Characterization of Phase formation and Microstructural Evolution on Dielectric Properties of SrO-B2O3-SiO2 and BaO-SrO-Nb2O5-B2O3-SiO2 glasses

Abstract

The phase formation, microstructural evolution and dielectric properties of SrO-B2O3-SiO2 (SBS) and BaO-SrO-Nb2O5-B2O3-SiO2 (BSNBS) glasses were studied. SBS and BSNBS glasses were prepared via solid state reaction method. The raw materials of SBS and BSNBS were wet mixed for 24 hours and then dried overnight in oven. The mixing powder of SBS and BSNBS were heated until 1250 °C and 1450 °C, respectively for 2 hours for making a glass. The glass frits was crushed to form a fine powder. SBS and BSNBS glass powder was compacted at 250 MPa and then were heat treated at 800 °C and 650 °C, for 3 hours respectively. X-ray diffractometer (XRD) analysis showed the amorphous phase for both glasses powder after melting process, whereas the formation of Ba0.39Sr0.61Nb2O6, SiO2 and Nb2O5 phases, respectively were obtained by BSNBS sample after heat treatment process. Observation on scanning electron microscopy (SEM) micrographs showed no grain was observed for SBS sample while fine grain was seen for BSNBS sample. Both dielectric constant and dielectric loss of BSNBS glass was higher compared to the SBS glass.

Microstructural and Dielectric Responses of Calcium Copper Titanate Added Soda-Lime Glass for High Frequency Devices

“…Glass is known to have low dielectric loss and can improve the densification of ceramic materials [9,11]. Thus, the present study aimed to investigate and determine the desired composition of soda-lime glass addition into CCTO for improving its dielectric response.…”

Wideband frequency tunability of CaCu3Ti4O12‐based dielectric resonator antennas via the addition of glass

“…With regard to this possible glass addition, Liu et al 20 have proven that BaO-SrO-Nb 2 O 5 -B 2 O 3 -SiO 2 (BSNBS) glass can be utilized as a capacitor, even without any additives. Ab Rahman et al 21 also reported that BSNBS glass has higher dielectric constant (ε r = 38) compared to SrO-B 2 O 3 -SiO 2 (SBS) glass (ε r = 6) over the frequency range from 1 MHz until 1 GHz. A preliminary work done by Mohamed et al 22 also proved that with the addition of BSNBS glass into CCTO, the tan δ of CCTO was successfully reduced from 0.54 to 0.38 when measured at 1 MHz.…”