Microwave dielectric properties of Mg3(VO4)2–xBa3(VO4)2 ceramics for LTCC with near zero temperature coefficient of resonant frequency

Ogawa, Hirotaka; Yokoi, Atsushi; Umemura, Ryosuke; Kan, Akinori

doi:10.1016/j.jeurceramsoc.2006.11.031

Cited by 41 publications

(10 citation statements)

References 10 publications

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“…For example, composite materials always possess high mechanical strength, and they are easy in precision machining. Microwave ceramics with near zero temperature coefficient of the resonant frequency (TCF) are thermo stable, [27][28][29] make them suitable in high power and high temperature. Compared with metallic subwavelength unit cells, dielectric materials made unit cells can be used in more different environments.…”

Section: Introductionmentioning

confidence: 99%

All-dielectric metamaterial frequency selective surface

Wang

et al. 2017

J. Adv. Dielect.

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Frequency selective surface (FSS) has been extensively studied due to its potential applications in radomes, antenna reflectors, high-impedance surfaces and absorbers. Recently, a new principle of designing FSS has been proposed and mainly studied in two levels. In the level of materials, dielectric materials instead of metallic patterns are capable of achieving more functional performance in FSS design. Moreover, FSSs made of dielectric materials can be used in different extreme environments, depending on their electrical, thermal or mechanical properties. In the level of design principle, the theory of metamaterial can be used to design FSS in a convenient and concise way. In this review paper, we provide a brief summary about the recent progress in all-dielectric metamaterial frequency selective surface (ADM-FSS). The basic principle of designing ADM-FSS is summarized. As significant tools, Mie theory and dielectric resonator (DR) theory are given which illustrate clearly how they are used in the FSS design. Then, several design cases including dielectric particle-based ADM-FSS and dielectric network-based ADM-FSS are introduced and reviewed. After a discussion of these two types of ADM-FSSs, we reviewed the existing fabrication techniques that are used in building the experiment samples. Finally, issues and challenges regarding the rapid fabrication techniques and further development aspects are discussed.

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Section: Introductionmentioning

confidence: 99%

All-dielectric metamaterial frequency selective surface

Wang

et al. 2017

J. Adv. Dielect.

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“…Moreover, the ceramic substrate should not react with Ag . The LTCC material for microwave applications should also possess good microwave dielectric properties . However, most of the ceramics with good microwave dielectric properties have high sintering temperature.…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of “Quench‐Free Glass” and Ceramic‐Glass Composite for LTCC Applications

et al. 2013

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The 10 mol% ZnO-2 mol% B 2 O 3 -8 mol% P 2 O 5 -80 mol% TeO 2 (ZBPT) glass was prepared by quenching as well as slowly cooling the melt. The ZBPT glass prepared by both methods show similar microwave dielectric properties. ZBPT glass has an e r of 22.5 (at 7 GHz), Q u 3 f of 1500 GHz, and τ f of À100 ppm/°C. The ceramic-glass composites of Sr 2 ZnTeO 6 (SZT) and ZBPT is prepared through two convenient methods: (a) conventional way of co-firing the ceramic with ZBPT glass powder and (b) a nonconventional facile route by co-firing the ceramic with precursor oxide mixture of ZBPT glass at 950°C. In the former route, SZT + 5 wt% ZBPT composite sintered at 950°C showed moderately good microwave dielectric properties (e r = 13.4, Q u 3 f = 4500 GHz and τ f = À52 ppm/°C). Although the SZT + 5 wt% ZBPT composite prepared through the nonconventional method also showed similar microwave dielectric properties (e r = 13.8, Q u 3 f = 5300 GHz and τ f = À50 ppm/°C), the synthesis procedure is much simplified in the latter case. The composites are found to be chemically compatible with Ag. The composite containing 5 wt% ZBPT prepared through conventional and nonconventional ways shows linear coefficients of thermal expansion of 7.0 ppm/°C and 7.1 ppm/°C, respectively. Both the composites have a room-temperature thermal conductivity of 2.1 Wm À1 K À1.

