Abstract
a) SEM micrograph of synthesized zeolithe NaA and b–c) SEM of mixture NaA/Al2O3.
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•The preparation method that can be accurately used to manufacture the mixture of zeolite NaA.•Effect of Al2O3/NaA ratio on optical and structural properties.•Effect of the Zeolite composition on the thermal conductivity, thermal diffusivity, mean free path and the heat conduction mod.
This paper presents a detailed investigation of the correlation between micro-structural, optical and thermal properties of a mixture constituted of NaA zeolite and Al2O3 alumina with different portions at various compacting pressures. A comprehensive study was made by using SEM, EDX, XRD, PL and PTD analysis. Through this full characterization, it was demonstrated that a mixture of grain size ranging from 50 nm to 85 nm can be used as a red emitter of mean wave length λ=650μm in optical devices. This mixture also proved to be used as a thermoinsultor or a thermocondensor material; with a thermal conductivity of about 0.22–1.33 W·m−1·K−1 and a thermal diffusivity of about 0.070–0.174 cm2·s−1.