Preparation and properties of Al/Al2O3 core-shell microencapsulated phase change material

doi:10.1016/j.jallcom.2021.161606

	Preparation and properties of Al/Al2O3 core-shell microencapsulated phase change material
	Li, Qinglin 2; Ma, Xiaodong 2; Zhang, Xiaoyu 1; Ma, Jiqiang 2; Liu, Jiaolong 2; Hu, Xiaowu 3; Lan, Yefeng 2
刊名	Journal of Alloys and Compounds
	2021-12-25
卷号	888
关键词	Aluminum oxide Corundum Crystal structure Durability Energy policy Historic preservation Latent heat Melting Microencapsulation Morphology Phase change materials Storage (materials) Waste heat Boehmite precipitation Core shell Energy crisis Highest temperature Industrial development Latent heat storage Micro-encapsulation OH$+-$ Phase Change Properties of Al
ISSN号	09258388
DOI	10.1016/j.jallcom.2021.161606
英文摘要	With the industrial development, the energy crisis has become a dreadfully serious problem in the world. Therefore, the development of high-durable phase change materials (PCMs) over 600 is very important for the high-temperature heat energy storage system. An improved three-step process of micro-encapsulated PCMs (MEPCMs) was proposed in this work, including boehmite-precipitation-thermal oxidation treatment, which are beneficial to disperse the thermal stress during high-temperature cycling and restrain crack propagation due to forming a dense and durable Al2O3 shell. The cross-section structure, the surface morphology, phase compositions, phase change temperature, thermal durability and cycling stability were simultaneously investigated. In addition, boehmite-precipitation treatment was performed in an aqueous solution with different adding amounts of Al(OH)3. The thickness of the Al2O3 shell layer was adjusted by control of the amount of Al(OH)3. The latent heat of the MEPCMs with the adding amount of 2 g/L Al(OH)3 reached 180 J/g, and the released heat was 110 J/g after 100 cycles of melting-solidification. Furthermore, TEM observation further confirmed the formation of θ-Al2O3 crystal structure on the surface, which is helpful to the durability. Every MEPCM kept a completely spherical shape and a dense surface after 100 cycles of melting-solidification. Therefore, the MEPCMs with excellent heat storage capacity and high thermal stability were widely used to recycle industry, such as waste heat, building energy conservation and aerospace. In addition, the new processing technology can provide excellent and industrial production of PCMs in the future. © 2021 Elsevier B.V.
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	Elsevier Ltd
WOS记录号	WOS:000704768400001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/151084]
专题	材料科学与工程学院省部共建有色金属先进加工与再利用国家重点实验室
作者单位	1.Chongqing Engineering Research Center of New Energy Storage Devices and Applications, Chongqing University of Arts and Sciences, Chongqing; 402160, China; 2.State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 3.School of Mechanical and Electrical Engineering, Nanchang University, Nanchang; 330031, China
推荐引用方式 GB/T 7714	Li, Qinglin,Ma, Xiaodong,Zhang, Xiaoyu,et al. Preparation and properties of Al/Al2O3 core-shell microencapsulated phase change material[J]. Journal of Alloys and Compounds,2021,888.
APA	Li, Qinglin.,Ma, Xiaodong.,Zhang, Xiaoyu.,Ma, Jiqiang.,Liu, Jiaolong.,...&Lan, Yefeng.(2021).Preparation and properties of Al/Al2O3 core-shell microencapsulated phase change material.Journal of Alloys and Compounds,888.
MLA	Li, Qinglin,et al."Preparation and properties of Al/Al2O3 core-shell microencapsulated phase change material".Journal of Alloys and Compounds 888(2021).