Chemical Synthesis of Ceramics Using Molecularly Modified Alkoxide Precursors

本文研究了新型混合氧化物溶胶-凝胶衍生陶瓷的合成与加工。该研究包括对控制前驱体同时水解的基本过程的全面检查，凝胶化和凝胶到陶瓷转化的动力学，以及最终产品的微观结构和电性能的表征。在前驱体的合成中，通过改变不同醇氧化合物的分子结构来控制它们的共水解。研究凝胶和转化过程的目的是建立前驱体的分子结构、所得凝胶的结构和转化过程中中间晶体结构之间的关系。对溶胶-凝胶过程的基本理解将导致新的和改进的电子和结构陶瓷应用。

This is a study of the synthesis and processing of novel mixed oxide sol-gel derived ceramics. The research involves a comprehensive examination of the fundamental processes controlling the simultaneous hydrolysis of precursors, the kinetics of gelation and gel to ceramic conversion, as well as the characterization of the microstructure and electrical properties of the final products. For the synthesis of the precursors the co-hydrolysis of different alkoxides will be controlled through the modification of their molecular structure. The objective of studying the gelation and conversion processes is to establish the relationship between the molecular structure of precursors, the structure of the resulting gels, and the structure of the intermediate crystallites during conversion. A fundamental understanding of the sol-gel process will lead to new and improved ceramics for electronic and structural applications.