The thermal expansion values of the precoated non silica and have been measured and contrasted with them of the precoated silica sand on the same conditions.
测定了覆膜种砂在激热条件下的膨胀值，并与相同条件下普通覆膜硅砂的膨胀值进行了对比。
2
Silica gel adsorption and thermal desorption were used for the sampling of diethyl ketone and analysis was performed by GC (FID).
硅胶管吸附空气中二乙基甲酮，热解吸后气相色谱(FID)测定。
3
Presently, silica aerogels are the lightest solid material which have the best property in thermal insulation and have the higher porosity, the lower sound velocities in the world.