【摘要】 最新研究表明 ,采用陶瓷磁性回热材料GdAlO3 (GAP)可以大大提高4K以下温区脉管制冷机的制冷量和制冷系数 (COP)。在压缩机输入功率约为 4 8kW的条件下 ,采用GAP的二级双向进气型脉管制冷机在 2 8K ,3 1 3K ,3 70K分别获得了 2 0 0mW ,30 0mW和 4 0 0mW制冷量。与采用HoCu2 及ErNi的二级脉管制冷机相比 ,该制冷机在 3 0K附近的制冷量增幅高达 1 50 %。更多还原

【Abstract】 The cooling power and coefficient of performance of a two stage pulse tube cooler below 4 K have been increased greatly by using the newly developed ceramic magnetic regenerative material GdAlO 3(GAP).Cooling powers of 200 mW at 2 8 K,300 mW at 3 13 K,and 400 mW at 3 70 K have been achieved with a compressor input power of about 4 8 kW.The results show that the cooling power near 3 0 K increases by 150% compared with that of the same pulse tube cooler employing only conventional HoCu 2 and ErNi regenerator material.更多还原