Investigation of dielectric properties of a Li4Ti5O12 ceramic matrix for microwave temperature sensing applications

da Silva, Marcelo Antonio Santos; Nobrega, Francisco Alekson Chaves; do Carmo, Felipe Felix; do Nascimento, João Paulo Costa; Nogueira, Francisco Enilton Alves; Sales, Antonio Jefferson Mangueira; da Silva, Ronaldo Santos; Trukhanov, Sergei V.; Zhou, Di; Singh, Charanjeet; Sombra, Antonio Sergio Bezerra

doi:10.1007/s41779-024-01009-7

J Aust Ceram Soc

2024

DOI: 10.1007/s41779-024-01009-7

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Investigation of dielectric properties of a Li4Ti5O12 ceramic matrix for microwave temperature sensing applications

Marcelo Antonio Santos da Silva,

Francisco Alekson Chaves Nobrega,

Felipe Felix do Carmo

et al.

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Improved Temperature Sensitivity of the Microwave and Radiofrequency Properties of the Ceramic Matrix Li₂LaNbTiO₇

Gurgel,

Alves Nogueira,

de Freitas

et al. 2024

Physica Status Solidi (a)

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This study presents experimental investigations and numerical simulations of the microwave (MW) dielectric and evaluation of the electrical properties in the radiofrequency region (RF). The ceramic matrix Li2LaNbTiO7 (LLNT) is obtained through the solid‐state reaction method. The synthesis of LLNT is confirmed using the X‐ray diffraction technique. In the complex impedance spectroscopy study, permittivity (ε′r) and loss tangent (tanδ) values are analyzed at room temperature. The study of the conductivity spectrum at different temperatures demonstrates that the conduction process is thermally activated, presenting a value of 0.65 eV for the activation energy. Numerical simulations are employed to evaluate the behavior of the LLNT matrix as dielectric resonator antennas (DRA), whereas this ceramics demonstrated a reflection coefficient of less than −10 dB at the resonant frequency, achieving a gain of 3.71 dBi, a bandwidth of 144 MHz and a radiation efficiency greater than 97%. The results indicate that the LLNT matrix would be a promising candidate for RF and MW operating devices.

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Improved Temperature Sensitivity of the Microwave and Radiofrequency Properties of the Ceramic Matrix Li₂LaNbTiO₇

Gurgel,

Alves Nogueira,

de Freitas

et al. 2024

Physica Status Solidi (a)

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show abstract

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Investigation of dielectric properties of a Li4Ti5O12 ceramic matrix for microwave temperature sensing applications

Cited by 1 publication

References 32 publications

Improved Temperature Sensitivity of the Microwave and Radiofrequency Properties of the Ceramic Matrix Li₂LaNbTiO₇

Improved Temperature Sensitivity of the Microwave and Radiofrequency Properties of the Ceramic Matrix Li₂LaNbTiO₇

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Investigation of dielectric properties of a Li4Ti5O12 ceramic matrix for microwave temperature sensing applications

Cited by 1 publication

References 32 publications

Improved Temperature Sensitivity of the Microwave and Radiofrequency Properties of the Ceramic Matrix Li2LaNbTiO7

Improved Temperature Sensitivity of the Microwave and Radiofrequency Properties of the Ceramic Matrix Li2LaNbTiO7

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Product

Resources

About

Improved Temperature Sensitivity of the Microwave and Radiofrequency Properties of the Ceramic Matrix Li₂LaNbTiO₇

Improved Temperature Sensitivity of the Microwave and Radiofrequency Properties of the Ceramic Matrix Li₂LaNbTiO₇