Fire-protective super thermal insulator is an inorganic material with a nanopore structure and super-low thermal conductivity.It can be classified as either a sol-gel aerogel-based composite or a fumed oxide-based composite.The matrix oxides are investigated from SiO_2 to oxides with higher melting temperatures,including Al_2O_3 or ZrO_2.It was found that the complex component oxides with the appropriate ratios exhibit better thermal stability than single oxide when exposed to fire.The infrared opacifier is...