摘要
六水氯化钙(CaCl_(2)·6H_(2)O)的相变温度约为29℃,相变潜热约180.0~190.8 J/g,因其潜热高,成本低,无毒等优点广泛应用于建筑材料中,但CaCl_(2)·6H_(2)O在实际应用中存在着储热性能差、衰减严重等缺点。通过差示扫描量热法(DSC)、原子力显微镜(AFM)、X射线衍射法(XRD)对比了CaCl_(2)·6H_(2)O在改性前后的潜热性能、形貌及晶体结构差异。结果表明,通过对CaCl_(2)·6H_(2)O的水含量进行精确调控,材料的相变潜热从158.6 J/g提升至194.8 J/g,潜热存储能力得到极大的提升。
Calcium chloride hexahydrate(CaCl_(2)∙6H_(2)O)has a phase change temperature of approximately 29℃ and a phase change latent heat of about 180.0-190.8 J/g.It is widely used in building materials owing to the high latent heat,low cost and non-toxicity.However,CaCl_(2)∙6H_(2)O has some disadvantages in practical applications,such as poor heat storage performances and serious degradation.Characterized by differential scanning calorimetry(DSC),atomic force microscopy(AFM)and X-ray diffraction(XRD),the latent heat storage capacities,morphologies,and structures of CaCl_(2)∙6H_(2)O before and after modification were compared.The results show that the latent heat storage capacity has been improved significantly,from the initial value of 158.6 J/g to 194.8 J/g,through precise water control in CaCl_(2)∙6H_(2)O.
作者
张生娣
曾金波
李翔
孙艳霞
任秀峰
董生德
祝绳龙
海春喜
申月
ZHANG Sheng-di;ZENG Jin-bo;LI Xiang;SUN Yan-xia;REN Xiu-feng;DONG Sheng-de;ZHU Sheng-long;HAI Chun-xi;SHEN Yue(Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources,Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Xining,810008,China;Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province,Xining,810008,China;University of Chinese Academy of Sciences,Beijing,100049,China)
出处
《盐湖研究》
CAS
CSCD
2023年第2期19-24,共6页
Journal of Salt Lake Research
基金
国家自然科学基金-柴达木盐湖化工科学研究联合基金(U1707603)
中国科学院“西部之光”计划“西部青年学者”A类项目
青海省重点研发转化计划项目(2020-GX-108)。
关键词
相变储能材料
水合盐
六水氯化钙
步进稀释法
潜热存储能力
Phase change materials
Hydrated salt
Calcium chloride hexahydrate
Step dilution method
Latent heat storage capacity
