The effect of quartz on natural fluorapatite decomposition during the preparation of calcium sulfoaluminate-based multiphase composites

IF 3.4 3区工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY

Materials and Structures Pub Date : 2024-11-18 DOI:10.1617/s11527-024-02511-x

Zeyneb Hammou, Hocine Belhouchet

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Abstract

In the research described in this paper, we prepared low-cost multiphase composites based on calcium sulfoaluminate (also known as ye’elimite) and fluorapatite. By utilizing the CaO originally present in fluorapatite, the sintering densification of these composites was enhanced. The influence of varying the SiO₂ content (0–5.4 wt.%) on the reactive sintering of fluorapatite, bauxite, and gypsum was investigated. Incorporating quartz led to the formation of various compositions, including calcium hexaluminate, fluorapatite, ye’elimite, and gehlenite. Quantitative phase analysis, conducted using the Rietveld method via Profex software at various sintering temperatures, demonstrated a relationship between quartz content and the preferential formation of gehlenite over ye’elimite within the 1300–1350 °C range. Additionally, the microstructure of the composites was significantly modified by quartz addition, leading to the development of hexagonal and circular grains after heat treatment at 1400 °C.

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石英对硫铝酸钙基多相复合材料制备过程中天然氟磷灰石分解的影响

在本文所述的研究中，我们制备了基于硫铝酸钙（也称叶焰石）和氟磷灰石的低成本多相复合材料。通过利用氟磷灰石中原本存在的 CaO，这些复合材料的烧结致密性得到了提高。研究了不同二氧化硅含量（0-5.4 wt.%）对氟磷灰石、铝矾土和石膏反应烧结的影响。石英的加入导致了各种成分的形成，包括六铝酸钙、氟磷灰石、叶焰石和gehlenite。在不同的烧结温度下，通过 Profex 软件使用里特维尔德法进行的定量相分析表明，在 1300-1350 °C 范围内，石英含量与优先于叶辉石形成的辉长岩之间存在关系。此外，添加石英后，复合材料的微观结构发生了显著变化，在 1400 °C 热处理后形成了六角形和圆形晶粒。

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来源期刊

Materials and Structures 工程技术-材料科学：综合

CiteScore

6.40

自引率

7.90%

发文量

222

审稿时长

5.9 months

期刊介绍： Materials and Structures, the flagship publication of the International Union of Laboratories and Experts in Construction Materials, Systems and Structures (RILEM), provides a unique international and interdisciplinary forum for new research findings on the performance of construction materials. A leader in cutting-edge research, the journal is dedicated to the publication of high quality papers examining the fundamental properties of building materials, their characterization and processing techniques, modeling, standardization of test methods, and the application of research results in building and civil engineering. Materials and Structures also publishes comprehensive reports prepared by the RILEM’s technical committees.