粉末绝热（powderinsulation）在冷热表面之间用低导热系数的小颗粒状固体粉末充填后达到绝热的效果。在冷热两表面之间由于经过多个低热导的颗粒，其导热的总热阻为多个颗粒热阻加多个界面热阻之和，辐射传热被多个表面反射降得很低，在室温下的空气，在颗粒度为1mm以下的间隙中对流传热也消失了。这样就形成了一个良好的绝热条件。
本文对加有四方镀铝箔片的真空粉末绝热结构中的传热过程进行了理讨分析和实验研究。
In the paper, the theoretical analyses and experimental researches on heat transfer process in the evacuated powder insulation with squat aluminium-coated flakes additive are carried out.
介绍了空分设备中真空粉末绝热贮槽保温修复技术，并详细叙述了有关的注意事项和要点。
Heat preservation repairing technique for the tank by the vacuum powder heat insulation method in the air separation device is presented, and related notable matters and key points are expounded.
用粉末X射线衍射表征材料的相组成，用扫描电镜(SEM)观测样品形貌，用直接法测量材料的绝热温变。
The samples' structures were characterized by using powder-X-ray diffraction (XRD) and the samples' morphologies were observed with SEM and the adiabatic temperature changes were determined directly.
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