1:2 Cation order in a(Li 1/3(Nb, Ta) 2/3)O 3 microwave perovskites

Albina Borisevich; Peter K. Davies

doi:10.1063/1.1649821

1:2 Cation order in a(Li _1/3(Nb, Ta) _2/3)O ₃ microwave perovskites

Albina Borisevich, Peter K. Davies

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9 Scopus citations

Abstract

The cation order in family of perovskites with stoichiometry A(Li _1/3(Na,Ta) _2/3)O ₃ was investigated. These compounds were sintered to high density at 1350°C having dielectric constant in range 25-30, microwave quality as high as 26000 and negative temperature coefficient of resonant frequency. The cation order in (Ca _2/3La _1/3)(Li _1/3Ta _2/3)O ₃ having 1:1 ordered structure gave no observation of 1:2 polymorph. The comparison of large charge difference between ions involved in microwave perovskites to other 1:2 ordered microwave perovskites reflected higher stability of order which was stable to decomposing/melting temperature.

Original language	English
Pages (from-to)	1347-1349
Number of pages	3
Journal	Applied Physics Letters
Volume	84
Issue number	8
DOIs	https://doi.org/10.1063/1.1649821
State	Published - Feb 23 2004
Externally published	Yes

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N2 - The cation order in family of perovskites with stoichiometry A(Li 1/3(Na,Ta) 2/3)O 3 was investigated. These compounds were sintered to high density at 1350°C having dielectric constant in range 25-30, microwave quality as high as 26000 and negative temperature coefficient of resonant frequency. The cation order in (Ca 2/3La 1/3)(Li 1/3Ta 2/3)O 3 having 1:1 ordered structure gave no observation of 1:2 polymorph. The comparison of large charge difference between ions involved in microwave perovskites to other 1:2 ordered microwave perovskites reflected higher stability of order which was stable to decomposing/melting temperature.

AB - The cation order in family of perovskites with stoichiometry A(Li 1/3(Na,Ta) 2/3)O 3 was investigated. These compounds were sintered to high density at 1350°C having dielectric constant in range 25-30, microwave quality as high as 26000 and negative temperature coefficient of resonant frequency. The cation order in (Ca 2/3La 1/3)(Li 1/3Ta 2/3)O 3 having 1:1 ordered structure gave no observation of 1:2 polymorph. The comparison of large charge difference between ions involved in microwave perovskites to other 1:2 ordered microwave perovskites reflected higher stability of order which was stable to decomposing/melting temperature.

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JO - Applied Physics Letters

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ER -

1:2 Cation order in a(Li _1/3(Nb, Ta) _2/3)O ₃ microwave perovskites

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