三元体系Na_2SO_4-(NH_4)_2SO_4-H_2O中的Na_2SO_4·10H_2O-(NH_4)_2SO_4和Na_2SO_4·10H_2O-(NH_4)_2SO_4·Na_2SO_4·4H_2O多温截面图

POLYTHERSMAL SECTIONS Na_2SO_4·10H_2O-(NH_4)_2SO_4 AND Na_2SO_4·10H_2O-(NH_4)_2SO_4·Na_2SO_4·4H_2O IN THE Na_2SO_4-(NH_4)_2SO_4-H_2O SYSTEMS

本文对Na_2SO_4-(NH_4)_2SO_4-H_2O三元体系中的Na_2SO_4·10H_2O_-(NH_4)_2SO_4(Ⅰ)和Na_2SO_4·10H_2O-(NH_4)_2SO_4·Na_2SO_4·4H_2O(Ⅱ)两个多温截面进行了研究.在(Ⅰ)中有三个四相转熔点:P_1,38wt%(NH_4)_2SO_4,58.8℃;P_2,10.9 wt%(NH_4)_2SO_4,26℃;P_3,39.1 wt%(NH_4)_2SO_4,-16℃.在(Ⅱ)中有两个四相转熔点:P_1,100 wt%(NH_4)_2SO_4·Na_2SO_4·4H_2O,59℃;P_2,23.62 wt%(NH_4)_2SO_4·Na_2SO_4·4H_2O,26.1℃,转熔反应热为180 J/g。

This article dealt with the title poly thermal sections. In the Na_2SO_4·10H_2O-(NH_4)_2SO_4 section three quadruple peritectic points occur at 58.8℃ 38 wt% (NH_4)_2SO_4, 26℃, 10.9 wt%(NH_4)_2SO_4, and -16℃, 39.1 wt%(NH_4)_2SO_4, respectively. In the Na_2SO_4·10H_2O-(NH_4)_2SO_4·Na_2SO_4·4H_2O section there are two quadrupl peritectic points occurring at 59℃, 100 wt%(NH_4)_2SO_4·Na_2SO_4·4H_2O and 26.1℃, 23.62 wt% (NH_4)_2SO_4·Na_2SO_4·4H_2O. The ΔH_(trans) at 26.1℃ is 180 J/g.