利用水热法分析伊达尔戈高岭土向方解石沸石和次生相的转化过程

IF 2.7 4区 材料科学 Q1 MATERIALS SCIENCE, CERAMICS
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引用次数: 0

摘要

本研究探讨了在水热系统中,方解石型沸石连同次生相的转化过程。以矿物高岭土和 NaOH 为前驱体,在 140 ℃ 的自生压力下进行反应,每隔 0 到 10 小时改变一次反应时间。对主要前驱体高岭土进行了 X 射线衍射(XRD)、元素化学成分(XRF)和傅立叶变换红外光谱(FT-IR)分析。X 射线衍射对所得到的固体进行了表征。最初形成的结晶相包括 Na-P2 沸石、吉斯蒙德石、芒硝、钠长石和钠长石,但随着时间的推移,这些结晶相变得不稳定,并溶解形成新的结晶相。反应 8 小时后,主要形成的是康氏沸石,达到了研究的主要目的。固体材料通过扫描电子显微镜(SEM)和傅立叶变换红外光谱(FT-IR)进行了分析。通过电感耦合等离子体 (ICP) 评估了溶液中 Na、Si 和 Al 随时间的变化情况。最终结果表明,伊达尔戈的高岭土是一种可行的前驱体,使用中等浓度的 NaOH,在 140 ℃ 下 8 小时内就能合成沸石,主要相为针状沸石。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Análisis de la transformación del caolín de Hidalgo en zeolita cancrinita y fases secundarias por el método hidrotermal

This study investigated the transformation of cancrinite-type zeolite, together with secondary phases, in a hydrothermal system. The mineral kaolin and NaOH were used as precursors under self-generated pressure at 140 °C, varying the reaction time at intervals of 0 to 10 hours. The kaolin, the main precursor, was subjected to X-ray diffraction (XRD), elemental chemical composition (XRF) and Fourier Transform IR Spectroscopy (FT-IR) analyses. The resulting solids were characterized by XRD. Initially, crystalline phases such as Na-P2 zeolites, gismondine, analcime, natrolite and sodalite were formed, but with time they became unstable and dissolved to form new phases. At 8 hours of reaction, the cancrinite zeolite predominated, fulfilling the main objective of the study. The solid material was analyzed by scanning electron microscopy (SEM) and FT-IR. The behavior of Na, Si and Al in the solutions was evaluated over time by inductre coupled plasma (ICP). It was conclusively demonstrated that kaolin from Hidalgo is a feasible precursor to synthesize zeolites, cancrinite type as predominant phase in 8 hours at 140 °C, using moderate concentrations of NaOH.

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来源期刊
Boletin de la Sociedad Espanola de Ceramica y Vidrio
Boletin de la Sociedad Espanola de Ceramica y Vidrio 工程技术-材料科学:硅酸盐
CiteScore
5.50
自引率
2.90%
发文量
72
审稿时长
103 days
期刊介绍: The Journal of the Spanish Ceramic and Glass Society publishes scientific articles and communications describing original research and reviews relating to ceramic materials and glasses. The main interests are on novel generic science and technology establishing the relationships between synthesis, processing microstructure and properties of materials. Papers may deal with ceramics and glasses included in any of the conventional categories: structural, functional, traditional, composites and cultural heritage. The main objective of the Journal of the Spanish Ceramic and Glass Society is to sustain a high standard research quality by means of appropriate reviewing procedures.
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