Effect of pressure of pelletization on dielectric properties of Bismuth Titanate prepared by sol-gel synthesis

• Published in: Advanced powder technology : the international journal of the Society of Powder Technology, Japan Vol. 29; no. 3; pp. 555 - 562
• Main Authors: Badge, Shraddha K., Deshpande, A.V.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-03-2018
• Subjects: Ceramic; Dielectric constant; Dielectric loss; Sol-gel synthesis; XRD; Dielectric loss; Ceramic; Dielectric constant; XRD; Sol-gel synthesis
• ISSN: 0921-8831; 1568-5527
• DOI: 10.1016/j.apt.2017.11.011

[Display omitted]
•Bismuth Titanate synthesis by sol – gel synthesis method.•Pellets with different pressures of pelletization sintered 800 °C for 4 h.•XRD conforms the phase formation of Bismuth Titnate.•Density and dielectric properties enhanced with pressures of pelletization.•Impedance analysis for measurement of RDC and capacitance have been carried out.
Ferroelectric Bismuth Titanate (Bi4Ti3O12) was prepared by sol-gel synthesis method. Bismuth nitrate and titanium isopropoxide were used as the starting precursors in isopropanol. The annealing of precipitate powders was done at 400 °C for 4 h. Effect of pressure of pelletization on the dielectric properties of Bi4Ti3O12 was studied. The pressure was varied from 585 MPa to 1365 MPa during pellet preparation. The orthorhombic structure of Bi4Ti3O12 was obtained after sintering at 800 °C for 4 h, which was confirmed by X-ray diffraction. Dielectric studies have been done in a wide frequency (20 Hz–20 MHz) and temperature (100–400 °C) range.