Improvement of the dielectric properties of Ta2O5 through substitution with Al2O3

R. J. Cava; W. F. Peck; J. J. Krajewski; G. L. Roberts; B. P. Barber; H. M. O'Bryan; P. L. Gammel

doi:10.1063/1.119088

Improvement of the dielectric properties of Ta₂O₅ through substitution with Al₂O₃

R. J. Cava, W. F. Peck, J. J. Krajewski, G. L. Roberts, B. P. Barber, H. M. O'Bryan, P. L. Gammel

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Abstract

For bulk ceramic materials, small substitutions of Al₂O₃ in Ta₂O₅ are shown to cause a moderate enhancement of the dielectric constant. For compositions near 0.95Ta₂O₅-0.05Al₂O₃, the temperature coefficient of the dielectric constant at 20 °C dramatically decreases, from more than 200 ppm/°C for pure Ta₂O₅ to less than 20 ppm/°C. The quality factors (Q) at 1 MHz, are 2000-5000. Measurements to 14 GHz at 20 °C show that the dielectric constant is maintained to microwave frequencies, with a g of ∼600 at 5 GHz.

Original language	English (US)
Pages (from-to)	1396-1398
Number of pages	3
Journal	Applied Physics Letters
Volume	70
Issue number	11
DOIs	https://doi.org/10.1063/1.119088
State	Published - Mar 17 1997
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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title = "Improvement of the dielectric properties of Ta2O5 through substitution with Al2O3",

abstract = "For bulk ceramic materials, small substitutions of Al2O3 in Ta2O5 are shown to cause a moderate enhancement of the dielectric constant. For compositions near 0.95Ta2O5-0.05Al2O3, the temperature coefficient of the dielectric constant at 20 °C dramatically decreases, from more than 200 ppm/°C for pure Ta2O5 to less than 20 ppm/°C. The quality factors (Q) at 1 MHz, are 2000-5000. Measurements to 14 GHz at 20 °C show that the dielectric constant is maintained to microwave frequencies, with a g of ∼600 at 5 GHz.",

author = "Cava, {R. J.} and Peck, {W. F.} and Krajewski, {J. J.} and Roberts, {G. L.} and Barber, {B. P.} and O'Bryan, {H. M.} and Gammel, {P. L.}",

year = "1997",

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T1 - Improvement of the dielectric properties of Ta2O5 through substitution with Al2O3

AU - Cava, R. J.

AU - Peck, W. F.

AU - Krajewski, J. J.

AU - Roberts, G. L.

AU - Barber, B. P.

AU - O'Bryan, H. M.

AU - Gammel, P. L.

PY - 1997/3/17

Y1 - 1997/3/17

N2 - For bulk ceramic materials, small substitutions of Al2O3 in Ta2O5 are shown to cause a moderate enhancement of the dielectric constant. For compositions near 0.95Ta2O5-0.05Al2O3, the temperature coefficient of the dielectric constant at 20 °C dramatically decreases, from more than 200 ppm/°C for pure Ta2O5 to less than 20 ppm/°C. The quality factors (Q) at 1 MHz, are 2000-5000. Measurements to 14 GHz at 20 °C show that the dielectric constant is maintained to microwave frequencies, with a g of ∼600 at 5 GHz.

AB - For bulk ceramic materials, small substitutions of Al2O3 in Ta2O5 are shown to cause a moderate enhancement of the dielectric constant. For compositions near 0.95Ta2O5-0.05Al2O3, the temperature coefficient of the dielectric constant at 20 °C dramatically decreases, from more than 200 ppm/°C for pure Ta2O5 to less than 20 ppm/°C. The quality factors (Q) at 1 MHz, are 2000-5000. Measurements to 14 GHz at 20 °C show that the dielectric constant is maintained to microwave frequencies, with a g of ∼600 at 5 GHz.

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Improvement of the dielectric properties of Ta₂O₅ through substitution with Al₂O₃

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