser than that composed of solid mullite fibers. Therefore, porous mullite fiber-based ceramics exhibited a higher compressive strength (5.53 MPa) than that of solid mullite fiber-based ceramics (3.21 MPa). In addition, porous mullite fiber-based ceramics exhibited a superior high-temperature heat insulation property because the porous structure in fibers could reduce the radiant heat conduction. This work provides new insight into the development of high-temperature thermal insulators. 相似文献
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《Ceramics International》2023,49(1):847-854
Mullite fiber-based porous ceramics have been widely used in the field of heat insulation. To further broaden their applications in other fields, such as filtration and sound absorption, mullite whiskers and alumina platelets were introduced as the secondary structural materials in mullite fiber-based porous ceramics by a sol-gel combining heat-treating method, and new fiber-based porous ceramics with a unique multilevel pore structure were developed. By adjusting the molar ratios of aluminium tri-sec-butoxide to aluminium fluoride and calcination temperature, these fiber-based porous ceramics not only presented the characteristics of lightweight (maximum density of 0.38 g/cm3) and good heat insulation (minimum thermal conductivity of 0.11 W/mK) comparable to traditional fiber-based porous ceramics, but also showed a superior specific surface area (up to 11.5 g/m2) and excellent sound absorption performance (average sound absorption coefficient as high as 0.728). Owing to these outstanding characteristics, the corresponding porous ceramics are expected to be promising multifunctional materials in diverse fields, especially thermal insulation and sound absorption. 相似文献
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多孔碳化硅陶瓷的抗热震性研究 总被引:1,自引:0,他引:1
本文考察了多了孔碳化硅陶瓷的抗热震性,并探讨了不同制造工艺对多孔碳化硅陶瓷抗热震性的影响。同时研究了SiC陶瓷在热处理过程中SiC颗粒表面氧化形成的SiO2在不同热处理温度的状态变化及其对试样抗热震性的影响。 相似文献
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以微米级SiC粉为原料,采用冷冻干燥工艺制备具有连贯层状孔结构的SiC陶瓷。以多孔SiC陶瓷为基体,石蜡为相变芯材,通过真空浸渍法制备多孔SiC陶瓷/石蜡复合相变材料,研究了石蜡在层状多孔SiC陶瓷内的浸渗行为及复合材料的储热性能。结果表明,层片状多孔SiC陶瓷的显微形貌对石蜡的浸渗过程及储热性能有明显影响。当石蜡负载量为21.7%(质量分数)时,复合相变材料熔融温度为59.6 ℃,凝固温度为53.9 ℃,相变潜热为28.4 J/g,室温下的热导率为2.4 W·(m·K)-1。复合相变材料吸热峰和放热峰强度随着石蜡负载量减少而降低,当温度为200 ℃时,多孔SiC陶瓷/石蜡复合相变材料失重为5%(质量分数),表明材料具有良好的热稳定性。复合相变材料在100 ℃热处理30 min后陶瓷基体未发生形变,经100次热循环后具有稳定的相变潜热和良好的定型能力。 相似文献
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