Published May 2019 | Version v1
Journal article Metadata-only

Sintering behavior, microwave dielectric properties of Ca0.66Ti0.66Nd0.34Al0.34O3 ceramics revealed by microstructure and Raman scattering

Creators

  • 1. Key Laboratory of Processing and Testing Technology of Glass & Functional Ceramics of Shandong Province, School of Materials Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan (China)
  • 2. College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016 (China)
  • 3. Advanced Materials Institute, Shandong Provincial Key Laboratory for Special Silicone-Containing Materials, Qilu University of Technology (Shandong Academy of Sciences), Jinan (China)

Description

Ca0.66Ti0.66Nd0.34Al0.34O3(CTNA) ceramics were prepared by solid-state reaction method and their sintering behavior, microwave dielectric properties, and microstructure were investigated. CTNA ceramics were examined by Raman scattering to reveal the correlation of perovskite structure with the microwave properties. It found that the area of peak A1g(O) stretch mode reflects the quality factor Q × f value in the perovskite materials. This concludes that the oxygen octahedron plays an important role of the material's microwave performance. Sintering temperature affected the unit cell volume and the lattice parameters of the CTNA ceramics, the grain size distribution, the Gibbs free energy, the thermal expansion coefficient (CTE), and the dielectric properties (εr, Q×f, τf). The samples sintered at 1500 °C displayed the best dielectric constant and Q×f, as 44.94 and 41922.22 GHz, respectively.

Additional details

Identifiers

DOI
10.1016/j.jallcom.2019.01.167;
PII
S0925838819301756;

Publishing Information

Journal Title
Journal of Alloys and Compounds
Journal Volume
785
Journal Page Range
p. 335-342
ISSN
0925-8388
CODEN
JALCEU

INIS

Country of Publication
Switzerland
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
55047436
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
CERAMICS; DIELECTRIC MATERIALS; DIELECTRIC PROPERTIES; FREE ENTHALPY; GRAIN SIZE; LATTICE PARAMETERS; MICROWAVE RADIATION; OXYGEN; PERFORMANCE; PEROVSKITE; QUALITY FACTOR; RAMAN EFFECT; SINTERING; SOLIDS; THERMAL EXPANSION
Descriptors DEC
DIMENSIONLESS NUMBERS; ELECTRICAL PROPERTIES; ELECTROMAGNETIC RADIATION; ELEMENTS; ENERGY; EXPANSION; FABRICATION; MATERIALS; MICROSTRUCTURE; MINERALS; NONMETALS; OXIDE MINERALS; PEROVSKITES; PHYSICAL PROPERTIES; RADIATIONS; SIZE; THERMODYNAMIC PROPERTIES

Optional Information

Copyright
Copyright (c) 2019 Published by Elsevier B.V.