Energy efficiency is fundamental in the steel industry. Latent heat storage (LHS) systems with phase change materials (PCM) are attractive technologies for the recovery and utilization of heat, especially for the development of high-temperature thermal energy storage system. This paper describes fabrication of LHS pellets for high-temperature applications using metallic microencapsulated PCM (MEPCM). The LHS pellets consist of Al–Si PCM parts and an Al₂O₃ matrix. The pellets were fabricated by mixing MEPCM with sinterable alumina. The powder mixture was then pelletized and sintered at different pressures and atmospheric conditions, respectively. Some MEPCM in the pellets remained spherical after being sintered at 1000°C, a high-temperature condition above the PCM melting temperature. All fabricated pellets exhibited latent heat of PCM at the melting point of the PCM, about 577°C. The maximum value of latent heat was 73.5 J g⁻¹. This was observed for the LHS pellet pelletized at 20 MPa and sintered under O₂ atmosphere. Therefore, this study presents a great material for high-temperature thermal energy storage systems in the steel industry.

能源效率是钢铁行业的基础。具有相变材料（PCM）的潜热存储（LHS）系统是用于热量回收和利用的有吸引力的技术，特别是对于高温热能存储系统的开发而言。本文介绍了使用金属微囊化PCM（MEPCM）制作用于高温应用的LHS颗粒的方法。LHS球团由Al-Si PCM零件和Al ₂ O _3组成矩阵。通过将MEPCM与可烧结氧化铝混合来制造颗粒。然后将粉末混合物造粒并分别在不同的压力和大气条件下烧结。球团中的一些MEPCM在1000°C（高于PCM熔化温度的高温条件）下烧结后仍保持球形。所有制成的粒料在PCM的熔点约577℃下均表现出PCM的潜热。潜热的最大值为73.5J g ^-1。对于在20 MPa下造粒并在O ₂气氛下烧结的LHS粒料，可以观察到这一点。因此，这项研究为钢铁行业的高温热能存储系统提供了一种很好的材料。