Frequency independent low-k lithium borate nanocrystalline glass ceramic and glasses for microelectronic applications

• Published in: Journal of materials chemistry. C, Materials for optical and electronic devices Materials for optical and electronic devices, 2016, Vol.4 (15), p.3328-3336
• Main Authors: Arya, S. K., Danewalia, S. S., Singh, K.
• Format: Article
• Language: English
• ISSN: 2050-7526; 2050-7534
• DOI: 10.1039/C5TC03364K

Glasses with composition B 2 O 3 –Li 2 O–ZnO–TiO 2 –V 2 O 5 were prepared with a melt and quench technique with variable concentration of TiO 2 and V 2 O 5 . Structural aspects of the as-prepared sample were explored with the help of electron paramagnetic resonance spectroscopy (EPR). Conductivity and dielectric properties of the glasses and nanocrystalline glass ceramic were investigated using impedance spectroscopy. Vanadium was present in these glasses in the V 4+ state, however, in initial composition, it was in the V 5+ state. The maximum quantity of TiO 2 contained glasses formed a nanocrystalline rutile phase, which dominated the electronic conduction at lower temperatures with decreased activation energy, i.e. 0.21 eV. Moreover, the presence of a nanocrystalline TiO 2 phase reduced the dielectric constant ∼3 at room temperature and 1 MHz with excellent stability over a wide temperature and frequency range. The present nanocrystalline glass ceramic and glasses can be used in fast communication devices.