烯基冷冻铸造氧化铈的微观结构转变:主要构建块的影响

IF 1.3 4区材料科学 Q3 MATERIALS SCIENCE, CERAMICS

Advances in Applied Ceramics Pub Date : 2021-05-19 DOI:10.1080/17436753.2021.1945850

Raghunath Sharma Mukkavilli, Kousik Papakollu, Ravi Kumar

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引用次数: 1

摘要

用于高温催化的多孔二氧化铈要求结构完整，同时具有抗烧结性和改善的透气性。目前的技术依赖于复杂的合成方法，这些方法不仅昂贵，而且在孔的可定制性方面缺乏灵活性。因此，通过低成本工艺开发多孔支架而不影响其功能是有必要的。在这里，我们首次展示了通过camphene辅助冷冻铸造开发的多孔铈，其开孔率为88%。微观结构的演变与不同的构建模块-微米大小的颗粒和短纤维也进行了研究。通过温度程序还原获得的初步催化活性证明了类似的概况，表明初始构建块对活性没有影响。

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Microstructural transitions in camphene-based freeze casted ceria: effect of primary building blocks

ABSTRACT Porous ceria for high temperature catalytic applications demands structural integrity concomitant with sinter resistance and improved gas permeability. The current state of the art hinges on complex synthesis methodologies which are not only expensive but also lack flexibility in pore tailorability. Hence, the development of porous scaffolds through low-cost processes without compromising on the functionality is in order. Herein, we demonstrate porous ceria with an open porosity of 88% developed through camphene assisted freeze casting for the first time. Microstructural evolution with different building blocks – micrometre-sized particles and short fibres were also studied. Preliminary catalytic activity obtained via temperature programmed reduction exemplified similar profiles showing no effect of the initial building blocks on the activity.

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来源期刊

Advances in Applied Ceramics 工程技术-材料科学：硅酸盐

CiteScore

4.40

自引率

4.50%

发文量

审稿时长

5.2 months

期刊介绍： Advances in Applied Ceramics: Structural, Functional and Bioceramics provides international coverage of high-quality research on functional ceramics, engineering ceramics and bioceramics.