Patterns in the Synthesis Processes and the Characteristics of Silicate-Spinal Ceramic Pigments When Introducing Mineralizers

O. Zaichuk, Аleksandra Amelina, Olena Khomenko, N. Sribniak, L. Tsyhanenko, O. Savchenko, Oleksandr Telichenko
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引用次数: 2

Abstract

The synthesis of ceramic pigments is conventionally carried out at a high temperature (not less than 1,200 °C). Its reduction implies using mineralizing additives, which have a different mechanism of action on the starting components of pigment charges. The effectiveness of the mineralizers is determined by their nature, content, degree of dispersion in the activated reagent. Thus, searching for the most effective mineralizers in the synthesis, in particular, of silicate-spinel ceramic pigments is an important scientific and practical task.We have investigated the effect of various mineralizing additives (B2O3, Na2B4O7, Na2O, NaF) on the processes of forming the crystal-phase composition of slag-containing ceramic pigments and the change in their color indicators. A direct dependence has been established between the melting point of the mineralizers and the efficiency of their influence on the formation of spinel phases, which are color carriers in such pigments. The tangible effect of the introduction of sodium fluoride, which has the highest melting point among the examined additives, is achieved as a result of the firing of pigments at a temperature not lower than 1,150 °C. The effect of sodium oxide is effective starting at a temperature of 1,100 °C. The most expedient to apply are the boron-containing compounds. Their introduction makes it possible to lower the firing temperature of slag-containing pigments to 1,050 °C while completely binding the starting components in the spinel solid solutions. The ceramic pigments that are thus synthesized enable the formation of glazed coatings, which, in terms of qualitative indicators, are not inferior to coatings obtained with the addition of high-temperature pigments (a firing temperature of 1,200–1,250 °С). The formation of silicate phases (diopside and wollastonite), which are not color carriers in the examined pigments, undergoes effective mineralized action from the supplements of NaF and B2O3
引入矿化剂后硅酸盐-脊柱陶瓷颜料的合成过程规律及特性
陶瓷颜料的合成通常在高温(不低于1200°C)下进行。它的减少意味着使用矿化添加剂,它们对色素电荷的起始成分有不同的作用机制。矿化剂的有效性取决于它们的性质、含量和在活化试剂中的分散程度。因此,寻找合成最有效的矿化剂,特别是硅酸盐尖晶石陶瓷颜料的矿化剂是一项重要的科学和实践任务。研究了不同矿化添加剂(B2O3、Na2B4O7、Na2O、NaF)对含渣陶瓷颜料晶相组成形成过程及其颜色指标变化的影响。矿化剂的熔点与其对尖晶石相形成的影响效率之间已经建立了直接的依赖关系,尖晶石相是这种颜料中的颜色载体。引入氟化钠的实际效果是在不低于1,150°C的温度下对颜料进行烧制,氟化钠在所研究的添加剂中熔点最高。在1100℃的温度下,氧化钠的效果是有效的。最方便使用的是含硼化合物。它们的引入使得将含渣颜料的烧成温度降低到1050℃成为可能,同时完全结合尖晶石固溶体中的起始组分。由此合成的陶瓷颜料能够形成釉面涂层,就定性指标而言,其不逊于添加高温颜料(烧成温度为1200 - 1250°С)获得的涂层。硅酸盐相(透辉石和硅灰石)的形成,在被检测的颜料中不是颜色载体,在NaF和B2O3的补充下经历了有效的矿化作用
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