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“…Low melting point oxides and glasses are usually added to lower their sintering temperatures, but often have detrimental effects on the microwave dielectric properties. Currently there is a trend in the field to find ceramics with ultralow firing temperatures (<800°C), which include the following compositions: TeO 2 ‐rich compounds (Bi 2 O 3 –TeO 2 , TiO 2 –TeO 2 , CaO–TeO 2 , BaO–TeO 2 , ZrO 2 –TeO 2 , MgO–TeO 2 , BaO–TiO 2 –TeO 2 ), 16–23 Bi 2 O 3 ‐rich compounds (Bi 2 W 2 O 9 , Bi 12 MO 20 (M=Pb, Mn), BiVO 4 , BiPO 4 , and Bi 2 Mo 2 O 9 ), 5,24–27 V 2 O 5 ‐rich compounds (MgZn 2 (VO 4 ) 2 , Mg 3 (VO 4 ) 2 , Zn 2 V 2 O 7 ), 28–30 MoO 3 ‐rich compounds, 27,31,32 P 2 O 5 ‐rich compounds, 33–35 B 2 O 3 ‐rich compounds, 36–40 etc. However, the application of many of these ceramics are limited due to the chemical incompatibility with the most common electrode metal, silver 5 .…”

Section: Introductionmentioning

confidence: 99%

Microwave Dielectric Properties Trends in a Solid Solution (Bi_1−xLn_x)₂Mo₂O₉ (Ln=La, Nd, 0.0≤x≤0.2) System

Zhou¹,

Randall²,

Wang³

et al. 2009

Journal of the American Ceramic Society

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The influence of La3+ and Nd3+ substitution for the Bi3+ cations in the low‐firing Bi2Mo2O9 system is considered in regard to the sintering behavior, density, phase composition, and microwave dielectric properties. All the compositions can be sintered to high densities in temperature range of 620°–680°C. In (Bi1−xLnx)2Mo2O9 (Ln=La, Nd) ceramics, when x≤0.2 the solid solution is within a monoclinic phase (P21/n) and the phase had an increase in melting temperature with the doping. In the La substitution case, the (Bi0.8La0.2)2Mo2O9 ceramics had the best microwave dielectric properties with a permittivity of 32.7, a Qf value (f=resonant frequency, Q=1/dielectric loss at f) of 13 490 GHz and a temperature coefficient of −4.6 ppm/°C. With the Nd‐substituted samples, the (Bi0.9Nd0.1)2Mo2O9 ceramics had the best microwave dielectric properties with a permittivity of 33.9, a Qf value of 15 200 GHz and a temperature coefficient of +8.05 ppm/°C. The substitution of La and Nd can effectively modify the microwave dielectric properties of Bi2Mo2O9 ceramic and in particular adjust the temperature coefficient to near zero. The (Bi1−xLnx)2Mo2O9 (Ln=La, Nd) ceramics are very interesting new materials for an ultralow‐temperature cofired ceramics technology that is compatible with Al metal electrodes.

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Microwave dielectric properties of Mg3(VO4)2–xBa3(VO4)2 ceramics for LTCC with near zero temperature coefficient of resonant frequency

Cited by 41 publications

References 10 publications

All-dielectric metamaterial frequency selective surface

All-dielectric metamaterial frequency selective surface

Facile Synthesis of “Quench‐Free Glass” and Ceramic‐Glass Composite for LTCC Applications

Microwave Dielectric Properties Trends in a Solid Solution (Bi_1−xLn_x)₂Mo₂O₉ (Ln=La, Nd, 0.0≤x≤0.2) System

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Microwave dielectric properties of Mg3(VO4)2–xBa3(VO4)2 ceramics for LTCC with near zero temperature coefficient of resonant frequency

Cited by 41 publications

References 10 publications

All-dielectric metamaterial frequency selective surface

All-dielectric metamaterial frequency selective surface

Facile Synthesis of “Quench‐Free Glass” and Ceramic‐Glass Composite for LTCC Applications

Microwave Dielectric Properties Trends in a Solid Solution (Bi1−xLnx)2Mo2O9 (Ln=La, Nd, 0.0≤x≤0.2) System

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Product

Resources

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Microwave Dielectric Properties Trends in a Solid Solution (Bi_1−xLn_x)₂Mo₂O₉ (Ln=La, Nd, 0.0≤x≤0.2) System