偏钛酸锂纳米晶的烧结行为

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2019-12-10 DOI:10.22068/IJMSE.16.4.43

A. Abbasian, M. Rahimipour, Z. Hamnabard

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引用次数: 1

摘要

本文采用水热法制备了金属钛酸锂(Li2TiO3)纳米晶，并进行了热处理。为了研究合成粉体的烧结性能，在恒升温速率下测定了粉体的收缩率。通过膨胀分析构建了合成粉体的致密化曲线，并对不同升温速率下的致密化曲线进行了评价。采用分析法和主曲线烧结法测定了烧结初期的活化能。两种方法计算得到的活化能值分别为229±14和230 kJ/mol，结果一致。此外，表面扩散是Li2TiO3纳米晶初始烧结致密化的主要机制。

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Sintering Behavior of Lithium Meta Titanate Nanocrystallites

In this work, lithium meta titanate (Li2TiO3) nanocrystallites were synthesized by hydrothermal method and subsequent heat treatment. The shrinkage of the powder compact was measured under constant heating rate in order to study the sintering behavior of the synthesized powders. Densification curves of the synthesized powders were also constructed via the dilatometry analysis and evaluated at several heating rates. Two separate methods of analytical procedure and master curve sintering were employed to determine the activation energy of the initial sintering stage. The activation energy values were estimated based on these two distinct methods as 229±14 and 230 kJ/mol respectively, consistenting with each other. Moreover, surface diffusion was determined as the dominant mechanism of densification on initial sintering of Li2TiO3 nanocrystallites.

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.