Influence of chelation ratio of metal alkoxides on aging of PZT 53/47 sol–gel-based precursors

Bulletin of Materials Science

关键词: Sol–gel;    dynamic light scattering;    PZT;    aggregation kinetics;    colloidal dispersion;    chelating agent.;   

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

The high reactivity of metal alkoxides, common starting reagents in sol–gel-based synthesis routes, generally demands the use of chelating agents in order to avoid fast hydrolysis and also to allow an easier manipulation of intermediates as well as final solutions. Under these conditions, stability issues sometimes can be linked to chelation issues that, therefore, should deserve a proper study suited to the material system of interest and, more specially, when considering the use of sol–gel-based precursors in research, small-scale applications and industry. In this work, we explore the sol–gel-based synthesis route of lead zirconate titanate (Pb(Zr0.53Ti0.47)O3 or PZT 53/47) using acetylacetone-chelated propoxides as intermediate reactants. Our main purpose here is to analyse the influence of the alkoxides:acetylacetone chelation ratio on the time evolution of mean particle size in the resultant organic colloidal dispersion used as PZT precursor. Purposely, we explored three different scenarios for chelation:

【 授权许可】

CC BY