TY - JOUR

T1 - Minimization of pyroelectric effects in relaxor-PbTiO3 crystals for piezoelectric sensors

AU - Tang, Yanxue

AU - Shen, Zongyang

AU - Zhang, Shujun

AU - Jiang, Wenhua

AU - Luo, Jun

AU - Shrout, Thomas R.

N1 - Funding Information:
This work is supported by ONR and Science and Technology Commission of Shanghai Municipality (Grant No. 13ZR1430200 ). The author (Y. Tang) would like to thank China Scholarship Council for the financial support of exchange scholar.
Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.

PY - 2014/5/15

Y1 - 2014/5/15

N2 - To minimize pyroelectric effects while keeping high piezoelectric effects in relaxor-PbTiO3 single crystals, the crystallographic orientation dependence of the pyroelectric and piezoelectric coefficients were investigated for binary (1 - x)Pb(Mg1/3Nb2/3)O3-xPbTiO 3 (PMN-PT), ternary (1 - x - y)Pb(In1/2Nb 1/2)O3-yPb(Mg1/3Nb2/3)O 3-xPbTiO3 (PIN-PMN-PT) and Mn-doped PIN-PMN-PT single crystals with the "4R" multidomain state. The secondary pyroelectric coefficients were calculated from the thermodynamic inter-relationship between the piezoelectric, elastic, and thermal expansion coefficients, being on the order of (1.16-1.23) × 10-4 C m-2 K-1 for binary crystals and (0.97-2.03) × 10-4 C m-2 K -1 for ternary ones. The primary pyroelectric coefficients were -(6.73-6.84) × 10-4 C m-2 K-1 and -(5.44-6.43) × 10-4 C m-2 K-1 for binary and ternary crystals, respectively. The pyroelectric coefficients could be reduced by matrix rotation, but at the cost of decreasing longitudinal piezoelectric coefficients d33. Of particular interest is that the maximum piezoelectric coefficients d24â̂ - at θ = ±55o and d34â̂ - at θ = ±35 o by a counterclockwise rotation of θ about the X axis (θ is the rotation angle about the coordinate axes), or d15â̂ - at θ = ±55o, and d35â̂ - at θ = ±35o by a counterclockwise rotation the Y axis, were found on the order of 3000 pC N-1. The corresponding pyroelectric coefficients could be reduced by ∼20%. The reduced pyroelectric coefficients that can contribute to decrease undesirable output signals, together with the high piezoelectric coefficients, enable relaxor-PT crystals as favorable candidates for high-sensitivity piezoelectric sensors.

AB - To minimize pyroelectric effects while keeping high piezoelectric effects in relaxor-PbTiO3 single crystals, the crystallographic orientation dependence of the pyroelectric and piezoelectric coefficients were investigated for binary (1 - x)Pb(Mg1/3Nb2/3)O3-xPbTiO 3 (PMN-PT), ternary (1 - x - y)Pb(In1/2Nb 1/2)O3-yPb(Mg1/3Nb2/3)O 3-xPbTiO3 (PIN-PMN-PT) and Mn-doped PIN-PMN-PT single crystals with the "4R" multidomain state. The secondary pyroelectric coefficients were calculated from the thermodynamic inter-relationship between the piezoelectric, elastic, and thermal expansion coefficients, being on the order of (1.16-1.23) × 10-4 C m-2 K-1 for binary crystals and (0.97-2.03) × 10-4 C m-2 K -1 for ternary ones. The primary pyroelectric coefficients were -(6.73-6.84) × 10-4 C m-2 K-1 and -(5.44-6.43) × 10-4 C m-2 K-1 for binary and ternary crystals, respectively. The pyroelectric coefficients could be reduced by matrix rotation, but at the cost of decreasing longitudinal piezoelectric coefficients d33. Of particular interest is that the maximum piezoelectric coefficients d24â̂ - at θ = ±55o and d34â̂ - at θ = ±35 o by a counterclockwise rotation of θ about the X axis (θ is the rotation angle about the coordinate axes), or d15â̂ - at θ = ±55o, and d35â̂ - at θ = ±35o by a counterclockwise rotation the Y axis, were found on the order of 3000 pC N-1. The corresponding pyroelectric coefficients could be reduced by ∼20%. The reduced pyroelectric coefficients that can contribute to decrease undesirable output signals, together with the high piezoelectric coefficients, enable relaxor-PT crystals as favorable candidates for high-sensitivity piezoelectric sensors.

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U2 - 10.1016/j.matchemphys.2014.01.050

DO - 10.1016/j.matchemphys.2014.01.050

M3 - Article

AN - SCOPUS:84896399646

VL - 145

SP - 135

EP - 140

JO - Materials Chemistry and Physics

JF - Materials Chemistry and Physics

SN - 0254-0584

IS - 1-2

ER -