| KNO3-KCl二元熔盐体系相图的研究 |
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| 引用本文： | 张启运,李文化. KNO3-KCl二元熔盐体系相图的研究[J]. 高等学校化学学报, 1982, 3(4): 443-446 |
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| 作者姓名： | 张启运 李文化 |
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| 作者单位： | 北京大学化学系(张启运)，北京大学化学系(李文化) |
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| 摘 要： | 目测变温法,差热分析法,配合X射线粉末相分析研究了KNO3-KCl体系的状态图。体系中有固液异组成化合物KNO3·KCl生成。它在359℃熔化分解为KCl和转熔点液相P。其组成含KCl 12.5Wt%。此化合物在124℃和271℃分别发生两次多晶转变。化合物与KNO3在含KCl 5.0%处形成低共熔点E,其温度为318℃。体系中可能存在介稳化合物4KNO3·KCl,它在342℃熔化分解。
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| 收稿时间： | 1981-05-22 |
A STUDY ON THE PHASE DIAGRAM OF BINARY SALTS SYSTEM KNO3-KCl |
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| Zhang Qiyun,Li Wenhua. A STUDY ON THE PHASE DIAGRAM OF BINARY SALTS SYSTEM KNO3-KCl[J]. Chemical Research In Chinese Universities, 1982, 3(4): 443-446 |
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| Authors: | Zhang Qiyun Li Wenhua |
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| Affiliation: | Department of Chemistry, Peking University, Beijing |
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| Abstract: | Astudy has been made of binary salts'system KNO3-KCl by the methods of DTA, visual polythermal and X-ray powder diffraction. An incongruently melting compound KNO3·KCl which decomposes at 359℃ andtransittes at 124℃ and 271℃ has been found in the system. Peritectic point of this compound lies in the composition containing 12.5wt% KCl. The values of the eutectic between KNO3 and KNO3·KCl are 318℃ and 5.0wt% KCl. Another metastable compound 4KNO3 KCl incongruently melting at 342℃ may also existes in this system. From the results of DTAand X-ray diffraction, no evidence was found for solid solution on the both sides of KNO3 and KCl. |
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