| 摘要 |
Electric storage heating device with heat resistant wall, made of fibre-free material which has long term heat resistance at at least 250 deg.C. The material is made up of an inorganic expansible material, a heat reflecting filler material and an inorganic binding agent which increases mechanical strength. Pref. the main expansible material is vermiculite, pearlite, chlorite, kaolin, talc or mixtures of these. The filler material is highly dispersed salicic acid with an additive of a turbidity agent such as titanium dioxide. The binder is a wetting agent water glass.
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