氯化钾铵混晶组成的研究  

Phase composition of potassium ammonium chloride solid solution

作　　者：袁俊生[1,2] 季香[2] 刘燕兰[1,2] 钊妍[1,2] 陈建新[1,2] 

机构地区：[1]海水资源高效利用化工技术教育部工程研究中心河北工业大学,天津300130 [2]河北工业大学,天津300130

出　　处：《化工矿物与加工》2010年第5期1-5,共5页Industrial Minerals & Processing

基　　金：国家科技支撑计划项目(2006BAB03A10);河北省教育厅重点项目(No.ZH200807);天津市自然科学基金(No.10JCYBJC04300);河北省自然科学基金(B2010000042)

摘　　要：测定了25℃时KCl-NH4Cl-H2O三元体系的相平衡数据,绘制了相应的相图。采用恒速冷却的方法制备出不同比例的固溶体mNH4Cl.KCl和NH4Cl.nKCl(m,n≥1),并分别对这些固溶体晶体进行XRD、FTIR和SEM表征,获得了晶胞参数。结果表明,该三元体系存在纯NH4Cl、mNH4Cl.KCl和NH4Cl.nKCl固溶体结晶区;两类固溶体均属于立方晶系,晶相组成的数量均趋向于无穷,并发现在mNH4Cl.KCl中,少量的K+取代NH4+,会使晶体沿(010)面生长。The equilibrium solubility of the ternary system KCl - NH4Cl - H20 were determined at 25 ℃ and the corre.sponding phase diagram was constructed. The two kinds of solid solutions of m NH4 Cl-KCI and NH4Cl＋ nKCl were prepared by a method of constantcooling-rate and characterized by XRD, FTIR and SEM, and the corresponding cell parameters were determined. The results show that in the ternary system there are three crystal areas of pure NH4 Cl, mNH4Cl·KCl solid solution and NH4 Cl·nKCl solid solution; both solid solutions belong to cubic crystal system and the numbers of the crystal phase composition tend to infinity. When a spot of NH4^＋ was replaced by K^＋ , the growth of mNH4Cl-KCl crystal was devel- oped along the （010） crystal face.

关 键 词：氯化钾铵 混晶 晶相组成 

分 类 号：TQ131[化学工程—无机化工]