High-Q microwave dielectrics in the (Mg1-xZn x)4Ta2O9 ceramics

Cheng-Liang Huang; Chao Hsien Chu; Fan Shuo Liu; Pei Ching Yu

doi:10.1016/j.jallcom.2013.12.172

High-Q microwave dielectrics in the (Mg_1-xZn _x)₄Ta₂O₉ ceramics

Cheng-Liang Huang, Chao Hsien Chu, Fan Shuo Liu, Pei Ching Yu

Department of Electrical Engineering

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

(Mg_1-xZn_x)₄Ta₂O ₉ (x = 0.02-0.08) ceramics were prepared using a solid-state reaction process, and their dielectric properties were characterized at microwave frequency. The formation of solid solutions (Mg_1-xZn _x)₄Ta₂O₉ were confirmed by the X-ray diffraction patterns. Molecular volumes (V_m) and ionic polarizabilities (α_obs) of the specimens were also calculated, which varied linearly from V_m = 323.99 Å, α_obs = 61.321 Å³ for (Mg_0.98Zn_0.02) ₄Ta₂O₉ to V_m = 324.24 Å, α_obs = 61.510 Å³ for (Mg_0.92Zn _0.08)₄Ta₂O₉. The dielectric properties are strongly dependent on the compositions, the densifications and the microstructures of the specimens. The composition (Mg_0.95Zn _0.05)₄Ta₂O₉ has good microwave dielectric properties with an É_r of 12.67, an extremely high Q × f of 385,000 GHz, and a τ_f of -61.9 ppm/ C. Addition of B₂O₃ can lower the sintering temperatures of specimens; whereas it also degrades the Q × f values.

Original language	English
Pages (from-to)	494-499
Number of pages	6
Journal	Journal of Alloys and Compounds
Volume	590
DOIs	https://doi.org/10.1016/j.jallcom.2013.12.172
Publication status	Published - 2014 Mar 25

All Science Journal Classification (ASJC) codes

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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@article{1c97d8c6c3e142c69ee926c9f98a440f,

title = "High-Q microwave dielectrics in the (Mg1-xZn x)4Ta2O9 ceramics",

abstract = "(Mg1-xZnx)4Ta2O 9 (x = 0.02-0.08) ceramics were prepared using a solid-state reaction process, and their dielectric properties were characterized at microwave frequency. The formation of solid solutions (Mg1-xZn x)4Ta2O9 were confirmed by the X-ray diffraction patterns. Molecular volumes (Vm) and ionic polarizabilities (αobs) of the specimens were also calculated, which varied linearly from Vm = 323.99 {\AA}, αobs = 61.321 {\AA}3 for (Mg0.98Zn0.02) 4Ta2O9 to Vm = 324.24 {\AA}, αobs = 61.510 {\AA}3 for (Mg0.92Zn 0.08)4Ta2O9. The dielectric properties are strongly dependent on the compositions, the densifications and the microstructures of the specimens. The composition (Mg0.95Zn 0.05)4Ta2O9 has good microwave dielectric properties with an {\'E}r of 12.67, an extremely high Q × f of 385,000 GHz, and a τf of -61.9 ppm/ C. Addition of B2O3 can lower the sintering temperatures of specimens; whereas it also degrades the Q × f values.",

author = "Cheng-Liang Huang and Chu, {Chao Hsien} and Liu, {Fan Shuo} and Yu, {Pei Ching}",

year = "2014",

month = mar,

day = "25",

doi = "10.1016/j.jallcom.2013.12.172",

language = "English",

volume = "590",

pages = "494--499",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier BV",

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TY - JOUR

T1 - High-Q microwave dielectrics in the (Mg1-xZn x)4Ta2O9 ceramics

AU - Huang, Cheng-Liang

AU - Chu, Chao Hsien

AU - Liu, Fan Shuo

AU - Yu, Pei Ching

PY - 2014/3/25

Y1 - 2014/3/25

N2 - (Mg1-xZnx)4Ta2O 9 (x = 0.02-0.08) ceramics were prepared using a solid-state reaction process, and their dielectric properties were characterized at microwave frequency. The formation of solid solutions (Mg1-xZn x)4Ta2O9 were confirmed by the X-ray diffraction patterns. Molecular volumes (Vm) and ionic polarizabilities (αobs) of the specimens were also calculated, which varied linearly from Vm = 323.99 Å, αobs = 61.321 Å3 for (Mg0.98Zn0.02) 4Ta2O9 to Vm = 324.24 Å, αobs = 61.510 Å3 for (Mg0.92Zn 0.08)4Ta2O9. The dielectric properties are strongly dependent on the compositions, the densifications and the microstructures of the specimens. The composition (Mg0.95Zn 0.05)4Ta2O9 has good microwave dielectric properties with an Ér of 12.67, an extremely high Q × f of 385,000 GHz, and a τf of -61.9 ppm/ C. Addition of B2O3 can lower the sintering temperatures of specimens; whereas it also degrades the Q × f values.

AB - (Mg1-xZnx)4Ta2O 9 (x = 0.02-0.08) ceramics were prepared using a solid-state reaction process, and their dielectric properties were characterized at microwave frequency. The formation of solid solutions (Mg1-xZn x)4Ta2O9 were confirmed by the X-ray diffraction patterns. Molecular volumes (Vm) and ionic polarizabilities (αobs) of the specimens were also calculated, which varied linearly from Vm = 323.99 Å, αobs = 61.321 Å3 for (Mg0.98Zn0.02) 4Ta2O9 to Vm = 324.24 Å, αobs = 61.510 Å3 for (Mg0.92Zn 0.08)4Ta2O9. The dielectric properties are strongly dependent on the compositions, the densifications and the microstructures of the specimens. The composition (Mg0.95Zn 0.05)4Ta2O9 has good microwave dielectric properties with an Ér of 12.67, an extremely high Q × f of 385,000 GHz, and a τf of -61.9 ppm/ C. Addition of B2O3 can lower the sintering temperatures of specimens; whereas it also degrades the Q × f values.

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