Effects of Nd2O3 Doping Levels on the Sintering, Microstructures, and Dielectric Properties of MgO-Al2O3-SiO2 Glass-Ceramics

The effects of Nd2O3 addition on the crystallinities, microstructures, and properties of MgO-Al2O3-SiO2 (MAS) glass-ceramics are investigated. The experimental results show that the addition of Nd2O3 allows complete sintering densification of the MAS at lower temperatures, and appropriate addition ratios increase the crystallinity, promote the formation of Indialite, improve the MAS microstructure, reduce the coefficient of thermal expansion, and optimize the dielectric properties. Ultimately, the best performance is achieved by adding 4 wt% Nd2O3 to the MAS sample and sintering at 1255 degrees C for 15 min. The bulk density is 2.51 g cm(-3), epsilon(r) = 6.50, tan delta = 1.96 x 10(-3) (13 GHz), and CTE = 4.621 ppm degrees C-1.

Automated summary

The effects of Nd2O3 addition on the crystallinities, microstructures, and properties of MgO-Al2O3-SiO2 (MAS) glass-ceramics were studied. It was found that the addition of Nd2O3 allowed for complete sintering of the MAS at lower temperatures. Appropriate addition ratios increased the crystallinity and promoted the formation of Indialite, resulting in improved microstructure, reduced thermal expansion coefficient, and optimized dielectric properties. The best performance was achieved by adding 4 wt% Nd2O3 to the MAS sample and sintering at 1255 degrees C for 15 min, with a bulk density of 2.51 g cm(-3), epsilon(r) = 6.50, tan delta = 1.96 x 10(-3) (13 GHz), and CTE = 4.621 ppm degrees C-1.