煅烧温度对工业原料中纳米二氧化钛基挤出物性能的影响

IF 1.5 4区材料科学 Q3 MATERIALS SCIENCE, CERAMICS

Transactions of the Indian Ceramic Society Pub Date : 2023-04-03 DOI:10.1080/0371750X.2023.2204450

M. Safaei

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引用次数: 0

摘要

二氧化钛作为促进剂、载体、催化剂和添加剂是催化反应的重要材料。本文以工业原料为原料，采用挤出法制备了二氧化钛挤出物，并在不同温度下煅烧。结果表明，在450°C至850°C范围内，存在锐钛矿相的纳米结构，因为SO4 2–的存在将金红石成核的形成延迟到950°C，并且在950°C下形貌不规则且光滑。在不同的煅烧温度下，SO4 2–离子和结晶生长会影响二氧化钛挤出物的性能。在低于650℃的温度下，SO4 2–去除的影响大于晶体生长对挤出物性能的影响。但在650摄氏度以上的温度下，由于原子的迁移率，晶体生长的影响占主导地位，尽管会产生更多的硫酸根离子。它减少了开孔体积，提高了强度和耐磨性。图形摘要

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Effect of Calcination Temperature on the Properties of Nanotitania-Based Extrudates from an Industrial Raw Material

Titanium dioxide is an important material for catalytic reactions as a promoter, support, catalyst, and additive. In this paper, titania extrudates were prepared from industrial raw material by an extrusion method and then calcined at different temperatures. Results show that there are nanostructures with anatase phase from 450o to 850oC because the presence of SO4 2– delays the formation of rutile nucleation up to 950oC,and the morphology is irregular and smooth at 950oC. The SO4 2– ions and crystallinegrowth affect the properties of titania extrudates at various calcination temperatures. At temperatures below 650oC, the effect of SO4 2–removal is more than the effect of crystalline growth on the properties of the extrudates. But at temperatures above 650oC, the effect of crystal growth is dominant because of mobility of atoms, although more sulfate ions are exited. It decreases open pore volume and increases strength and attrition resistance. GRAPHICAL ABSTRACT

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来源期刊

Transactions of the Indian Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

2.40

自引率

8.30%

发文量

审稿时长

2.3 months

期刊介绍： Transactions of the Indian Ceramic Society is a quarterly Journal devoted to current scientific research, technology and industry-related news on glass and ceramics. The Journal covers subjects such as the chemical, mechanical, optical, electronic and spectroscopic properties of glass and ceramics, and characterization of materials belonging to this family. The Editor invites original research papers, topical reviews, opinions and achievements, as well as industry profiles for publication. The contributions should be accompanied by abstracts, keywords and other details, as outlined in the Instructions for Authors section. News, views and other comments on activities of specific industries and organizations, and also analyses of industrial scenarios are also welcome.