Microwave dielectric properties of barium substituted screen printed CaBi2Nb2O9 ceramic thick films. Issue 7 (May 2018)

• Record Type: Journal Article
• Authors: Phadtare, Varsha D.; Parale, Vinayak G.; Kulkarni, Gopal K.; Park, Hyung-Ho; Puri, Vijaya R.
• Is Part Of: Ceramics international. Volume 44:Issue 7(2018)
• Page Start: 7515
• Page End: 7523
• Publication Date: 2018-05
• Subjects: CaBi2Nb2O9 -- Screen printing -- Thick film -- Microwave dielectric properties; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2018.01.150
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: In the present study, Aurivillius-structured Ba 2+ substituted CaBi2 Nb2 O9 (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 NbO6 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.