Preparation method for VO2 powder with high phase change latent heat

• Main Authors: ZHENG HONGHANG, GU DE'EN, CHEN CONG, ZHAO JIAXUE, LIU RUI, QIN HAOXIN
• Format: Patent
• Language: Chinese; English
• Published: 27.11.2018
• Subjects: ADHESIVES; CHEMISTRY; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; DYES; INORGANIC CHEMISTRY; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; POLISHES

The invention discloses a preparation method for VO2 powder with high phase change latent heat, and belongs to the technical field of energy saving and environmental protection materials. The method adopts a composite annealing process to treat B-phase VO2 powder, firstly conducts annealing in a short-time oxygen atmosphere, and then performs in-situ vacuum annealing to obtain M-phase VO2 powder.The latent heat value of phase change of products obtained by the method is more than 30 J/g, and is more than 35% higher than that of a conventional vacuum annealing process, and the increase of latent heat of phase change has key influence on the intelligent control performance of the M-phase VO2 powder, which is beneficial to absorbing more heat from the environment to regulate the ambient temperature. The composite annealing process has low requirements on equipment, strong compatibility with traditional processes, simple operation and strong controllability, and is expected to be widely used. 种高相变潜热的VO粉体的制备方法。属于节