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BULLETIN OF THE CHINESE CERAMIC SOCIETY ›› 2026, Vol. 45 ›› Issue (4): 1378-1385.DOI: 10.16552/j.cnki.issn1001-1625.2025.0918

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Determination of Crystallization Rate in Simulated High Level Radioactive Waste Glass

HAN Wei1(), GUO Zijian1, CUI Zhu2, LI Xinyang1, CAI Hanmei1, JIAO Yunjie2, WANG Xiaoyun1, GUO Zhongbao1()   

  1. 1.China Testing & Certification International Group Co. ,Ltd. ,Beijing 100024,China
    2.China Building Materials Academy Co. ,Ltd. ,Beijing 100024,China
  • Received:2025-09-15 Revised:2025-10-19 Online:2026-04-20 Published:2026-05-14
  • Contact: GUO Zhongbao

Abstract:

Crystallization rate serves as a critical indicator for assessing the thermal performance of high level radioactive waste glass, reflecting their crystallization propensity. However, due to the predominantly complex amorphous phase of high level radioactive waste glass, the proportion of crystalline substances generated during heat treatment is negligible, making accurate quantification of their content extremely challenging. This study utilized XRD Rietveld whole-pattern fitting refinement to analyze the crystalline phase composition of simulated high level radioactive waste glass. Additionally, it systematically examined factors that influence the accuracy of crystallization rate determination, including internal standards and scanning rates. The results demonstrate that utilizing the XRD Rietveld whole-pattern fitting refinement method with zinc oxide as the internal standard and a scanning rate of 1 (°)/min, the precision of crystallization rate exhibits less than 5%. The recovery rates for various crystalline phase content and crystallization rate range between 98% and 108%. The method is accuracy and reliability.

Key words: simulated high level radioactive waste glass, crystallization rate, X-ray diffraction method, Rietveld full-spectrum fitting, internal standard

CLC Number: