(1. 包頭鋼鐵學院 生物與化學工程系, 包頭 014010;
2.包頭鋼鐵學院 冶金 工程研究所, 包頭 014010)
摘 要: 利用差熱分析法研究了EuCl3-KCl二元系相圖,發(fā)現(xiàn)該體系有兩個固液同組成化合物EuCl3·3KCl和2EuCl3·KCl,體系相變點分別為765℃,EuCl3 25%(摩爾分數(shù))和555℃,EuCl3 66.7%(摩爾分數(shù)); 一個異分熔化化合物EuCl3·2KCl,轉熔點為564℃,EuCl3 42%(摩爾分數(shù));3個低共熔點分別為650℃, EuCl3 12%(摩爾分數(shù)),500℃,EuCl3 55%(摩爾分數(shù))和490℃,EuCl3 85%(摩爾分數(shù))。 同時探討了相圖的某些規(guī)律。
關鍵字: EuCl3-KCl;二元體系;相圖;相圖規(guī)律
EuCl3-KCl
(1. Department of Biological and Chemical Engineering,Baotou University of
Iron and Steel Technology Baotou,Baotou 014010,China;
2.Institute of Metallurgical Engineering,Baotou University of Iron and
Steel Technology Baotou,Baotou 014010,China)
Abstract:The phase diagram of binary system EuCl3-KCl is investigated by DTA. In the EuCl3·KCl system the milting points of the two congruent compounds EuCl3·3KCl and 2EuCl3·KCl are 765℃ with EuCl3 25%(mole fraction) and 555℃ with EuCl3 66.7% respectively, aperitectic point of the incongruent compound EuCl3·2KCl is 564℃ with EuCl3 42% and three eutectic points are 650℃ with EuCl3 12%,500℃ with EuCl3 55% and 490℃ with EuCl3 85% respectively. Some rules of the phase diagram are also explored.
Key words: EuCl3-KCl;binary system;phase diagram;rule of phase diagram


