Domain engineering and full matrix material constants of the [111]c-poled 0.63Pb(Mg1/3Nb2/3)-0.37PbTiO3 single crystal,CrystEngComm

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Domain engineering and full matrix material constants of the [111]c-poled 0.63Pb(Mg1/3Nb2/3)-0.37PbTiO3 single crystal
CrystEngComm ( IF 2.6 ) Pub Date : 2018-07-11 00:00:00 , DOI: 10.1039/c8ce00831k
Zhongyuan Yuan _{1,

2,

3,

4} , Shijing Sang _{1,

2,

3,

4} , Enwei Sun _{1,

2,

3,

4} , Xudong Qi _{1,

2,

3,

4} , Wei-Yi Chang _{5,

6,

7,

8} , Rui Zhang _{1,

2,

3,

4} , Bin Yang _{1,

2,

3,

4} , Xiaoning Jiang _{5,

6,

7,

8} , Wenwu Cao _{1,

2,

3,

4,

9}

Affiliation

Domain engineering was performed on the [111]_c-oriented tetragonal ferroelectric 0.63Pb(Mg_1/3Nb_2/3)-0.37PbTiO₃ (PMN-0.37PT) single crystal in order to achieve better piezoelectric properties. Influences of the poling electric field (E_P), poling temperature, and poling time on piezoelectric and electromechanical properties were investigated. The piezoelectric and dielectric constants increase with increasing the E_P. In addition, the piezoelectric response increases with increasing the poling time but the crystal saturates after 10 min of poling at 30 °C or 20 min at 150 °C under E_P = 2 kV mm⁻¹. The piezoelectric strain coefficient d₃₃ can be improved from 407 pC N⁻¹ poled at 30 °C to 706 pC N⁻¹ after poling at 150 °C near T_C, which is 27.9% higher than the highest value reported before (d₃₃ = 551.9 pC N⁻¹). The enhancement of piezoelectric response results from the domain structure redistribution occurring near the ferroelectric to paraelectric phase transition temperature because the potential barrier is substantially lowered so that polarization switching becomes easier. Therefore, more domain walls appear to be beneficial for the enhancement of the piezoelectric response. Under the optimized poling conditions, a complete set of dielectric, elastic, and piezoelectric constants was measured for [111]_c-poled PMN-0.37PT single crystal using a combined resonance and ultrasonic method (CRUM). Both the longitudinal (d₃₃ = 706 pC N⁻¹) and shear (d₁₅ = 875 pC N⁻¹) piezoelectric properties are outstanding for the [111]_c-poled PMN-0.37PT single crystal due to domain wall motions.

中文翻译：

[111] _c极0.63Pb（Mg _1/3 Nb _2/3）-0.37PbTiO ₃单晶的畴工程和全基质材料常数

为了获得更好的压电性能，对[111] _c取向的四方铁电体0.63Pb（Mg _1/3 Nb _2/3）-0.37PbTiO ₃（PMN-0.37PT）单晶进行了域工程。研究了极化电场（E _P），极化温度和极化时间对压电和机电性能的影响。压电常数和介电常数随E _P的增加而增加。此外，压电响应随极化时间的增加而增加，但在E _P = 2 kV mm ^-1下于30°C极化10分钟或在150°C极化20分钟后，晶体会饱和。压电应变系数d ₃₃可从在30°C极化的407 pC N ^-1提高到在T _C附近在150°C极化后的706 pC N ^-1，比之前报道的最高值高27.9％（d ₃₃ = 551.9 pC N ^-1）。压电响应的增强来自铁电相变至顺电相变温度附近发生的畴结构重新分布，因为势垒大大降低，因此极化切换变得更加容易。因此，更多的畴壁似乎对于增强压电响应是有益的。在优化的极化条件下，使用共振和超声方法（CRUM）测量了[111] _c极化PMN-0.37PT单晶的完整介电常数，弹性常数和压电常数。纵向（d ₃₃ = 706 pC N ^-1）和剪切力（d ₁₅ = 875 pC N ^-1））由于畴壁运动，[111] _c极PMN-0.37PT单晶的压电性能非常好。

更新日期：2018-07-11

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