X-ray determination of crystallite size and effect of lattice strain on Debye�?�Waller factors of platinum nano powders

Bulletin of materials science

N Gopi Krishna¹  E Purushotham¹ 

[1] Department of Physics, Kakatiya University, Warangal 506 009, India$$Department of Physics, Kakatiya University, Warangal 506 009, IndiaDepartment of Physics, Kakatiya University, Warangal 506 009, India$$

关键词: X-ray diffraction;    lattice strain;    crystallite size;    Debyeâ€�?�Waller factor;    vacancy formation energy.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

In the present study, nano platinum particles were produced by ball milling process. The lattice strains in platinum (Pt) powders produced by milling have been analysed by X-ray powder diffraction. The lattice strain (�?) and Debye-Waller factor (𝐵) are determined from the half-widths and integrated intensities of the Bragg reflections. In Pt, the Debye�?�Waller factor is found to increase with lattice strain. From the correlation between the strain and effective Debye�?�Waller factor, the Debye�?�Waller factors for zero strain have been estimated for Pt. The variation of energy of vacancy formation as a function of lattice strain has been studied.

【 授权许可】

Unknown