TY - JOUR
T1 - Elevated thermal stability of the dielectric properties of CaMoO4–TiO2 composites under temperature variations
AU - Nogueira, Francisco Enilton Alves
AU - do Nascimento, João Paulo Costa
AU - Abreu, Tallison Oliveira
AU - Abreu, Roterdan Fernandes
AU - Ghosh, Anupama
AU - do Carmo, Felipe Felix
AU - da Silva, Marcelo Antonio Santos
AU - da Silva, Ronaldo Santos
AU - Trukhanov, S. V.
AU - Zhou, Di
AU - Singh, C.
AU - Sombra, Antonio Sergio Bezerra
N1 - Publisher Copyright:
© The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2024.
PY - 2024/7
Y1 - 2024/7
N2 - In this article, the dielectric properties of the ceramic CaMoO4 (CMO) with additions of 0, 8, 12, and 20% by mass (wt %) of TiO2 in the radiofrequency (RF) region were studied. X-ray diffraction analysis showed that no secondary phases formed after the addition of TiO2. Scanning electron microscopy was used to analyse the effects on the morphology of the CMO. Complex Impedance Spectroscopy (CIS) was performed to evaluate the electrical properties of the materials, while temperature coefficient of capacitance (TCC) analysis showed that at 10 kHz, CMO12 (CMO with 12 wt % TiO2) presented a TCC equal to zero, demonstrating that this material is thermally stable at this frequency. The activation energy (Ea) was calculated by AC conductivity and imaginary part of the electric modulus (M″) at different temperatures. The Ea values were close, indicating that the thermally activated conduction process is the same. Moreover, the addition of TiO2 resulted in a decrease in the Ea, implying an increased conductivity of the material. The results obtained show that the materials evaluated would be interesting candidates for application in electronic circuits that operate in the radiofrequency region.
AB - In this article, the dielectric properties of the ceramic CaMoO4 (CMO) with additions of 0, 8, 12, and 20% by mass (wt %) of TiO2 in the radiofrequency (RF) region were studied. X-ray diffraction analysis showed that no secondary phases formed after the addition of TiO2. Scanning electron microscopy was used to analyse the effects on the morphology of the CMO. Complex Impedance Spectroscopy (CIS) was performed to evaluate the electrical properties of the materials, while temperature coefficient of capacitance (TCC) analysis showed that at 10 kHz, CMO12 (CMO with 12 wt % TiO2) presented a TCC equal to zero, demonstrating that this material is thermally stable at this frequency. The activation energy (Ea) was calculated by AC conductivity and imaginary part of the electric modulus (M″) at different temperatures. The Ea values were close, indicating that the thermally activated conduction process is the same. Moreover, the addition of TiO2 resulted in a decrease in the Ea, implying an increased conductivity of the material. The results obtained show that the materials evaluated would be interesting candidates for application in electronic circuits that operate in the radiofrequency region.
UR - https://www.scopus.com/pages/publications/85199787888
U2 - 10.1007/s10854-024-13227-7
DO - 10.1007/s10854-024-13227-7
M3 - 文章
AN - SCOPUS:85199787888
SN - 0957-4522
VL - 35
JO - Journal of Materials Science: Materials in Electronics
JF - Journal of Materials Science: Materials in Electronics
IS - 21
M1 - 1470
ER -