Microwave Dielectric Properties of Doped BaTi4O9

Subodh G. Mhaisalkar; Dennis W. Readey; Sheikh A. Akbar

doi:10.1111/j.1151-2916.1991.tb07805.x

Microwave Dielectric Properties of Doped BaTi₄O₉

Subodh G. Mhaisalkar^*, Dennis W. Readey, Sheikh A. Akbar

^*Corresponding author for this work

Department of Materials Science and Engineering, The Ohio State University

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

62 Citations (Scopus)

Abstract

Polycrystalline BaTi₄O₉ doped with Mn, Sn, Zr, Ca, Sr, and Pb was prepared from carbonates and oxides. Single‐phase ceramics with densities exceeding 97% of theoretical were made with up to 3 mol% Mn; 6 mol% Sn, Zr, and Ca; and 8 mol% Sr and Pb. Dielectric constant, k, quality factor, Q, and temperature coefficient of frequency, τ_f, of ∼37, 5675, and 15 ppm/°C, respectively, were determined at 4 GHz for undoped BaTi₄O₉. Doping did not significantly affect k and τ_f. However, doping with Mn, Sn, and Pb lowered Q, whereas doping with Zr, Ca, and Sr increased Q by up to 2000. Additions of 0.5 mol% MnO₂ as a second phase improved Q from 3675 to 7600.

Original language	English
Pages (from-to)	1894-1898
Number of pages	5
Journal	Journal of the American Ceramic Society
Volume	74
Issue number	8
DOIs	https://doi.org/10.1111/j.1151-2916.1991.tb07805.x
Publication status	Published - Aug 1991
Externally published	Yes

ASJC Scopus Subject Areas

Ceramics and Composites
Materials Chemistry

Keywords

barium
dielectric materials
doping
microwave
titanates

Access to Document

10.1111/j.1151-2916.1991.tb07805.x

Cite this

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title = "Microwave Dielectric Properties of Doped BaTi4O9",

abstract = "Polycrystalline BaTi4O9 doped with Mn, Sn, Zr, Ca, Sr, and Pb was prepared from carbonates and oxides. Single‐phase ceramics with densities exceeding 97% of theoretical were made with up to 3 mol% Mn; 6 mol% Sn, Zr, and Ca; and 8 mol% Sr and Pb. Dielectric constant, k, quality factor, Q, and temperature coefficient of frequency, τf, of ∼37, 5675, and 15 ppm/°C, respectively, were determined at 4 GHz for undoped BaTi4O9. Doping did not significantly affect k and τf. However, doping with Mn, Sn, and Pb lowered Q, whereas doping with Zr, Ca, and Sr increased Q by up to 2000. Additions of 0.5 mol% MnO2 as a second phase improved Q from 3675 to 7600.",

keywords = "barium, dielectric materials, doping, microwave, titanates",

author = "Mhaisalkar, {Subodh G.} and Readey, {Dennis W.} and Akbar, {Sheikh A.}",

year = "1991",

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T1 - Microwave Dielectric Properties of Doped BaTi4O9

AU - Mhaisalkar, Subodh G.

AU - Readey, Dennis W.

AU - Akbar, Sheikh A.

PY - 1991/8

Y1 - 1991/8

N2 - Polycrystalline BaTi4O9 doped with Mn, Sn, Zr, Ca, Sr, and Pb was prepared from carbonates and oxides. Single‐phase ceramics with densities exceeding 97% of theoretical were made with up to 3 mol% Mn; 6 mol% Sn, Zr, and Ca; and 8 mol% Sr and Pb. Dielectric constant, k, quality factor, Q, and temperature coefficient of frequency, τf, of ∼37, 5675, and 15 ppm/°C, respectively, were determined at 4 GHz for undoped BaTi4O9. Doping did not significantly affect k and τf. However, doping with Mn, Sn, and Pb lowered Q, whereas doping with Zr, Ca, and Sr increased Q by up to 2000. Additions of 0.5 mol% MnO2 as a second phase improved Q from 3675 to 7600.

AB - Polycrystalline BaTi4O9 doped with Mn, Sn, Zr, Ca, Sr, and Pb was prepared from carbonates and oxides. Single‐phase ceramics with densities exceeding 97% of theoretical were made with up to 3 mol% Mn; 6 mol% Sn, Zr, and Ca; and 8 mol% Sr and Pb. Dielectric constant, k, quality factor, Q, and temperature coefficient of frequency, τf, of ∼37, 5675, and 15 ppm/°C, respectively, were determined at 4 GHz for undoped BaTi4O9. Doping did not significantly affect k and τf. However, doping with Mn, Sn, and Pb lowered Q, whereas doping with Zr, Ca, and Sr increased Q by up to 2000. Additions of 0.5 mol% MnO2 as a second phase improved Q from 3675 to 7600.

KW - barium

KW - dielectric materials

KW - doping

KW - microwave

KW - titanates

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