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| Equilibrium between NO_3~- and NO_2~- in KNO_3–NaNO_2 melts:a Raman spectra study | |
| 作者姓名： | Xianwei Hu Zongxin Yu Bingliang Gao Zhongning Shi Jiangyu Yu Zhaowen Wang |
| 作者单位： | Xianwei Hu:School of Materials and Metallurgy, Northeastern University, Shenyang 110819, ChinaEngineering Research Center for Process Technology of Nonferrous Metallurgy, Ministry of Education, Shenyang 110819, China Zongxin Yu:School of Materials and Metallurgy, Northeastern University, Shenyang 110819, ChinaEngineering Research Center for Process Technology of Nonferrous Metallurgy, Ministry of Education, Shenyang 110819, China Bingliang Gao:School of Materials and Metallurgy, Northeastern University, Shenyang 110819, ChinaEngineering Research Center for Process Technology of Nonferrous Metallurgy, Ministry of Education, Shenyang 110819, China Zhongning Shi:School of Materials and Metallurgy, Northeastern University, Shenyang 110819, ChinaEngineering Research Center for Process Technology of Nonferrous Metallurgy, Ministry of Education, Shenyang 110819, China Jiangyu Yu:School of Materials and Metallurgy, Northeastern University, Shenyang 110819, ChinaEngineering Research Center for Process Technology of Nonferrous Metallurgy, Ministry of Education, Shenyang 110819, China Zhaowen Wang:School of Materials and Metallurgy, Northeastern University, Shenyang 110819, ChinaEngineering Research Center for Process Technology of Nonferrous Metallurgy, Ministry of Education, Shenyang 110819, China |
| 基金项目： | This work was financially supported by the National Natural Science Foundation of China （No. 51004034） and the Fundamental Research Funds for the Central Universities of China （No. N130402018）. |
| 摘 要： | We study ionic structure of KNO3–NaNO2 melts under air atmosphere by using Raman spectroscopy. Molar fraction of NO--3 and NO2 is obtained and thermal stability of this kind of melts system is then analyzed. The results show that when the temperature is increased to a certain value, equilibrium between the decomposition of NO-3 and the oxidation of NO-2 exists in KNO3–NaNO2 melts. When temperature is higher than 644 K, the molar fraction of NO-3 decreases a little with temperature increasing for the melts in which the initial fraction of KNO3 is 90 wt%, but for the melts in which the initial fraction of KNO3 is 10–80 wt%, the molar fraction of NO-3 increases with temperature, and the increasing rate is slower for a higher initial fraction of KNO-3. Molar fraction of NO3 increment increases linearly with initial fraction of NaNO2. The sample in which the initial fractions of NaNO2 are 11.3 and 14.5 wt% under air atmosphere shows the best thermal stability at 762 and 880 K, respectively. |
| 关 键 词： | NO2- 亚硝酸钠 拉曼光谱 平衡分析 摩尔分数 温度升高 融化 空气气氛 |
| 收稿时间： | 2014/4/6 |
Equilibrium between NO3- and NO2- in KNO3–NaNO2 melts: a Raman spectra study |
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| Xianwei Hu,Zongxin Yu,Bingliang Gao,Zhongning Shi,Jiangyu Yu,Zhaowen Wang.Equilibrium between NO3- and NO2- in KNO3–NaNO2 melts: a Raman spectra study[J].中国光学快报(英文版),2014,12(9):93001-100. | |
| Institution: | [1]School of Materials and Metallurgy, Northeastern University, Shenyang 110819, China; [2]Engineering Research Center for Process Technology of Nonferrous Metallurgy, Ministry of Education, Shenyang 110819, China |
| Abstract: | |
| Keywords: | 300 6450 290 5860 |
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