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首页> 外文期刊>Boletin de la Sociedad Espanola de Ceramica y Vidrio >Reactivity and microstructural evolution in the V- ZrSiO_4 pigmenting system prepared from colloidal gels
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Reactivity and microstructural evolution in the V- ZrSiO_4 pigmenting system prepared from colloidal gels

机译：从胶体凝胶制备的V- Zrsio_4色素沉积系统中的反应性和微观结构演化

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摘要

In this paper is intended to examine themicrostructural changes associated to the sequence of reaction inthe formation of the zircon-vanadium blue pigment, prepared frommixtures of previosly obtained ZrO_2 and V_2O_5 colloidal solsand tetraethylorthosilicate (TEOS). The reaction sequencefollowed by X-Ray diffraction (XRD), revealed the formation of acrystalline phase with the structure of tetragonal zirconia at thefirst step. The tetragonal to monoclinic phase transformation tookplace before the formation of the V~(4+)-ZrSiO_4 solid solution.The microstructures were observed by field emision scanningelectron microscopy (FE-SFM) and energy dispersive X-rayanalysis (FDX). The formation of aggregates of tetragonal ZrO_2particles which were dispersed in an amorphous matrix of silicawas firstly observed. The mechanism of zircon formation involvedthe reaction of amorphous silica with the zirconia particlespreviously transformed to the monoclinic form. The developedfinal microstructure of zircon phases consisted of well formedspherical aggegates up to 3 #mu#m in diameter.
机译：本文旨在研究与锆钒蓝色颜料的形成序列的反应序列相关的大学性能变化，从预先获得的ZrO_2和V_2O_5胶体Sols和四乙酯（TEOS）中制备。通过X射线衍射（XRD）序列序列的反应显示，在流动步骤中揭示了丙烯相的形成与四方氧化锆的结构。在形成V〜（4 +） - ZrSiO_4固溶体之前的四方对单斜相转化造成的。通过场射出扫描电子显微镜（Fe-SFM）和能量分散X-横析（FDX）观察微观结构。首先观察到分散在硅瓦的无定形基质中的四方ZrO_2颗粒的聚集体。锆胺形成的机制涉及与氧化锆颗粒的非晶二氧化硅的反应术前甲基胺形式。锆阶段的诱导主显微结构包括良好的形成任性，直径为3＃mu＃m。

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