Low-temperature sintering and phase component modulation of 0.95MgTiO3–0.05CaTiO3 microwave dielectric ceramics

Xu, Chong‐Yu; Xing, Lina; Wang, Yuan; Li, Zhimin

doi:10.1016/j.ceramint.2023.06.183

Cited by 4 publications

(1 citation statement)

References 40 publications

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“…The relatively high negative TCF value of these compounds can be compensated by inclusion of a positive TCF material in the crystal structure . The commonly used method to compensate for the high negative TCF of magnesium compounds is the addition of CaTiO 3 . − CaTiO 3 has high ε r of 170, low Q × f of 3500 GHz, and very high TCF of +800 ppm/°C. The resultant MgTiO 3 –CaTiO 3 composite has relatively lower Q × f and higher sintering temperature.…”

Section: Introductionmentioning

confidence: 99%

Millimeter Wave Dielectric Resonator Antenna Using High Quality Factor Temperature Stable Dielectric Ceramic Composite K18 for 5G Applications

Shehbaz,

Du,

et al. 2024

ACS Appl. Electron. Mater.

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Driven by the unrelenting perpetual demand of unparalleled network speed and capacity, millimeter wave (mm W) communication stands as an unequivocal pinnacle for 5G technology, compelling the imperative deployment of cutting-edge, highperformance antennas. In the vanguard of antenna innovation, this research introduces a mm W dielectric resonator antenna (DRA) distinguished by its state-of-the-art high quality factor temperature stable composite dielectric ceramic 0.3MgTiO 3 − 0.6Mg 2 TiO 4 −0.1(Ca 0.7 La 0.3 )(Ti 0.7 Al 0.3 )O 3 (MT-CLTA). Astoundingly, MT-CLTA composite ceramic prepared by the solid state reaction method at sintering temperature of 1230 °C showcased remarkable microwave dielectric properties characterized by optimal permittivity (ε r ) ≈ 18.0, high quality factor (Q × f) ≈ 51,700@14.47 GHz, and temperature coefficient of resonant frequency (TCF) ≈ −4.6 ppm/°C. At mm W frequencies, small size of DRA may pose challenges for precise fabrication. Therefore, larger DRA is designed with higher-order TE δ31 radiation mode of rectangular RDRA, excited using an aperture-coupled microstrip line feed structure to increase its electrical size at mm W frequency. RDRA demonstrates excellent radiation performance with a resonance frequency of 27.60, 1.22 GHz impedance bandwidth, measured realized gain of 6.55 dBi, and maximum radiation efficiency of 97%. Embodying virtues of high-quality factor, high gain, and temperature stability, this innovation boldly signals its application potential for 5G mm W communication.

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Section: Introductionmentioning

confidence: 99%

Millimeter Wave Dielectric Resonator Antenna Using High Quality Factor Temperature Stable Dielectric Ceramic Composite K18 for 5G Applications

Shehbaz,

Du,

et al. 2024

ACS Appl. Electron. Mater.

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Sintering behavior of 0.95MgTiO3-0.05CaTiO3 ceramics with high densification, high Q and enhanced mechanical properties for 5G massive MIMO technology: Effect of particle gradation

zhang,

Ren,

Peng

et al. 2024

Ceramics International

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Novel medium‐permittivity Ba_2.92Cu_0.08(Zn_1/3Nb_2/3)₂Ti₂Nb₄O₂₁ microwave dielectric ceramics with high Q × f value and densification for low‐temperature co‐fired ceramics electronic devices

Wu,

Wang,

Jing

et al. 2024

J Am Ceram Soc.

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With the emergence of 5G–6G communication technology, the miniaturization and integration of electronic components are crucial. Ba3Ti4Nb4O21 (BTN) ceramics with hexagonal structures have attracted special attention due to their high dielectric constant, which shows greater application potential in communication base stations and dielectric resonators. However, its high sintering temperature and low‐quality factors also greatly limit the application field. In this paper, boric acid (H3BO3) as a dopant, was used to investigate the influence on the structure, microstructure, Raman spectrum, and microwave properties for Ba2.92Cu0.08(Zn1/3Nb2/3)2Ti2Nb4O21 (BCZTN)‐xHB (0.25≤x≤1.25 wt%) ceramics. The results reflected that H3BO3 was an effective additive, which could promote ceramic densification, accelerate grain growth and uniform distribution, and enhance its microwave performance. Among them, high densification was 93.92 ± 0.35%, and the Q × f value ∼16981 ± 340 GHz at x = 0.75, was more than 2∼3 times higher than other BTN‐based ceramics. Superior microwave dielectric properties were achieved for 0.75 wt% H3BO3‐doped BCZTN ceramic sintered at 900°C: εr∼42.35 ± 0.48, Q×f∼16981 ± 340 GHz, and τf∼40.02 ± 1.43 ppm/°C. More encouragingly, BCZTN‐0.75HB ceramic did not chemically react with Ag, which suggested that it had the potential to be a candidate material for low‐temperature co‐fired ceramics base station communication devices.

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Low-temperature sintering and phase component modulation of 0.95MgTiO3–0.05CaTiO3 microwave dielectric ceramics

Cited by 4 publications

References 40 publications

Millimeter Wave Dielectric Resonator Antenna Using High Quality Factor Temperature Stable Dielectric Ceramic Composite K18 for 5G Applications

Millimeter Wave Dielectric Resonator Antenna Using High Quality Factor Temperature Stable Dielectric Ceramic Composite K18 for 5G Applications

Sintering behavior of 0.95MgTiO3-0.05CaTiO3 ceramics with high densification, high Q and enhanced mechanical properties for 5G massive MIMO technology: Effect of particle gradation

Novel medium‐permittivity Ba_2.92Cu_0.08(Zn_1/3Nb_2/3)₂Ti₂Nb₄O₂₁ microwave dielectric ceramics with high Q × f value and densification for low‐temperature co‐fired ceramics electronic devices

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Low-temperature sintering and phase component modulation of 0.95MgTiO3–0.05CaTiO3 microwave dielectric ceramics

Cited by 4 publications

References 40 publications

Millimeter Wave Dielectric Resonator Antenna Using High Quality Factor Temperature Stable Dielectric Ceramic Composite K18 for 5G Applications

Millimeter Wave Dielectric Resonator Antenna Using High Quality Factor Temperature Stable Dielectric Ceramic Composite K18 for 5G Applications

Sintering behavior of 0.95MgTiO3-0.05CaTiO3 ceramics with high densification, high Q and enhanced mechanical properties for 5G massive MIMO technology: Effect of particle gradation

Novel medium‐permittivity Ba2.92Cu0.08(Zn1/3Nb2/3)2Ti2Nb4O21 microwave dielectric ceramics with high Q × f value and densification for low‐temperature co‐fired ceramics electronic devices

Contact Info

Product

Resources

About

Novel medium‐permittivity Ba_2.92Cu_0.08(Zn_1/3Nb_2/3)₂Ti₂Nb₄O₂₁ microwave dielectric ceramics with high Q × f value and densification for low‐temperature co‐fired ceramics electronic devices