长寿命热电池保温材料的研究

Study on thermal insulation used in long-life thermal battery

对用于长寿命热电池的气相SiO_2复合保温材料进行了详细研究。所研制的保温材料在500 ℃,密度为0.265 g/cm3时,导热系数为0.062 9 W/m·k(热线法);测试温度上升曲线的实验表明性能接近美国同类材料Min-K的水平。研究表明,这种材料最主要的影响因素是材料密度和制备工艺。

This paper studied fumed SiO2 complex thermal insulation used in long-life thermal battery. When density of the sample is 0.265 g/cm3, thermal conductivity is 0.062 9 W/m·k at 500 ℃, tested by hot wire method. Temperature rise curves prove that thermal insulation property is close to Min-K in USA. Density and preparation technics are the main factors that affect thermal property.