本文提出了一种应用于大功率电子器件散热的相变储热基板,制备了用于相变储热基板的石蜡/膨胀石墨复合相变材料,并通过实验对相变储热基板的储热性能进行验证。结果表明,相变储热基板实验储热量和理论储热量吻合较好,约占热源产生热量的32%,该相变储热基板可以通过延长散热时间,降低基板单位时间散热负荷,同时降低热源和基板的升温速率。 In this paper, a phase-change thermal storage substrate is proposed, which is used to dissipate heat in high-power electronic devices. A paraffin / expanded graphite composite phase change material for phase change thermal storage substrate is prepared. Performance verification. The results show that the experimental heat storage of the phase change thermal storage substrate is in good agreement with the theoretical heat storage capacity, accounting for about 32% of the heat generated by the heat source. The phase change thermal storage substrate can reduce the thermal load per unit time of the substrate by reducing the heat dissipation time, And the substrate heating rate.