| Mg-Al-CO3与Zn-Al-CO3水滑石热稳定性差异的研究 |
| Study of the Differences of Thermal Stability of Mg-Al-CO3 and Zn-Al-CO3 Hydrotalcite |
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| 摘要: |
| 关键词: Mg-Al-CO3水滑石 Zn-Al-CO3水滑石 热稳定性差异 |
| 基金项目: 中国石化总公司资助项目(No.X599012). |
| Abstract: The structures of Mg-Al-CO3 and Zn-Al-CO3 hydrotalcites have been studied by means of XRD,IRand TG-DTA.Although both have the same crystal structures,their thermal stabilities are quite different.During the thermal decomposition process,Mg-Al-CO3 hydrotalcite exhibits two steps- desorption of interlayer water occurs at 200℃,followed by dehydroxylation of the brucite-like layers and loss of carbonate at 400℃,Zn-Al-CO3 hydrotalcite decomposes in one step-the desorption of interlayer water, structural water and carbon dioxide occurred at the same time at 200℃ . The results of a theoretical study indicate that the bond strengths of OH-CO3-OHand OH-H2O-CO3-OH in Mg-Al-CO3 hydrotalcite are stronger than those in Zn-Al-CO3 hydrotalcite.It has been shown that the thermal stability of Mg-Al-CO3 hydrotalcite is higher than that of Zn-Al-CO3 hydrotalcite. |
| Keywords: Mg-Al-CO3 hydrotalcite Zn-Al-CO3 hydrotalcite thermal stability difference |
| 投稿时间：2000-05-29 修订日期：2000-10-20 |
| 摘要点击次数: 1889 |
| 全文下载次数: 1964 |
| 李蕾,张春英,矫庆泽,段雪.Mg-Al-CO3与Zn-Al-CO3水滑石热稳定性差异的研究[J].无机化学学报,2001,17(1):113-118. |
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