Journal
CERAMICS INTERNATIONAL
Volume 44, Issue 7, Pages 7515-7523Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2018.01.150
Keywords
CaBi2Nb2O9; Screen printing; Thick film; Microwave dielectric properties
Categories
Funding
- University Grants Commission DAE consortium, Indore, India
- UGC New Delhi, India
- DST-SERB [SERB/F/2139/2016-17]
- 'Korea-Africa Joint Research Programme' grant - Korea government (Ministry of Science, Technology ICT) [2017K1A3A1A09085891]
- National Research Foundation of Korea [2017K1A3A1A09085891] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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In the present study, Aurivillius-structured Ba2+ substituted CaBi2Nb2O9 (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 Ba2+ 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 Ba2+ = 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 Ba2+ in CBNO was observed. The substitution of Ba2+ 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.
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