Microwave dielectric properties of La3Ti2TaO11 ceramics with perovskite-like layered structure

Li, Chunchun; Wei, Xiaoyong; Yan, Haixue; Reece, Michael J.

doi:10.1016/j.jeurceramsoc.2012.06.002

Cited by 21 publications

(7 citation statements)

References 15 publications

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“…The enhancement in Qxf value with increasing sintering temperature may be attributed to the increase in relative density and the degree of orientation. Similar phenomenon was previous reported in other textured ceramic materials [22,23]. The deterioration of Qxf value can be attributed to the low densification combined with abnormal grain growth, although it exhibited high orientation degree as illustrated in Fig.…”

Section: Methodssupporting

confidence: 88%

Microwave dielectric properties of CaV2O6 ceramics with low dielectric loss

Yao

Chen

et al. 2015

J Mater Sci: Mater Electron

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Novel glass-free low temperature firing microwave dielectric ceramics CaV 2 O 6 with high Q was prepared through a conventional solid-state reaction method. The crystal phase and microstructures were studied by XRD and SEM. Orientation degree of CaV 2 O 6 ceramics increased with an increase of sintering temperature. The Qxf values of CaV 2 O 6 ceramics were strongly correlated with the densification and orientation degree. Typically, the CaV 2 O 6 ceramics sintered at 675°C possessed excellent microwave dielectric properties: e r = 10.2, Qxf = 123,000 GHz (at 10.2 GHz) and s f = -60 ppm/°C.

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Section: Methodssupporting

confidence: 88%

Microwave dielectric properties of CaV2O6 ceramics with low dielectric loss

Yao

Chen

et al. 2015

J Mater Sci: Mater Electron

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“…There are Al(Si)O 4 tetrahedron, Al(Mg)O 6 octahedron and YO 8 dodecahedra in Y 3 MgAl 3 SiO 12 crystal structures. It well‐known that the orientation and the degree of order of octahedron in perovskite ceramics have critical impact on τ f value . However, how the polyhedrons in Y 3 MgAl 3 SiO 12 ceramics affect the temperature coefficient of resonant frequency is further studied in the future.…”

Section: Resultsmentioning

confidence: 99%

“…It well-known that the orientation and the degree of order of octahedron in perovskite ceramics have critical impact on s f value. 24,25 However, how the polyhedrons in Y 3 MgAl 3 SiO 12 ceramics affect the temperature coefficient of resonant frequency is further studied in the future. Meanwhile, the s f is also necessary to be modified to near zero to meet the requirements of commercial application.…”

Section: Resultsmentioning

confidence: 99%

Ionic occupation, structures, and microwave dielectric properties of Y₃MgAl₃SiO₁₂ garnet‐type ceramics

Song

Wei

et al. 2017

J Am Ceram Soc

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The Y 3 MgAl 3 SiO 12 ceramics with pure phase were successfully synthesized by solid-state sintering reaction method for the first time. Their microwave dielectric properties were investigated as a function of sintering temperature. Their microstructure characteristics and ionic occupation sites of tetrahedral and octahedral units were characterized and analyzed by SEM& energy dispersive spectrometer (EDS) and Rietveld refinement of X-ray powder diffraction data. Crystal 1,2 Up to now, many materials with high quality factor (Qf values) to depress energy loss, low dielectric constant (e r ) to reduce the delay time of electronic signal transmission, and ideal near zero temperature coefficient of resonant frequency (s f ) for working frequency stability have been reported and used as resonators, filters, dielectric antennas, dielectric guided wave circuits, and other microwave components. To solve these problems, various kinds of silicate ceramic materials, such as forsterite Mg 2 SiO 4, 5 willemite

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“…Consequently, the tolerance factor was calculated by the following equation [21] and the data were in Table 1: (2) With increasing substitution content, tolerance factor inferred a decreasing temperature coefficient of resonant frequency. For 0.15 ≤ x ≤ 0.2, the reason for the drop of microwave dielectric properties was probably due to the secondary phase, with ε r = 33.6, Q × f = 1300 GHz and τ f = -103 ppm/°C [14]. 2) system have been investigated in the study.…”

Section: Resultsmentioning

confidence: 99%

PHASE EVOLUTION AND MICROWAVE DIELECTRIC PROPERTIES OF Ca0.61Nd0.26Ti1-x (Al1/2Nb1/2)xO₃ CERAMICS (0 ≤ x ≤ 0.2)

Chen¹

2016

Ceramics - Silikaty

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Microwave dielectric properties of La3Ti2TaO11 ceramics with perovskite-like layered structure

Cited by 21 publications

References 15 publications

Microwave dielectric properties of CaV2O6 ceramics with low dielectric loss

Microwave dielectric properties of CaV2O6 ceramics with low dielectric loss

Ionic occupation, structures, and microwave dielectric properties of Y₃MgAl₃SiO₁₂ garnet‐type ceramics

PHASE EVOLUTION AND MICROWAVE DIELECTRIC PROPERTIES OF Ca0.61Nd0.26Ti1-x (Al1/2Nb1/2)xO₃ CERAMICS (0 ≤ x ≤ 0.2)

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Microwave dielectric properties of La3Ti2TaO11 ceramics with perovskite-like layered structure

Cited by 21 publications

References 15 publications

Microwave dielectric properties of CaV2O6 ceramics with low dielectric loss

Microwave dielectric properties of CaV2O6 ceramics with low dielectric loss

Ionic occupation, structures, and microwave dielectric properties of Y3MgAl3SiO12 garnet‐type ceramics

PHASE EVOLUTION AND MICROWAVE DIELECTRIC PROPERTIES OF Ca0.61Nd0.26Ti1-x (Al1/2Nb1/2)xO₃ CERAMICS (0 ≤ x ≤ 0.2)

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Ionic occupation, structures, and microwave dielectric properties of Y₃MgAl₃SiO₁₂ garnet‐type ceramics