Temperature stable cold sintered (Bi0.95Li0.05)(V0.9Mo0.1)O4-Na2Mo2O7 microwave dielectric composites

Dense (Bi0.95Li0.05)(V0.9Mo0.1)O4-Na2Mo2O7 (100−x) wt.% (Bi0.95Li0.05)(V0.9Mo0.1)O4 (BLVMO)-x wt.% Na2Mo2O7 (NMO) composite ceramics were successfully fabricated through cold sintering at 150 °C under at 200 MPa for 30 min. X-ray diffraction, back-scattered scanning electron microscopy, and Raman sp...

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Main Authors:	Dawei Wang, Shiyu Zhang, Di Zhou, Kaixin Song, Antonio Feteira, J. C. Vardaxoglou, William Whittow, Darren Cadman, Ian M. Reaney
Format:	Default Article
Published:	2019
Subjects:	Mechanical engineering not elsewhere classified Cold sintering process Microwave dielectric ceramics Graded radial index lens Mechanical Engineering not elsewhere classified
Online Access:	https://hdl.handle.net/2134/37679
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id	rr-article-9572357
record_format	Figshare
spelling	rr-article-95723572019-04-27T00:00:00Z Temperature stable cold sintered (Bi0.95Li0.05)(V0.9Mo0.1)O4-Na2Mo2O7 microwave dielectric composites Dawei Wang (471687) Shiyu Zhang (1222824) Di Zhou (126052) Kaixin Song (6294419) Antonio Feteira (2070553) J. C. Vardaxoglou (1257960) William Whittow (1224405) Darren Cadman (1250775) Ian M. Reaney (1683007) Mechanical engineering not elsewhere classified Cold sintering process Microwave dielectric ceramics Graded radial index lens Mechanical Engineering not elsewhere classified Dense (Bi0.95Li0.05)(V0.9Mo0.1)O4-Na2Mo2O7 (100−x) wt.% (Bi0.95Li0.05)(V0.9Mo0.1)O4 (BLVMO)-x wt.% Na2Mo2O7 (NMO) composite ceramics were successfully fabricated through cold sintering at 150 °C under at 200 MPa for 30 min. X-ray diffraction, back-scattered scanning electron microscopy, and Raman spectroscopy not only corroborated the coexistence of BLVMO and NMO phases in all samples, but also the absence of parasitic phases and interdiffusion. With increasing NMO concentration, the relative pemittivity (εr) and the Temperature Coefficient of resonant Frequency (TCF) decreased, whereas the Microwave Quality Factor (Qf) increased. Near-zero TCF was measured for BLVMO-20wt.%NMO composites which exhibited εr ~ 40 and Qf ~ 4000 GHz. Finally, a dielectric Graded Radial INdex (GRIN) lens was simulated using the range of εr in the BLVMO-NMO system, which predicted a 70% aperture efficiency at 26 GHz, ideal for 5G applications. 2019-04-27T00:00:00Z Text Journal contribution 2134/37679 https://figshare.com/articles/journal_contribution/Temperature_stable_cold_sintered_Bi0_95Li0_05_V0_9Mo0_1_O4-Na2Mo2O7_microwave_dielectric_composites/9572357 CC BY 4.0
institution	Loughborough University
collection	Figshare
topic	Mechanical engineering not elsewhere classified Cold sintering process Microwave dielectric ceramics Graded radial index lens Mechanical Engineering not elsewhere classified
spellingShingle	Mechanical engineering not elsewhere classified Cold sintering process Microwave dielectric ceramics Graded radial index lens Mechanical Engineering not elsewhere classified Dawei Wang Shiyu Zhang Di Zhou Kaixin Song Antonio Feteira J. C. Vardaxoglou William Whittow Darren Cadman Ian M. Reaney Temperature stable cold sintered (Bi0.95Li0.05)(V0.9Mo0.1)O4-Na2Mo2O7 microwave dielectric composites
description	Dense (Bi0.95Li0.05)(V0.9Mo0.1)O4-Na2Mo2O7 (100−x) wt.% (Bi0.95Li0.05)(V0.9Mo0.1)O4 (BLVMO)-x wt.% Na2Mo2O7 (NMO) composite ceramics were successfully fabricated through cold sintering at 150 °C under at 200 MPa for 30 min. X-ray diffraction, back-scattered scanning electron microscopy, and Raman spectroscopy not only corroborated the coexistence of BLVMO and NMO phases in all samples, but also the absence of parasitic phases and interdiffusion. With increasing NMO concentration, the relative pemittivity (εr) and the Temperature Coefficient of resonant Frequency (TCF) decreased, whereas the Microwave Quality Factor (Qf) increased. Near-zero TCF was measured for BLVMO-20wt.%NMO composites which exhibited εr ~ 40 and Qf ~ 4000 GHz. Finally, a dielectric Graded Radial INdex (GRIN) lens was simulated using the range of εr in the BLVMO-NMO system, which predicted a 70% aperture efficiency at 26 GHz, ideal for 5G applications.
format	Default Article
author	Dawei Wang Shiyu Zhang Di Zhou Kaixin Song Antonio Feteira J. C. Vardaxoglou William Whittow Darren Cadman Ian M. Reaney
author_facet	Dawei Wang Shiyu Zhang Di Zhou Kaixin Song Antonio Feteira J. C. Vardaxoglou William Whittow Darren Cadman Ian M. Reaney
author_sort	Dawei Wang (471687)
title	Temperature stable cold sintered (Bi0.95Li0.05)(V0.9Mo0.1)O4-Na2Mo2O7 microwave dielectric composites
title_short	Temperature stable cold sintered (Bi0.95Li0.05)(V0.9Mo0.1)O4-Na2Mo2O7 microwave dielectric composites
title_full	Temperature stable cold sintered (Bi0.95Li0.05)(V0.9Mo0.1)O4-Na2Mo2O7 microwave dielectric composites
title_fullStr	Temperature stable cold sintered (Bi0.95Li0.05)(V0.9Mo0.1)O4-Na2Mo2O7 microwave dielectric composites
title_full_unstemmed	Temperature stable cold sintered (Bi0.95Li0.05)(V0.9Mo0.1)O4-Na2Mo2O7 microwave dielectric composites
title_sort	temperature stable cold sintered (bi0.95li0.05)(v0.9mo0.1)o4-na2mo2o7 microwave dielectric composites
publishDate	2019
url	https://hdl.handle.net/2134/37679
_version_	1797461450232430592

Temperature stable cold sintered (Bi0.95Li0.05)(V0.9Mo0.1)O4-Na2Mo2O7 microwave dielectric composites

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