HEAT STORING MATERIAL

PURPOSE: To obtain a latent heat storing material having an excellent practical ity capable of stably storing and dispersing heat even after repeating of heat cycle for a long period of time, by adding nitric acid or boric acid to sodium acetate trihydrate. CONSTITUTION: A heat storing material comprising sodium acetate as main component and nitric acid or boric acid added thereto. The addition of 2wt% or more nitric acid (specific gravity: 1.38) or 3wt5 or more boric acid to sodium acetate trihydrate completely prevent deposition of sodium acetate anhydride accompanying melting of the material, thus enabling a colorless homogeneous molten liquid of sodium acetate trihydrate to be produced. The melting point and latent heat of fusion decrease substantially in proportion to an increase in an amount of added nitric acid or boric acid. Therefore, the addition of an excessive amount of nitric acid and boric acid should be avoided. It is pre ferred that the amount the acid to be added be 2W3wt% in the case of nitric acid and 3W5wt% in the case of boric acid.COPYRIGHT: (C)1986,JPO&Japio