Dielectric parameters and a.c. conductivity of pure and doped poly (methyl methacrylate) films at microwave frequencies

Bulletin of materials science

P J Singh¹  Anju Tanwar¹  Y K Vijay²  K K Gupta¹ 

[1] Department of Physics, M.S.J. College, Bharatpur 321 001, India$$Department of Physics, M.S.J. College, Bharatpur 321 001, IndiaDepartment of Physics, M.S.J. College, Bharatpur 321 001, India$$;Department of Physics, University of Rajasthan, Jaipur 302 004, India$$Department of Physics, University of Rajasthan, Jaipur 302 004, IndiaDepartment of Physics, University of Rajasthan, Jaipur 302 004, India$$

关键词: Dielectric constant;    a.c. conductivity;    dielectric relaxation.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Dielectric properties of pure and doped poly (methyl methacrylate) (PMMA) films at microwave frequency, 8.92 GHz, have been studied at 35°C. Iodine, benzoic acid and FeCl₃ have been used as dopants. The losses in doped films are found to be larger than in pure PMMA films. The increased losses account for increased a.c. conductivity in doped films. The increase in conductivity is accounted due to creation of additional hopping sites for the charge carriers in doped samples. The dielectric data has also been used to evaluate optical constants, absorption index (𝐾) and refractive index (ð‘�??) of the films.

【 授权许可】

Unknown