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在采用He-22混合工质脉管制冷实验中发现回热材料Er3Ni具有吸收(附)H2的性质,初步估算表明吸氢后形成的氢化物Er3NiHx具有比Er3Ni更大的体积比热容,回热性能更加优越.实验结果表明,He-H2混合工质和Er3NiHx填料的共同作用显著提高了30K温区脉管制冷机的性能.
In the experiment of He-22 mixed refrigerant pulse tube cooling experiment, Er3Ni heat-recovery material was found to have the property of absorbing (attaching) H2. Preliminary calculations show that Er3NiHx, a hydride formed after hydrogen absorption, has larger volume specific heat capacity than Er3Ni, More superior.The experimental results show that the combination of He-H2 and Er3NiHx fillers can significantly improve the performance of pulse tube refrigerator at 30K.