The formulation composition

physicochemical properties and curing process of the epoxy resin/alumina composites system remarkably affect the quality of UHV large-sized basin insulations. Consequently

we employed the non-isothermal differential scanning calorimetry method to study the curing reaction process of epoxy resin/alumina composites containing different curing agent contents. A two-peak curve of DSC would change to a single-peak curve as the content of the curing agent increased. The apparent activation energy（Ea） of pre-stage curing of all samples was essentially unchanged. The Ea of post-stage curing with low curing agent content would decrease significantly as the content of the curing agent increased. The results show that the curing catalytic reaction control dominates in the pre-stage curing process

while the diffusion control and the reaction control have competitive effects in the post-stage curing. The actual curing process accords with the SB（m

n） model

indicating that the autocatalytic reaction plays a leading role in the curing process.