Effect of sintering temperature on microstructures and microwave dielectric properties of Ba2MgWO6 ceramics

Chen, Yih-Chien; Wang, Yen-Nien; Syu, Ruei-Yang

doi:10.1007/s10854-016-4291-1

Cited by 15 publications

(12 citation statements)

References 11 publications

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“…The higher concentration of europium causes the additional diffraction peaks to appear. ) these phases were also mainly found in other reports [1,7]. Fortunately, the alien phases did not affect the luminescence properties as well as further ceramic preparation.…”

Section: Resultssupporting

confidence: 76%

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Synthesis, Structure, Morphology, and Luminescent Properties of Ba2MgWO6: Eu3+ Double Perovskite Obtained by a Novel Co-Precipitation Method

Bondzior

Miniajluk

et al. 2020

Materials

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Eu3+ doped Ba2MgWO6 (BMW) double-perovskite was successfully synthesized for the first time by the co-precipitation method. The synthesis procedure, crystal structure, as well as morphology of obtained samples are presented. Domination of the 5D0–7F1 magnetic–dipole over forced electric–dipole transitions in the emission spectra indicates that Eu3+ ions are located in the high symmetry site with inversion center. Only one emission line assigned to the 5D0–7F0 transition was observed, confirming that europium substituted for only one host cation site. The photoluminescence excitation (PLE) spectrum is dominated by a strong and broad band related to the O2− → Eu3+ and O2− → W6+ charge transfer. The decay of the emission from the 5D0 and 5D1 levels was investigated. The temperature-dependent emission spectra showed that the T0.5 is equal to 350 K. Extinguishing mechanisms of the Eu3+ luminescence in the studied host are discussed.

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Section: Resultssupporting

confidence: 76%

“…Recently, Ba 2 MgWO 6 (BMW), a perfect cubic crystal structure and very promising representative of double perovskite family, has been put into research in the field of ceramic fabrication by virtue of its excellent dielectric properties [1,2]. However, very few studies have discussed its luminescent properties in detail.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Structure, Morphology, and Luminescent Properties of Ba2MgWO6: Eu3+ Double Perovskite Obtained by a Novel Co-Precipitation Method

Bondzior

Miniajluk

et al. 2020

Materials

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“…In the Ba 2-2x Sr 2x SmSbO 6 system, phase transitions of Fm3m, I 2 /m, and P2 1 /n were observed and the τ f value shifted from +25 to -50 ppm/ [473]. Effect of non ℃ stoichiometry Ba 1+x (MgW) 1/2 O 3 , Ba(Mg 1+y W) 1/2 O 3 , and Ba(MgW 1+z ) 1/2 O 3 and the sintering temperature on microwave dielectric properties was systematically investigated by Wu and Bian [474] and Chen et al [475], respectively. A zero τ f value ceramic was obtained in Ba 2 Mg 1-x Ca x WO 6 system with x = 0.1 [474].…”

Section: A 2 B′b″o 6 Formulamentioning

confidence: 99%

The latest process and challenges of microwave dielectric ceramics based on pseudo phase diagrams

et al. 2021

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The explosive process of 5G communication evokes the urgent demand of miniaturized and integrated dielectric ceramics filter. It is a pressing need to advance the development of dielectric ceramics utilization of emerging technology to design new materials and understand the polarization mechanism. This review provides the summary of the study of microwave dielectric ceramics (MWDCs) sintered higher than 1000 from 2010 up to now, °C with the purpose of taking a broad and historical view of these ceramics and illustrating research directions. To date, researchers endeavor to explain the structure-property relationship of ceramics with multitude of approaches and design a new formula or strategy to obtain excellent microwave dielectric properties. There are variety of factors that impact the permittivity, dielectric loss, and temperature stability of dielectric materials, covering intrinsic and extrinsic factors. Many of these factors are often intertwined, which can complicate new dielectric material discovery and the mechanism investigation. Because of the various ceramics systems, pseudo phase diagram was used to classify the dielectric materials based on the composition. In this review, the ceramics were firstly divided into ternary systems, and then brief description of the experimental probes and complementary theoretical methods that have been used to discern the intrinsic polarization mechanisms and the origin of intrinsic loss was mentioned. Finally, some perspectives on the future outlook for high-temperature MWDCs were offered based on the synthesis method, characterization techniques, and significant theory developments.

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“…Double perovskites materials, i.e., A 2 BB’O 6 , have recently been receiving more and more attention from scientists due to their fascinating physical and chemical properties stemming from their flexible structural modification ability. As a result, double perovskites found a wide range of applications in white light-emitting phosphors [ 1 , 2 ], transparent and translucent ceramics [ 3 , 4 , 5 , 6 ], dielectric materials [ 4 , 7 , 8 ], optical thermometers [ 9 , 10 , 11 ], scintillators [ 12 ], etc. Among them, scintillators are widely used in medical diagnosis, computed tomography, non-destructive inspections, security, nuclear radiation detection, etc.…”

Section: Introductionmentioning

confidence: 99%

“…The first work is dedicated to the synthesis and preparation of BMW ceramics in 2004 [ 3 ], which showed the possibility of obtaining a ceramic from BMW for planar RTD applications. Two other publications were focused on the microstructure [ 5 ] and microwave dielectric characteristics [ 4 ] of BMW ceramics. However, the ceramics in the abovementioned studies were only prepared by traditional heating.…”

Section: Introductionmentioning

confidence: 99%

Effect of Ceramic Formation on the Emission of Eu3+ and Nd3+ Ions in Double Perovskites

et al. 2021

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Herein, the structure, morphology, as well as optical properties of the powder and ceramic samples of Ba2MgWO6 are presented. Powder samples were obtained by high temperature solid-state reaction, while, for the ceramics, the SPS technique under 50-MPa pressure was applied. The morphology of the investigated samples showed some agglomeration and grains with a submicron size of 490–492 µm. The theoretical density and relative density of ceramics were calculated using the Archimedes method. The influence of sample preparation on the position, shape, and character of the host, as well as dopants emission was investigated. Sample sintering enhances regular emission of WO6 groups causing a blue shift of Ba2MgWO6 emission. Nonetheless, under X-ray excitation, only the green emission of inversion WO6 group was detected. For the ceramic doped with Eu3+ ions, the emission of both host and dopant was detected. However, for the powder efficient host to activator energy, the transfer process occurred, and only the magnetic dipole emission of Eu3+ was detected. The intensity of Nd3+ ions of Ba2MgWO6 powder sample is five times higher than for the ceramic. The sintering process reduces inversion defects and creates a highly symmetrical site of neodymium ions. The emission of Ba2MgWO6:Nd3+ consists of transitions from the 4F3/2 excited level to the 4IJ multiplet states with the dominance of the 4F3/2→4I11/2 one. The spectroscopic quality parameter and branching ratio of Nd3+ emission are presented.

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Effect of sintering temperature on microstructures and microwave dielectric properties of Ba2MgWO6 ceramics

Cited by 15 publications

References 11 publications

Synthesis, Structure, Morphology, and Luminescent Properties of Ba2MgWO6: Eu3+ Double Perovskite Obtained by a Novel Co-Precipitation Method

Synthesis, Structure, Morphology, and Luminescent Properties of Ba2MgWO6: Eu3+ Double Perovskite Obtained by a Novel Co-Precipitation Method

The latest process and challenges of microwave dielectric ceramics based on pseudo phase diagrams

Effect of Ceramic Formation on the Emission of Eu3+ and Nd3+ Ions in Double Perovskites

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