硅渣玻璃陶瓷的制备和性能研究

发布时间：2018-06-10 19:07

  本文选题：硅渣 + 玻璃陶瓷　； 参考：《山东建筑大学》2015年硕士论文

【摘要】：随着世界经济的快速发展,石油产品需求量越来越大,石油催化裂化催化剂行业快速增长,加大了石油催化剂废渣一硅渣的排放堆积量。硅渣占用了大量的土地,污染了环境,危害了人类的生存。因此,如何有效的处理硅渣成为了一项急需解决的课题。本文工作是用硅渣制备玻璃陶瓷,研究晶核剂对硅渣基础玻璃析晶行为的影响,通过分析不同种类和含量的晶核剂对硅渣玻璃陶瓷的物相和性能的影响,确定最佳晶核剂和最佳含量。其次研究硅渣玻璃陶瓷的析晶动力学和结晶行为的研究,利用差热分析技术(DTA),计算析晶动力学参数,预测判断硅渣基础玻璃的析晶能力,并解释其析晶行为。然后研究热处理温度和时间对硅渣玻璃陶瓷的物相、显微结构和性能的影响,利用X射线衍射仪(XRD)和扫描电子显微镜(SEM)技术分析了温度和时间对物相、显微结构的影响,测试、分析不同热处理温度和时间下的抗折强度、显微硬度等性能,确定最佳热处理温度和时间。其次研究硅渣含量对硅渣玻璃陶瓷物相、显微结构和性能的影响,通过分析XRD图谱和SEM图片,解释其性能的变化,确定最佳硅渣用量。研究结果表明：硅渣玻璃陶瓷最佳成核剂是Ti02,最佳含量为5%；随着硅渣含量的增加,析晶化学能E逐渐增加,表明其析晶能力逐渐下降；随着热处理温度的升高,各组硅渣玻璃陶瓷的晶相含量逐渐增加,到达某一温度后,增加速率减小,XRD图谱峰值不再显著增加,微观结构均为球状颗粒,平均直径逐渐增大；在最佳热处理温度900℃时,微观结构最为致密；随着热处理时间的延长,各组硅渣玻璃陶瓷的晶相含量逐渐增加,增加速率减小,XRD图谱峰值不再显著增加,微观结构均为球状颗粒,平均直径逐渐增大,在最佳热处理时间1.5h时,微观结构最为致密；随着硅渣含量的增加,晶相含量逐渐减少,晶粒形态均匀球状,平均直径逐渐减小,微观结构在硅渣含量70%时最为致密。通过研究和分析,硅渣玻璃陶瓷在经过最佳热处理温度900℃和时间1.5h之后,玻璃陶瓷性能最优：抗折强度值为295.2MPa；显微维氏硬度值为989.72MPa；抗化学腐蚀性为0.09%;密度值为2.78 g/cm3。研究得出硅渣利用率最高为90%,此时抗折强度值为123.3MPa；显微维氏硬度值在为640.1MPa；抗化学腐蚀性为0.34%；密度值为2.51g/cm3。
[Abstract]:With the rapid development of the world economy, the demand for petroleum products is increasing, and the petroleum catalytic cracking catalyst industry is growing rapidly. Silicon slag occupies a lot of land, pollutes the environment and endangers the survival of human beings. Therefore, how to deal with silicon slag effectively has become an urgent problem. In this paper, glass ceramics were prepared from silicon slag. The effect of nucleating agent on the crystallization behavior of silicon slag based glass was studied. The effects of different kinds and contents of nucleating agents on the phase and properties of silicon slag glass ceramics were analyzed. Determine the optimum nucleating agent and content. Secondly, the crystallization kinetics and crystallization behavior of silicon slag glass ceramics were studied. The crystallization kinetics parameters were calculated by differential thermal analysis (DTA), the crystallization ability of the glass was predicted and the crystallization behavior was explained. Then the effects of heat treatment temperature and time on the phase, microstructure and properties of silicon slag glass ceramics were studied. The effects of temperature and time on the phase and microstructure of the glass ceramics were analyzed and tested by means of X-ray diffractometer (XRD) and scanning electron microscopy (SEM). The flexural strength, microhardness and other properties of different heat treatment temperature and time were analyzed, and the optimum heat treatment temperature and time were determined. Secondly, the effect of silicon slag content on the phase, microstructure and properties of silicon slag glass ceramics was studied. By analyzing XRD and SEM pictures, the change of properties was explained and the optimum amount of silicon slag was determined. The results show that the optimum nucleating agent is Ti02 and the optimum content is 5.The crystallization chemical energy E increases gradually with the increase of silicon slag content, which indicates that the crystallization ability decreases gradually with the increase of heat treatment temperature. The crystalline phase content of the silicon slag glass-ceramics increased gradually, and the peak value of XRD spectra of increasing rate decreased no longer significantly, the microstructure was spherical particles, and the average diameter increased gradually at the optimum heat treatment temperature of 900 鈩，

本文编号：2004285