共查询到20条相似文献,搜索用时 140 毫秒
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本文用扫描电子显微镜、X-射线能谱仪和X-射线衍射仪研究分析了釉泡的结构和矿物组成变化。作者认为釉泡是由于熔块中仍含有未熔融的硅酸锆晶体,使得高温时釉面局部粘度变大,致使气泡被裹挟未能完全排出所造成。提高熔块质量,调节烧成制度是克服釉面釉泡的主要途径。 相似文献
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为研究中温氧化双层花釉的反应过程,本文通过体视显微镜和SEM/EDS对釉样表面及断面进行形貌观测和微区成分分析.结果 表明,当温度升至950℃时釉料开始熔融,底釉和面釉的扩散主要以化学浓度梯度和重力作用为推动力通过接触面进行,底釉中可以检测到P元素,而面釉中尚未检测到Fe元素.1 000℃时扩散作用加剧,着色氧化物Fe2O3开始熔融致使底釉由红色转变为黄色,釉中气泡的搅动促进组分扩散迁移,Fe和P元素在底釉与面釉中均有分布.1 100℃时大尺寸气泡冲散面釉破裂排出,底釉被带至釉表面回填气泡排出后的凹坑,形成面釉白色与底釉褐色相间的花釉图纹.双层花釉的反应通过组分扩散和气泡搅动进行,且釉面效果主要在升温阶段形成. 相似文献
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生产高档卫生陶瓷,要使产品使用功能良好,造型美观,除此以外,企业还必须考虑产品釉面这个非常重要的因素,即釉面要光亮、和谐、颜色均一,无明显的釉面缺陷如缺釉、缩釉、釉缕、釉面波纹不平等。要达到这些目标,国内外同行除从改善釉配方着手以外,对喷釉方法也进行了许多探索。静电喷釉就是近年来在卫生陶瓷生产中出现的一种新的喷釉方法。 相似文献
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以熔块釉为基础釉,通过添加MnO2和CuO两种金属氧化物,成功制备了亮银灰色金属光泽釉。系统研究了MnO2与CuO的质量比K、加入量及冷却制度对釉面效果的影响,利用扫描电子显微镜(SEM)分析了釉层微观形貌。研究结果表明:(1)取2~3当CuO加入量为2.25~3%,MnO2为6~9%时,釉面出现高亮金属光泽。如果CuO含量低于1.5%,釉面不易出现金属光泽效果。MnO2的继续加入,有使釉面出现暗黑且无光的趋势;(2)快速冷却较随炉冷却更容易使釉面出现金属光泽效果;(3)快速冷却后试样釉层分布着亚微米级球状晶体,且平行于釉面规则生长,这极有可能是釉面出现高亮金属光泽的重要原因。 相似文献
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Undine Fischer Humberto Chaves Christos G. Aneziris Gert Schmidt 《International Journal of Applied Ceramic Technology》2015,12(1):81-94
Using a high‐speed and high‐resolution‐camera system of droplets in glaze sprays and their impact on the surface of a green ceramic body based on silicate tiles have been characterized. The influence of the surface tension of the glaze slips on the droplet size distribution and their wetting behavior on contact with the green silicate body surface have been investigated. The unfired glaze layers have been studied by means of scanning electron microscopy and computer tomography. The impact angle of the droplets as well as the size of the droplets is of great importance for a high glaze surface quality. 相似文献
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利用体视显微机和偏光显微镜对釉层显微结构进行观察,并做了性能测试,结合等静压成形以及生产实际,对釉面针孔的成因进行了讨论。通过分析对比.得出高气孔率的素坯是影响釉面针孔的重要因素;在进一步的试验中,提出了克服釉面针孔的合理途径并取得了一定成效。 相似文献
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Jose Luis Amorós Arnaldo Moreno Encarna Blasco Joaquin Javier Pérez Sandra Navarro Sandra Reverter 《International Journal of Applied Ceramic Technology》2019,16(6):2153-2160
Inkjet technology has become very popular in recent years and is nowadays widely used for decorating ceramic products. This has led to in-depth study of the operating principles and process variables involved. These notably influence the properties of the deposited ink layers, as do the physicochemical properties of the applied inks and of the glazes on which the inks are deposited. The problems associated with these factors are further heightened when inks with complex formulations designed to obtain special effects and specific surface properties are used. This study examines the characteristics of the interface that developed on applying an ink on a certain type of glaze, as well as the surface properties of the final product. The relationship of the amount of ink applied per unit area and the particle size distribution (PSD) of the glaze on which it was deposited to ink penetration into the glaze layer was also investigated. The resulting microstructures were observed by SEM, while the variation of glaze layer composition with distance to the surface was determined by SEM-EDS. The results obtained were successfully correlated with the porous texture of the unfired glaze (determined by SEM and mercury porosimetry) and with unfired glaze PSD. 相似文献
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通过调整RO,SiO2和Al2O3的含量,研制成功了以锆英石为主要乳浊剂、氧化锡为辅助乳浊剂的日用瓷复合生料乳浊釉.探索了各主要组分对釉面质量的影响。 相似文献