Microwave dielectric properties of cold sintered Al2O3-NaCl composite

Alumina-sodium chloride (Al2O3-NaCl) composite (1: 1 ratio in weight percentage (wt%)) is cold sintered at 120 degrees C. The cold sintered composite with a densification of 96% has epsilon(r) and tan delta values 6.53 and 0.007 respectively at 1 MHz. The microwave dielectric properties of Al2O3-NaCl composite at 5 GHz are epsilon(r) = 6.04 and tan delta = 0.002 with tau(epsilon) value +32 ppm/degrees C. The energy saving cold sintering process (CSP) indicates the possibility to integrate with polymers as well as metals for the fabrication of electronic products. (C) 2017 Elsevier B.V. All rights reserved.