Effect of milling time on mechanical properties of anorthite obtained by thermal transformation of Ca-LTA zeolite

IF 1.4 4区材料科学 Q3 MATERIALS SCIENCE, CERAMICS

Science of Sintering Pub Date : 2022-01-01 DOI:10.2298/sos2203349o

Mia Omerasevic, Z. Baščarević, Radojka Vujasin, A. Devecerski, D. Bučevac

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引用次数: 1

Abstract

Anorthite ceramics was fabricated from calcium exchanged Na-LTA zeolite. The powder compacts of Ca-LTA zeolite were sintered at different temperatures ranging between 1100 and 1400?C. It was found that the temperature of 1100?C was sufficiently high to trigger formation of anorthite which stayed stable even at temperature as high as 1400?C. The highest relative density and the lowest open porosity were measured in samples sintered at 1200?C for 3 h. The effect of milling time of Ca-LTA zeolite precursor on density, microstructure and mechanical properties of samples sintered at 1200?C for 3 h was investigated. The particle size refinement appeared to be beneficial in accelerating densification process and improving mechanical properties. The density, compressive strength and hardness of anorthite ceramics obtained from non-milled precursor were measured to be 70.5 %TD, 64 MPa and 1.45 GPa, respectively. On the other side the anorthite ceramics obtained from 24-hour-long milled zeolite precursor had density of 83.9 %TD, compressive strength of 101 MPa and hardness of 3.44 GPa.

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磨矿时间对Ca-LTA沸石热转化钙长石力学性能的影响

以钙交换Na-LTA沸石为原料制备钙长石陶瓷。在1100 ~ 1400℃的不同温度下对Ca-LTA沸石粉体进行了烧结。结果发现，温度为1100?温度足够高，足以触发钙长石的形成，即使在高达1400℃的温度下也能保持稳定。在1200℃烧结时，试样的相对密度最高，开孔率最低。Ca-LTA沸石前驱体粉碎时间对1200℃烧结试样密度、微观结构和力学性能的影响C作用3 h。晶粒细化有利于加速致密化过程，提高力学性能。由未磨前驱体制备的钙长石陶瓷密度为70.5% TD，抗压强度为64 MPa，硬度为1.45 GPa。另一方面，沸石前驱体经24小时磨制得到的钙长石陶瓷密度为83.9% TD，抗压强度为101 MPa，硬度为3.44 GPa。

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来源期刊

Science of Sintering 工程技术-材料科学：硅酸盐

CiteScore

2.50

自引率

46.70%

发文量

审稿时长

3.3 months

期刊介绍： Science of Sintering is a unique journal in the field of science and technology of sintering. Science of Sintering publishes papers on all aspects of theoretical and experimental studies, which can contribute to the better understanding of the behavior of powders and similar materials during consolidation processes. Emphasis is laid on those aspects of the science of materials that are concerned with the thermodynamics, kinetics and mechanism of sintering and related processes. In accordance with the significance of disperse materials for the sintering technology, papers dealing with the question of ultradisperse powders, tribochemical activation and catalysis are also published. Science of Sintering journal is published four times a year. Types of contribution: Original research papers, Review articles, Letters to Editor, Book reviews.