有机—无机掺杂改善陶瓷原料性能的研究

发布时间：2018-01-26 00:29

本文关键词： 可塑性无机改性有机添加剂废瓷粉　出处：《大连工业大学》2015年硕士论文　论文类型：学位论文

【摘要】：粘土作为陶瓷生产中的主要原料,其掺入量多达40%-60%。我国可以说是世界上最早开发利用高塑性粘土的国家,而粘土作为一种不可再生资源因千百年的开发利用已越来越少,大量高塑性粘土将要开发殆尽,很多低可塑性粘土又因塑性太小而达不到工业生产要求。辽宁喀左地区含有丰富的紫砂石,但由于其可塑性较低,长久以来得不到人们的重视,开发利用程度较低;陶瓷制品在实际生产中会不可避免的产生大量的废瓷,但是多数废瓷被填埋在垃圾场,只有小部分的废瓷被回收利用制成再生陶瓷。我国采用传统方法在陶瓷原料中对废瓷粉的掺入量仅在5%左右。因此,对粘土塑性及废瓷粉的回收利用的研究具有重要意义。本实验针对如何提高粘土可塑性及废瓷粉掺入量做了大量实验,得出以下结论:1、无机改性(淋漓、蒸发过程;阳离子掺杂)的方法虽能在一定范围内提高泥料的可塑性,但其提高程度不大,改善后的陶瓷原料仍不能满足工业生产中对陶瓷原料性能的要求。2、有机(柠檬酸三钠、羧甲基纤维素钠、十二烷基磺酸钠)添加剂的掺入能大大提高陶瓷原料的可塑性,降低泥浆粘度,增加坯体的干燥强度及收缩率,略微增加烧成试样的吸水率和气孔率,改善后的陶瓷原料能够满足工业要求。3、综合考虑三种有机添加剂对陶瓷原料性能的影响,掺入0.2wt.%柠檬酸三钠的效果最好。此时原料的可塑性指标为2.58kg?cm,泥浆粘度为107mPa?s,干燥强度为1.714MPa,收缩率为7.34%,吸水率为7.15%,气孔率为15.12%。4、对有机掺杂改性的实用化应用进行了初步研究,试验结果表明:掺入0.2wt.%的柠檬酸三钠后,唐山隆达公司在骨质瓷泥料中对废瓷粉的掺入量可从3%提高到7%。此时配合料的可塑性指标为2.52kg·cm,干燥强度为3.139MPa,收缩率为12.53%,吸水率为2.50%,气孔率为4.32%,白度为87.71%,符合骨质瓷的行业要求。
[Abstract]:Clay is the main raw material in ceramic production, and its mixing amount is up to 40- 600.China can be said to be the first country in the world to develop and utilize high-plastic clay. As a kind of non-renewable resources, clay has been less and less developed for thousands of years, and a large number of high-plastic clay will be developed completely. Many low plasticity clay is too small to meet the requirements of industrial production. Liaoning Kazuo area is rich in purple sand, but because of its low plasticity, it has not been paid attention to for a long time. The degree of exploitation and utilization is low; Ceramic products in the actual production will inevitably produce a large number of waste porcelain, but most of the waste porcelain is buried in the garbage dump. Only a small part of the waste porcelain is recycled into regenerated ceramics. In China, the amount of waste ceramic powder is only about 5% by the traditional method. It is of great significance to study the plasticity of clay and the recovery and utilization of waste porcelain powder. This experiment has done a lot of experiments on how to improve the plasticity of clay and the amount of waste porcelain powder. The following conclusions are drawn: 1, inorganic modification (dripping dripping). Evaporation process; Although the cationic doping method can improve the plasticity of the slurry within a certain range, the improved ceramic raw material can not meet the requirements of the ceramic material properties in industrial production. 2. The addition of organic additives (trisodium citrate, sodium carboxymethyl cellulose, sodium 12 alkyl sulfonate) can greatly improve the plasticity of ceramic raw materials, reduce the viscosity of slurry, increase the drying strength and shrinkage of the body. Slightly increase the water absorption and porosity of the fired samples, the improved ceramic raw materials can meet the industrial requirements. 3. The effects of three organic additives on the properties of ceramic raw materials are considered synthetically. The effect of adding 0.2 wt.% trisodium citrate was the best. The plasticity index of the raw material was 2.58 kg? Cm, mud viscosity is 107 MPA? S, the drying strength is 1.714 MPA, the shrinkage is 7.34, the water absorption is 7.15, and the porosity is 15.12.4. the practical application of organic doping modification is studied preliminarily. The results showed that the sodium citrate was mixed with 0.2 wt.% trisodium citrate. The dosage of waste porcelain powder can be increased from 3% to 7 by Tangshan Longda Company. The plasticity index and drying strength are 2.52kg 路cm and 3.139MPa respectively. The shrinkage rate was 12.53, the water absorption rate was 2.50, the porosity was 4.32, and the whiteness was 87.71, which was in line with the requirements of bone porcelain industry.
【学位授予单位】：大连工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ174.4

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