对无机蓄热材料磷酸氢二钠性能的改进  

Improvement for heat-storing performance of two-sodium phosphoric acid hydrogen

作　　者：于长顺[1] 王岩[1] 尹宇新[1] 刘学[1] 

机构地区：[1]大连轻工业学院化工与材料学院,辽宁大连116034

出　　处：《大连轻工业学院学报》2004年第4期246-248,共3页Journal of Dalian Institute of Light Industry

摘　　要：无机蓄热材料过冷现象比较普遍,本文报道对磷酸氢二钠作为低温蓄热材料的性能改进实验研究。加入适量的抗过冷剂(成核剂)和抗沉淀剂。分析不同比例试样放热的步冷曲线。通过示差扫描量热(DSC)法,计算和综合评估玻璃化转移温度、相变温度及相变热。结果表明磷酸氢二钠蓄热材料相变温度在49～57℃,相变时间可达10～22min。Overcooling phenomena are generally encountered for inorganic heat-storing materials This paper reports the investigation for performance improvement of the two-sodium phosphoric acid hydrogen as low-temperature heat-storing material, by adding overcooling- resistance agent ( nucle-forming agent ) and precipitating-resistance agent. The cooling-step curves of the exothermicity for samples with different proportion of additives are analyzed. Employing the Difference Scanning Calibration ( DSC ) method, the glassization shift- temperature and the phase transition temperature and heat are calculated. and appraised It reveals that the range of phase transition temperature and time of the two-sodium phosphoric acid hydrogen are 49-57?℃and 10-22?min, respectively.

关 键 词：磷酸氢二钠 蓄热材料 成核剂 沉淀剂 DSC 性能 相变热 相变温度 过冷 试样 

分 类 号：TS102.33[轻工技术与工程—纺织工程] TQ247.51[轻工技术与工程—纺织科学与工程]