Structural, electrical, and dielectric properties of Mg۰.۸Ba۰.۲Al۲O۴ ceramicfabricated by gel-combustion route

In this research, the structural, electrical, and dielectric properties of Mg۰.۸Ba۰.۲Al۲O۴nanocrystalline ceramic were investigated. The ceramic was synthesized by gel-combustionmethod. Different techniques such as X-ray diffraction (XRD), Fourier transform infraredspectroscopy (FTIR), scanning electron microscopy–energy dispersive X-ray spectroscopy (SEM–EDX), surface area analyzer (BET), and impedance spectroscopy were used to study the structural,microstructural, morphological, electrical, and dielectric properties of the preparedMg۰.۸Ba۰.۲Al۲O۴ ceramic. In particular, the magnesium aluminate (MgAl۲O۴) has well known forits normal spinel structure. The physical properties of the magnesium aluminate system are moresuitable for microwave device fabrications. The insulating properties of spinel aluminate materialsfavor various applications by way of catalyst, catalyst support and intrinsic dielectric materials,chemical attacks towards the high resistive integrate electronic circuits and also act as a goodrefractory material. The distinct dielectric properties possessed by the magnesium aluminatesystem make it more suitable for microwave and microelectronic devices [۱]. Padmaraj et al.reported a specific surface area of ۱۶۲.۷۰۴ m۲/g for the prepared MgAl۲O۴ nanocrystalline powderin their research.While using a new and affordable sol-gel method, Habibi et al. were able to reporta spinel with a high specific surface area of ۲۶۴ m۲/g at low temperature [۲]. Additionally, thenanocrystalline MgAl۲O۴ pellet was found to have a calculated conductivity value of ۴.۹۲۱۳۱۰-۱۳ S cm-۱[۳].

کلیدواژه ها:

Gel-combustion ، Electrical properties ، Structural properties ، Ceramic