High-Permittivity and Low-Loss Microwave Dielectric Ceramics Based on (x)RE(Zn1/2Ti1/2)O-3-(1-x)CaTiO3 (RE=La and Nd)

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High-Permittivity and Low-Loss Microwave Dielectric Ceramics Based on (x)RE(Zn1/2Ti1/2)O-3-(1-x)CaTiO3 (RE=La and Nd). / Feteira, Antonio; Iddles, D; Price, T; Muir, D; Reaney, IM.

In: Journal of the American Ceramic Society, Vol. 94, No. 3, 01.03.2011, p. 817-821.

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@article{ecae773b2301498f851488dd28b51291,
title = "High-Permittivity and Low-Loss Microwave Dielectric Ceramics Based on (x)RE(Zn1/2Ti1/2)O-3-(1-x)CaTiO3 (RE=La and Nd)",
abstract = "Compositions based on REZn1/2Ti1/2O3-CaTiO3 (RE=La and Nd), suitable for microwave (MW) applications have been developed by systematically doping the perovskite B site with Ta2O5, Al2O3, and MgO in order to tune the temperature coefficient of the resonant frequency (tau(f)) and improve the MW quality factor (Q x f(r)) Optimized compositions, 0.45La(Zn0.395Ti0.385Ta0.01Al0.21)O-3-0.55CaTiO(3) (LZT-CT) and 0.32Nd(Zn0.45Mg0.05Ti0.5)O-3-0.10NdAlO(3)-0.58CaTiO(3) (NZT-CT) were prepared by solid-state reaction and have been characterized. X-ray diffraction (XRD) and scanning electron microscopy revealed that both compositions were single phase with a bulk microstructure composed of equiaxed grains (similar to 10 mu m). Electron diffraction and XRD demonstrated that, at room temperature, LZT-CT and NZT-CT were orthorhombic with space group Pnma, consistent with an a-a-c+ tilt system. Diffraction contrast transmission electron microscopy revealed a complex domain structure consisting of ferroelastic and antiphase domain boundaries. LZT-CT and NZT-CT had zero tau(f), epsilon(r)=49 and 44, Q x f(r)=29 600 GHz (at 1.957 GHz), and 32 200 GHz (at 1.971 GHz), respectively.",
author = "Antonio Feteira and D Iddles and T Price and D Muir and IM Reaney",
year = "2011",
month = mar,
day = "1",
doi = "10.1111/j.1551-2916.2010.04173.x",
language = "English",
volume = "94",
pages = "817--821",
journal = "Journal of the American Ceramic Society",
issn = "0002-7820",
publisher = "Wiley",
number = "3",

}

RIS

TY - JOUR

T1 - High-Permittivity and Low-Loss Microwave Dielectric Ceramics Based on (x)RE(Zn1/2Ti1/2)O-3-(1-x)CaTiO3 (RE=La and Nd)

AU - Feteira, Antonio

AU - Iddles, D

AU - Price, T

AU - Muir, D

AU - Reaney, IM

PY - 2011/3/1

Y1 - 2011/3/1

N2 - Compositions based on REZn1/2Ti1/2O3-CaTiO3 (RE=La and Nd), suitable for microwave (MW) applications have been developed by systematically doping the perovskite B site with Ta2O5, Al2O3, and MgO in order to tune the temperature coefficient of the resonant frequency (tau(f)) and improve the MW quality factor (Q x f(r)) Optimized compositions, 0.45La(Zn0.395Ti0.385Ta0.01Al0.21)O-3-0.55CaTiO(3) (LZT-CT) and 0.32Nd(Zn0.45Mg0.05Ti0.5)O-3-0.10NdAlO(3)-0.58CaTiO(3) (NZT-CT) were prepared by solid-state reaction and have been characterized. X-ray diffraction (XRD) and scanning electron microscopy revealed that both compositions were single phase with a bulk microstructure composed of equiaxed grains (similar to 10 mu m). Electron diffraction and XRD demonstrated that, at room temperature, LZT-CT and NZT-CT were orthorhombic with space group Pnma, consistent with an a-a-c+ tilt system. Diffraction contrast transmission electron microscopy revealed a complex domain structure consisting of ferroelastic and antiphase domain boundaries. LZT-CT and NZT-CT had zero tau(f), epsilon(r)=49 and 44, Q x f(r)=29 600 GHz (at 1.957 GHz), and 32 200 GHz (at 1.971 GHz), respectively.

AB - Compositions based on REZn1/2Ti1/2O3-CaTiO3 (RE=La and Nd), suitable for microwave (MW) applications have been developed by systematically doping the perovskite B site with Ta2O5, Al2O3, and MgO in order to tune the temperature coefficient of the resonant frequency (tau(f)) and improve the MW quality factor (Q x f(r)) Optimized compositions, 0.45La(Zn0.395Ti0.385Ta0.01Al0.21)O-3-0.55CaTiO(3) (LZT-CT) and 0.32Nd(Zn0.45Mg0.05Ti0.5)O-3-0.10NdAlO(3)-0.58CaTiO(3) (NZT-CT) were prepared by solid-state reaction and have been characterized. X-ray diffraction (XRD) and scanning electron microscopy revealed that both compositions were single phase with a bulk microstructure composed of equiaxed grains (similar to 10 mu m). Electron diffraction and XRD demonstrated that, at room temperature, LZT-CT and NZT-CT were orthorhombic with space group Pnma, consistent with an a-a-c+ tilt system. Diffraction contrast transmission electron microscopy revealed a complex domain structure consisting of ferroelastic and antiphase domain boundaries. LZT-CT and NZT-CT had zero tau(f), epsilon(r)=49 and 44, Q x f(r)=29 600 GHz (at 1.957 GHz), and 32 200 GHz (at 1.971 GHz), respectively.

U2 - 10.1111/j.1551-2916.2010.04173.x

DO - 10.1111/j.1551-2916.2010.04173.x

M3 - Article

VL - 94

SP - 817

EP - 821

JO - Journal of the American Ceramic Society

JF - Journal of the American Ceramic Society

SN - 0002-7820

IS - 3

ER -