Study on properties of tantalum-doped La2Ti2O7 ferroelectric ceramics

Chunchun Li; Jibran Khaliq; Huanpo Ning; Xiaoyong Wei; Haixue Yan; Michael Reece

doi:10.1142/S2010135X15500058

Study on properties of tantalum-doped La2Ti2O7 ferroelectric ceramics

Chunchun Li, Jibran Khaliq, Huanpo Ning, Xiaoyong Wei, Haixue Yan, Michael Reece

Mechanical and Construction Engineering Department

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

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Abstract

A series of ceramics with a general formula, La2Ti2-xTaxO7, in which x = 0.05, 0.1, 0.2, and 0.3, were prepared by Spark Plasma Sintering (SPS). Effects of tantalum substitution for titanium on the structure, dielectric, and piezoelectric properties were studied. Results revealed that the structure changed gradually from 4-layer to 3-layer due to the higher valence of Ta. The solid solution limit of tantalum in La2Ti2O7 lattice was in the proximity of x = 0.2. The ferroelectric Curie temperature (Tc) decreased with increasing tantalum doping content. dc resistivity reached a maximum value at x = 0.2 with a value of ∼ 1.0 × 108Ω ⋅ cm at 600°C. The influence of texture on the piezoelectric properties of La2Ti2-xTaxO7 ceramics was also investigated. A maximum d33 value ∼2.1 pC/N was obtained at x = 0.2.

Original language	English
Pages (from-to)	1550005
Journal	Journal of Advanced Dielectrics
Volume	05
Issue number	01
DOIs	https://doi.org/10.1142/S2010135X15500058
Publication status	Published - 31 Mar 2015

Keywords

Piezoelectric ceramics
Curie temperature
piezoelectric coefficient

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title = "Study on properties of tantalum-doped La2Ti2O7 ferroelectric ceramics",

abstract = "A series of ceramics with a general formula, La2Ti2-xTaxO7, in which x = 0.05, 0.1, 0.2, and 0.3, were prepared by Spark Plasma Sintering (SPS). Effects of tantalum substitution for titanium on the structure, dielectric, and piezoelectric properties were studied. Results revealed that the structure changed gradually from 4-layer to 3-layer due to the higher valence of Ta. The solid solution limit of tantalum in La2Ti2O7 lattice was in the proximity of x = 0.2. The ferroelectric Curie temperature (Tc) decreased with increasing tantalum doping content. dc resistivity reached a maximum value at x = 0.2 with a value of ∼ 1.0 × 108Ω ⋅ cm at 600°C. The influence of texture on the piezoelectric properties of La2Ti2-xTaxO7 ceramics was also investigated. A maximum d33 value ∼2.1 pC/N was obtained at x = 0.2.",

keywords = "Piezoelectric ceramics, Curie temperature, piezoelectric coefficient",

author = "Chunchun Li and Jibran Khaliq and Huanpo Ning and Xiaoyong Wei and Haixue Yan and Michael Reece",

year = "2015",

month = mar,

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doi = "10.1142/S2010135X15500058",

language = "English",

volume = "05",

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journal = "Journal of Advanced Dielectrics",

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T1 - Study on properties of tantalum-doped La2Ti2O7 ferroelectric ceramics

AU - Li, Chunchun

AU - Khaliq, Jibran

AU - Ning, Huanpo

AU - Wei, Xiaoyong

AU - Yan, Haixue

AU - Reece, Michael

PY - 2015/3/31

Y1 - 2015/3/31

N2 - A series of ceramics with a general formula, La2Ti2-xTaxO7, in which x = 0.05, 0.1, 0.2, and 0.3, were prepared by Spark Plasma Sintering (SPS). Effects of tantalum substitution for titanium on the structure, dielectric, and piezoelectric properties were studied. Results revealed that the structure changed gradually from 4-layer to 3-layer due to the higher valence of Ta. The solid solution limit of tantalum in La2Ti2O7 lattice was in the proximity of x = 0.2. The ferroelectric Curie temperature (Tc) decreased with increasing tantalum doping content. dc resistivity reached a maximum value at x = 0.2 with a value of ∼ 1.0 × 108Ω ⋅ cm at 600°C. The influence of texture on the piezoelectric properties of La2Ti2-xTaxO7 ceramics was also investigated. A maximum d33 value ∼2.1 pC/N was obtained at x = 0.2.

AB - A series of ceramics with a general formula, La2Ti2-xTaxO7, in which x = 0.05, 0.1, 0.2, and 0.3, were prepared by Spark Plasma Sintering (SPS). Effects of tantalum substitution for titanium on the structure, dielectric, and piezoelectric properties were studied. Results revealed that the structure changed gradually from 4-layer to 3-layer due to the higher valence of Ta. The solid solution limit of tantalum in La2Ti2O7 lattice was in the proximity of x = 0.2. The ferroelectric Curie temperature (Tc) decreased with increasing tantalum doping content. dc resistivity reached a maximum value at x = 0.2 with a value of ∼ 1.0 × 108Ω ⋅ cm at 600°C. The influence of texture on the piezoelectric properties of La2Ti2-xTaxO7 ceramics was also investigated. A maximum d33 value ∼2.1 pC/N was obtained at x = 0.2.

KW - Piezoelectric ceramics

KW - Curie temperature

KW - piezoelectric coefficient

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DO - 10.1142/S2010135X15500058

M3 - Article

SN - 2010-135X

VL - 05

SP - 1550005

JO - Journal of Advanced Dielectrics

JF - Journal of Advanced Dielectrics

IS - 01

ER -

Study on properties of tantalum-doped La2Ti2O7 ferroelectric ceramics

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Keywords

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