【摘要】 对１０水碳酸钠结晶水溶解氯化铵、硝酸铵、硫氰酸铵的制冷效果进行研究，结果表明，当氯化铵、硝酸铵、硫氰酸铵和１０水碳酸钠的质量比分别为２：３时，体系冷却效果较好，体系保持在零度以下的时间可持续６小时左右．更多还原

【Abstract】 Studies on the freezing effect of the Ammonium Chloride.Ammonium Nitrate and Ammonium thiocyanate respectly disolving in the crystal water of the sodium carbonate decahydrate.When Ammonium Salt:sodium carbonate decahydrate equal to 2:3,A better freez￣ing effect can be abtained.The temperature of the system was keeped below 0℃ about 6hr.更多还原