Comparison of Thermal Conductivity Between Microporous Nano Plate and Fiber Board

The thermal conductivity of microporous wire method at RT to 1000℃ temperature range, and the nano plate and fiber board was measured by non steady hot- results were analyzed and explained by SEM micro morpholo- gy analysis and fluorescence spectrum composition analysis, combined with micro thermal conductivity mechanism.The results show that the thermal conductivity of the nano plate is in the range of 0.03 to 0.1W/（m·K）, and the fiber board is 0.055 to 0.25W/（m-K） ,the thermal conductivity of the two materials both have an upward trend with in- creasing temperature, the difference is that the thermal conductivity of fiber board began to increase sharply after 300℃, while the nano plate started after 550℃ .However, the overall trend of the nano plate was obviously slower than that of the fiber board,and the higher the temperature, the greater the difference.Analysis suggests that the nano-sized particles and internal pores are the key factors that lead to low thermal conductivity of nano plates