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5 results on '"Chikkala Anil Kumar"'

2. Microwave dielectric properties of low temperature fired Ba5Nb4O15- BaWO4ceramics supplemented with their own nanoparticles for LTCC applications

Author

Dobbidi Pamu and Chikkala Anil Kumar

Subjects
010302 applied physics, Marketing, Materials science, Composite number, Sintering, Nanoparticle, 02 engineering and technology, Dielectric, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Microstructure, 01 natural sciences, visual_art, 0103 physical sciences, Materials Chemistry, Ceramics and Composites, visual_art.visual_art_medium, Relative density, Ceramic, Crystallite, Composite material, 0210 nano-technology
Abstract

Polycrystalline Ba5Nb4O15 (BNO) - BaWO4 (BWO) composite ceramics are prepared by adding their own nanoparticles as a sintering aid. The prepared samples exhibited the maximum relative density of 98.2% at 900°C. The complex dielectric response of these composite ceramics are analysed by Havriliak - Negami (HN) equation. The BNO - BWO composite added with x=3 wt% of their nanoparticles, fired at 900oC displayed the best microwave dielectric properties; er=39 and Q×f0=59.8 THz at 9.44 GHz. The obtained results of BNO - BWO composite makes this material as a potential candidate for LTCC applications.

Published
2016
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3. Impedance Spectroscopy, Broadband, and Microwave Dielectric Properties of Mechanically Alloyed Ba5Nb4O15Ceramics

Author

Chikkala Anil Kumar, Dobbidi Pamu, and Sylvester Josephine

Subjects
Imagination, Materials science, Chemical substance, Microwave dielectric properties, media_common.quotation_subject, Nanotechnology, 02 engineering and technology, 01 natural sciences, 0103 physical sciences, Broadband, Materials Chemistry, Ceramic, media_common, 010302 applied physics, Marketing, Thesaurus (information retrieval), business.industry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Dielectric spectroscopy, visual_art, Ceramics and Composites, visual_art.visual_art_medium, Optoelectronics, 0210 nano-technology, Science, technology and society, business
Published
2015
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5. Structural and dielectric properties of (1- x )MgTiO 3 - x Ba 5 Nb 4 O 15 composites by microwave sintering process.

Author

Rabha, Susmita, Chikkala, Anil Kumar, and Dobbidi, Pamu

Subjects
*MAGNESIUM compounds, *COMPOSITE materials, *DIELECTRIC properties, *MICROWAVE sintering, *SOLID state chemistry, *MICROSTRUCTURE, *PERMITTIVITY
Abstract

We report the structural, microwave dielectric properties of (1-x)MgTiO3(MTO) –xBa5Nb4O15(BNO) (wherex= 0.1, 0.2, 0.3 and 0.4 wt.%) prepared by solid state reaction method. The effect of sintering temperature on structural, microstructural and dielectric properties of (1-x)MTO –xBNO forx= 0.1 has been studied systematically. The best dielectric properties were observed for (1-x)MTO –xBNO atx= 0.1, with the dielectric constant (ϵr) ∼20, loss tangent (tanδ) ∼ 10−4, and quality factor (Q × fo) = 60,230 GHz at 8.25 GHz withτf∼ −5 ppm/°C. The obtained properties of this material makes promising for dielectric resonator and antenna applications. [ABSTRACT FROM PUBLISHER]

Published
2017
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