Thermal Decomposition and Recovery Behaviors of Layered Gadolinium Hydroxychloride

详细信息    查看全文

• 作者：Seoung-Soo Lee ; Byung-Il Lee ; Seung-joo Kim ; Song-Ho Byeon ; Jun-Kun Kang
• 刊名：Inorganic Chemistry
• 出版年：2012
• 出版时间：October 1, 2012
• 年：2012
• 卷：51
• 期：19
• 页码：10222-10232
• 全文大小：640K
• 年卷期：v.51,no.19(October 1, 2012)
• ISSN：1520-510X

文摘

The thermal behavior of gadolinium hydroxychloride (Gd₂(OH)₅Cl路nH₂O, LGdH) has been closely studied to provide the important factors that should be considered for its high temperature applications. Combined analyses of thermogravimetry-differential scanning calorimetry-mass spectrometry (TG-DSC-MS) showed that, under atmospheric air with a considerable amount of water, the decomposition of LGdH to Gd₂O₃ is completed at 1050 掳C. However, in either dry air or Ar gas, the transformation continued up to around 1300 掳C. Thus, the thermal decomposition of LGdH was more influenced by H₂O than by O₂. FT-IR spectra and X-ray diffraction (XRD) patterns were used to study LGdHs calcined at high temperatures (up to at least 600 掳C). Calcined LGdH鈥檚 ability to intercalate anions into the interlayer space could be recovered by the reconstruction of intralayer structure through rehydration and rehydroxylation. These processes were significantly accelerated at elevated temperatures. The recovery behavior of LGdH was examined in different anionic solutions at different temperatures.