作　　者： ; ; ; ; ;

机构地区： 华南理工大学材料科学与工程学院

出　　处： 《无机材料学报》 2013年第8期847-852,共6页

摘　　要： 以正硅酸乙酯和氧氯化锆为原料,采用溶胶共沉淀法制备了硅酸锆包裹炭黑复合粉体。利用XRD、SEM、色度计和粒度分析仪等手段对样品进行了表征。采用正交试验考察了前驱体pH值、煅烧温度、矿化剂种类和用量等工艺条件对复合粉体高温稳定性的影响。结果表明,矿化剂和煅烧温度是最重要的影响因素。最佳的工艺条件是前驱溶液pH为5、矿化剂为5wt%LiF、煅烧温度为1150℃。该工艺条件下形成的球形镶嵌结构能够有效防止炭黑被氧化。获得的硅酸锆包裹炭黑粉体具有较好的高温稳定性,粒度分布符合陶瓷色料的要求。该粉体用于熔块釉中,1000℃烧成仍然具有较好的发色效果。 Zircon encapsulated carbon black powders were synthesized by a co-precipitation method using TEOS and zirconium oxychloride as starting materials. X-ray diffraction （XRD）, scanning electronic microscope （SEM）, color- imeter and laser grain size analyzer were used to investigate the phase structure, morphology, thermal stability and size distribution of the prepared composite powders, respectively. The effect of experimental conditions including the pH of the precursor solution, the calcination temperature, the type and amount of mineralizers on their thermal stability was studied by orthogonal test. The optimal conditions were accordingly determined as follows： precursor solution pH=5, calcination temperature 1150℃ and 5% LiF mineralizer. Under these conditions, zircon encapsulated carbon black with embedded structures can be obtained. The composite powder has high thermal stability and adequate size distribution, and thus it is a good candidate material for black ceramic pigment. When calcined at 1000℃ in the frit glaze, the powder shows considerable tilting strength.

关 键 词： 包裹炭黑 硅酸锆 共沉淀法 高温稳定性

领　　域： [一般工业技术]