The non-isothermal crystallization behavior of pure low-density polyethylene（LDPE） coating and LDPE/n-SiO2 composite coating prepared by flame spraying was investigated by differential scanning calorimetry (DSC)at various cooling rates.The Avrami analysis modified by Jeziorny and Mo models could describe the non-isothermal crystallization process of LDPE and LDPE/n-SiO2 composite coating successfully.The values of Zc and n increased with increasing cooling rate.The values of Zc and n of composite coatings containing nano-SiO2 were higher than those of pure LDPE coating.The half-time values of crystallization showed that the crystallization rate of LDPE/n-SiO2 composite coating was faster than that of pure LDPE coating at a given cooling rate.Furthermore

it was found that nano-SiO2 in LDPE coating acted as an effective nucleation agent.