Properties of ZrO2-pillared fluorine micas synthesized using poly(vinyl alcohol) as a template agent
Properties of ZrO2-pillared fluorine micas synthesized using poly(vinyl alcohol) as a template agent
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聚乙烯醇为模板剂合成ZrO2柱撑氟云母的性能
DOI：
10.2109/jcersj.111.567
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发表时间：
2003
影响因子：
1.1
通讯作者：
M. Daimon
中科院分区：
文献类型：
--
作者：
T. Yamaguchi;K. Kitajima;E. Sakai;M. Daimon
以合成的高层电荷可膨胀氟云母和老化的氧氯化锆溶液为原料，在不同的条件下，以聚乙烯醇（PVA）为模板剂或不以PVA为模板剂，制备了ZrO 2柱撑氟云母。研究了制备条件对柱撑云母的形成和性能的影响。模板法制备的ZrO 2柱撑氟云母的层间距和比表面积均大于不加PVA直接插层法制备的样品。用PVA模板法合成的柱撑云母的比表面积取决于制备条件，如洗涤条件和插层温度。在较低的热处理温度下，初始配合物的洗涤过程是控制柱撑云母比表面积的关键步骤。在最佳插层温度为2 5 °C时，用模板法制备的柱撑云母经5 0 0 °C热处理后，BET比表面积最大为2 4 0 m2·g-1，层间距为2.1nm。通过在600-700°C下在没有粘合剂的情况下烧制柱撑云母前体的粉末压块来获得保持微孔的ZrO 2 -柱撑氟云母的可加工烧结体。
ZrO 2 -pillared fluorine micas were prepared from synthetic highly layer-charged expandable fluorine mica and an aged zirconyl chloride solution under different conditions, with or without using poly (vinyl alcohol) (PVA) as a template agent. The effect of preparation conditions on the formation and properties of the pillared micas have been studied. The basal spacings and the specific surface areas of the ZrO 2 -pillared fluorine micas obtained by the template method were larger than those obtained by the direct intercalation method without PVA. The specific surface area of the pillared micas synthesized by the template method using PVA depended on preparation conditions, such as washing conditions and intercalation temperatures. The washing process of the initial complexes was a key step in controverts the specific surface area of pillared micas at lower heat treatment temperatures. The pillared mica obtained by the template method at the optimal intercalation temperature of 25°C gave a maximum BET specific surface area of 240 m 2 .g -1 and a basal spacing of 2.1 nm following a heat treatment at 500°C. Machinable sintered bodies of ZrO 2 -pillared fluorine micas retaining micropores were obtained by firing powder compacts of pillared mica precursors at 600-700°C without binders.