陶瓷增白剂的研制

本研究以偏高岭石、锆英石和氧化铈等为主要原料研制增白剂.首先,通过正交试验法和单因素试验法优化确定出增白剂的最佳配方和最佳制备工艺.在此基础上,将增白剂添加到坯料中,考察了增白剂颗粒度、辅助原料以及烧成制度等因素对增白剂在坯体中增白效果的影响,从而研制出增白效果良好的坯体添加剂.试验研究表明:锆英石、偏高岭石和氧化铈等的引入及其添加量以及它们之间的配方比例会影响增白剂的增白效果;辅助原料滑石、锂辉石等的引入也有利于进一步提高坯体的白度;同时,滑石和锂辉石的引入还能降低坯体的烧成温度,减少能耗,锂辉石还能缩短烧成周期.另外,经研究发现,烧成温度及保温时间等其他因素也会对增白剂的增白效果产生影响.

RESEARCH ON THE PREPARATION OF CERAMIC WHITENING AGENT

The research developed a kind of whitening agent with the main materials of zircon, metakaolin, and CeO. First, the optimal formula and process of the whitening agent were determined by means of cross-section experiment and single-factor experiment. Then the whitening agent was added to the body materials, and the effects of its particle size, aid materials and firing system on the whitening result of the body were observed. Finally, the improved proportion of materials and technology were stated. The experiments showed that the amount of zircon, metakaolin, and CeO added and their proportion affected the whitening effect. The aid materials talc and spodumene not only helped increase the whiteness of the body, but also reduced the firing temperature and energy consumption. In addition, spodumene shortened the sintering cycle. The firing temperature and the soaking time also affected the property of the agent. The materials used in the research are plentiful and inexpensive. Their producing technologies are not complex and the scope of firing temperature is wide and easy to control. Therefore, it is profitable to apply the whitening agent to the production of construction ceramics.