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Measurement of the Thermophysical Properties of a Thermoplastic Ceramic Paste Across its Solidification Range Using Power-Compensated Differential Scanning Calorimeter

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The specific heat capacity, thermal conductivity, and thermal diffusivity of a thermoplastic ceramic paste were investigated on a power-compensated, differential scanning calorimeter (DSC) using the heat capacity spectral analysis method developed by Merzlyakov and Schick for measuring these parameters on low thermal conductivity solids. The paste features an ultra-fine zinc oxide powder (a number-length mean diameter, D1,0, of 85 nm) as the discrete phase, and a thermoplastic continuous phase comprising a blend of organic waxes with a melting range of ca. 30°–70°C. This paste is formulated with a solids loading of 50 vol% and is currently used in a novel continuous casting process to manufacture pharmaceutical products. The properties of the paste were investigated over a temperature range encompassing the melt and solid states, and for solid loadings from 0 to 70 vol%. The results compare favorably with those obtained using transient line source and transient plane methods.
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Document Type: Research Article

Affiliations: Department of Chemical Engineering, Cambridge, CB2 3RA U.K.

Publication date: November 1, 2005

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