碳粉改性Al基氮化铝核壳相变蓄热材料热性能研究  

Study on Thermal Properties of Carbon Powder Modified Aluminum-based AlN Core-shell Phase Change Thermal Storage Material

作　　者：陈敬 陈玉[1] 李明[1,2] 王云峰 杨亮糯[1] 顾振华 CHEN Jing;CHEN Yu;LI Ming;WANG Yunfeng;YANG Liangnuo;GU Zhenhua(Solar Energy Research Institute,Yunnan Normal University,Kunming 650500,China;Key Laboratory of Solar Heating and Cooling Technology of Yunnan Provincial Universities,Kunming 650500,China)

机构地区：[1]云南师范大学太阳能研究所,云南昆明650500 [2]云南省高校太阳能供热与制冷重点实验室,云南昆明650500

出　　处：《云南师范大学学报(自然科学版)》2025年第1期62-67,共6页Journal of Yunnan Normal University:Natural Sciences Edition

基　　金：国家自然科学基金资助项目(52266008,52464057);云南省基础研究专项面上资助项目(202301AT070067);教育部产学合作协同育人资助项目(231101283210300).

摘　　要：针对熔融盐高温蓄热材料在相变过程中的泄露腐蚀问题,采用碳粉复合氮化法制备了铝基核壳结构相变蓄热材料,通过热性能实验并结合多种表征手段,研究了碳粉比例对材料核壳结构的影响.结果发现:添加碳粉能够降低氮化反应温度,实现低温制备Al@AlN-Al_(2)O_(3)核壳材料;添加碳粉后,在800℃煅烧温度条件下出现明显的AlN物相,且碳粉占比为10%时所制备的蓄热材料具有最佳的蓄热性能,熔融焓达307.07 J/g,50次热循环后熔融焓仅下降4.69%.Aiming at the problem of leakage and corrosion of current high-temperature heat storage materials,the aluminum-based core-shell structure phase change thermal storage material was prepared by carbon powder composite nitriding method.It was found that the carbon powder composite nitriding method could realize the preparation of Al@AlN-Al_(2)O_(3) phase-change core-shell materials at low temperature.After the addition of carbon powder,the obvious AlN phase was found at 800℃,and the thermal storage material prepared when the carbon powder proportion was 10% had the best thermal storage performance,the enthalpy of melting was 307.07 J/g,and the enthalpy of melting was only reduced by 4.69% after 50 thermal cycles.

关 键 词：Al@AlN-Al_(2)O_(3) 核壳结构 相变材料 低温氮化 

分 类 号：TK02[动力工程及工程热物理]