Synthetic talc advances: Coming closer to nature, added value, and industrial requirements

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• 作者：Angela Dumas ; Fran莽ois Martin ; Eric Ferrage ; Pierre Micoud ; Christophe Le Roux ; Sabine Petit
• 关键词：Synthetic talc ; Hydrothermal synthesis ; Process evolution ; XRD ; Crystalline lamellarity ; CSD Coherent Scattering Domain
• 刊名：Applied Clay Science
• 出版年：November, 2013
• 年：2013
• 卷：85
• 期：Complete
• 页码：8-18
• 全文大小：1647 K

文摘

Over the past 2 years, the synthetic process of talc particles has evolved considerably, leading to an inexpensive, convenient, and rapid process that is compatible with industrial requirements. In addition to facilitate the synthetic talc preparation, the evolution of the synthesis process has led to an improved crystallographic arrangement of the talc particles in both the c* direction and (ab) plane. In the present study, the most recent process was investigated with respect to the reaction time, temperature, pressure, pH, and salt concentration to determine the optimal reaction parameters. In the geomaterial industry, X-ray diffraction is routinely used for powder material characterization; the crystallinity of our synthetic talc was evaluated by this technique through measurements of the Coherent Scattering Domain (CSD) size. A crystalline lamellarity index was defined as the ratio between the CSD size values in the (ab) plane and c^{鈦?/sup> direction. These crystallinity characteristics were used to define the quality of the synthetic talc and its suitability for potential industrial markets.}