Low temperature property of Metaphosphatecopper(II/I) salt

Abstract

An inorganically template metaphosphoric acid containing copper salt, nanomaterial, has been synthesized and characterized with different measurement techniques such as Differential Scanning Calorimeter (DSC), UV-Vis-NIR, HRTEM, VSM, PPMS and X-RD. The thermal property of this salt has been studied at a low temperature up to 223 K from 298 K with DSC. The specific heat capacity of this complex has been measured in atmospheric O2 at a rate of 10 K min–1 from 298 K to 223 K and vice versa in two thermal cycles. The net specific heat capacity of this salt is found –88.28 J/gm.K and – 86.56 J/gm.K in first and second thermal cycles, respectively. There is a discontinuity in the specific heat at 106 s while measuring the specific heat capacity of the above nanomaterial at constant temperature 283 K. This particle size of this nanomaterial is ∼ 10 nm. The paramagnetic Curie temperature (θP) and Curie constant (C) are 18.29 K and 1.35x10-3 respectively. This material founds insulator from PPMS and UV-Vis-NIR measurements. So, it can be used as thermal interface material as a composite component with some organic polymers such as paraffin wax, ethylene-vinyl acetate etc.