Microwave dielectric properties of barium substituted screen printed CaBi2Nb2O9 ceramic thick films
Source abstract
Abstract
Abstract In the present study, Aurivillius-structured Ba 2+ substituted CaBi 2 Nb 2 O 9 (CBNO) ceramic powder was synthesized by co-precipitation method. The CBNO thick films were delineated by screen printing method on alumina substrates using co-precipitated ceramic powder. The overlay method was adopted to measure the microwave dielectric properties of prepared thick films. Single phase layered perovskite structure of the prepared thick films was confirmed by X-ray Diffraction. The effects of Ba 2+ substitution on the surface morphology, bonding, and microwave dielectric properties of thick films were systematically presented. The maximum value of microwave dielectric constant for the CBNO thick films at 11.8 GHz is 15.6 for Ba 2+ =0.8 substitution. The shift in the stretching vibration modes of the Nb-O bond of NbO 6 octahedron in the Raman spectra with a substitution of Ba 2+ in CBNO was observed. The substitution of Ba 2+ on A-site of CBNO improves the microwave dielectric properties of prepared thick films. This work may provide a new approach to enhance the microwave dielectric performance of Aurivillius-structured ceramic thick films.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Microwave Dielectric Ceramics Synthesis · Ferroelectric and Piezoelectric Materials · Multiferroics and related materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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