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二氧化钚纳米晶体晶粒生长的动力学研究。

Kinetic study on the grain growth of PuO nanocrystals.

作者信息

Bouëxière Daniel, Popa Karin, Walter Olaf, Cologna Marco

机构信息

European Commission, DG Joint Research Centre, JRC-Karlsruhe P. O. Box 2340 76125 Karlsruhe Germany

出版信息

RSC Adv. 2019 Feb 25;9(12):6542-6547. doi: 10.1039/c8ra10430a. eCollection 2019 Feb 22.

DOI:10.1039/c8ra10430a
PMID:35518472
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9060958/
Abstract

Kinetic measurements on the grain growth of PuO nano-crystals are presented. On the basis of isothermal XRD measurements at temperatures of 820 °C, 900 °C, 1000 °C, and 1100 °C the activation energy for the crystallite growth of PuO nanopowder is determined as 351(5) kJ mol in the temperature range from 820 to 1000 °C. Modelling shows that in this range growth happens likely through surface diffusion.

摘要

本文给出了对PuO纳米晶体晶粒生长的动力学测量结果。基于在820℃、900℃、1000℃和1100℃温度下的等温XRD测量,确定了PuO纳米粉末微晶生长在820至1000℃温度范围内的活化能为351(5)kJ/mol。模型表明,在此温度范围内,生长可能通过表面扩散发生。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c23f/9060958/f36dce98455c/c8ra10430a-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c23f/9060958/5f9976236ab9/c8ra10430a-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c23f/9060958/444b7ffa235d/c8ra10430a-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c23f/9060958/883bd41c10a2/c8ra10430a-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c23f/9060958/42f1d94db029/c8ra10430a-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c23f/9060958/f36dce98455c/c8ra10430a-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c23f/9060958/5f9976236ab9/c8ra10430a-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c23f/9060958/444b7ffa235d/c8ra10430a-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c23f/9060958/883bd41c10a2/c8ra10430a-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c23f/9060958/42f1d94db029/c8ra10430a-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c23f/9060958/f36dce98455c/c8ra10430a-f5.jpg

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