Preparation of high dielectric constant thin films of CaCu3Ti4O12 by sol�?�gel

Bulletin of materials science

Devendra P Singh¹  Y N Mohapatra²  Deepam Maurya¹  D C Agrawal¹ 

[1] Materials Science Programme, Indian Institute of Technology, Kanpur 208 016, India$$Materials Science Programme, Indian Institute of Technology, Kanpur 208 016, IndiaMaterials Science Programme, Indian Institute of Technology, Kanpur 208 016, India$$;Department of Physics, Indian Institute of Technology, Kanpur 208 016, India$$Department of Physics, Indian Institute of Technology, Kanpur 208 016, IndiaDepartment of Physics, Indian Institute of Technology, Kanpur 208 016, India$$

关键词: Solâ€�?�gel preparation;    thin film;    electrical properties.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Preparation of solâ€�?�gel derived CaCu₃Ti₄O₁₂ (CCTO) thin films using two different sols and their characterization including their dielectric response are reported. The properties of CCTO films depend heavily on solvents used to prepare the sols. Dielectric constant as high as ∼900 at 100 kHz could be obtained when acetic acid was used to prepare the sol; in contrast, use of hexanoic acid in the sol yielded films with a much lower dielectric constant. The variation in grain and grain boundary conductivities with temperature has been measured. Activation energies of 0.08 eV and 0.68 eV have been found for grain and grain boundary conduction, respectively.

【 授权许可】

Unknown