PMN-PT Crystals 

Simple description：

PMN-PT (Lead Magnesium Niobate-Lead Titanate) crystals are relaxor ferroelectric solid solution single crystals with a perovskite structure (ABO3). Their chemical formula is (1-x)Pb(Mg1/3Nb2/3)O3-xPbTiO3, where x represents the molar fraction of lead titanate (PbTiO3) in the solid solution. This type of crystal is generally regarded as a solid solution of lead magnesium niobate [Pb(Mg1/3Nb2/3)O3] and lead titanate.

Detailed Description：

PMN-PT (Lead Magnesium Niobate-Lead Titanate) crystals are relaxor ferroelectric solid solution single crystals with a perovskite structure (ABO3). Their chemical formula is (1-x)Pb(Mg1/3Nb2/3)O3-xPbTiO3, where x represents the molar fraction of lead titanate (PbTiO3) in the solid solution. This type of crystal is generally regarded as a solid solution of lead magnesium niobate [Pb(Mg1/3Nb2/3)O3] and lead titanate.

PMN-PT crystals exhibit excellent piezoelectric properties, electromechanical coupling coefficients, pyroelectric properties, and nonlinear optical properties. Their piezoelectric constant d33 is much higher than that of traditional piezoelectric materials, and their electromechanical coupling coefficient k33 can also reach high levels. In addition, PMN-PT crystals have high dielectric constants and low losses.

Advantages：

1. High Piezoelectric Performance：The piezoelectric constant d33 of PMN-PT crystals is much higher than that of traditional PZT piezoelectric ceramics, with piezoelectric properties about 10 times higher than those of ordinary piezoelectric materials.
2. Large Electromechanical Coupling Coefficient：Its electromechanical coupling coefficient k33 can reach above 0.94, making it excel in energy conversion.
3. High Dielectric Constant：PMN-PT crystals have extremely high dielectric constants, which makes them have potential application value in electronic components such as capacitors.
4. Low Loss：The dielectric loss is 1~3 times lower than that of PZT, which is conducive to improving the efficiency of electronic devices.
5. Excellent Nonlinear Optical Properties：This makes PMN-PT crystals have a wide range of application prospects in the field of nonlinear optical devices.
6. Good Pyroelectric Properties：PMN-PT crystals can produce significant charge changes when the temperature changes, making them have potential application value in pyroelectric detectors and other fields.
7. Wide Range of Applications：PMN-PT crystals can meet application needs and become the core material of a new generation of high-performance piezoelectric transducers, nonlinear optical devices, and photoelectric detection devices (such as infrared detectors).

Application fields：

1. Ultrasonic Transducers：PMN-PT crystals have excellent piezoelectric properties, making them ideal materials for manufacturing high-performance ultrasonic transducers. Ultrasonic transducers are widely used in medical imaging, non-destructive testing, and other fields.
2. Sensors：Due to their high sensitivity and good stability, PMN-PT crystals are often used as core components in sensors to detect changes in physical quantities such as pressure and temperature.
3. Piezoelectric Motors：The piezoelectric effect of PMN-PT crystals allows them to be used in the manufacture of piezoelectric motors. These motors have the advantages of small size, light weight, and fast response speed, making them suitable for micro-mechanical systems requiring precise control.
4. Nonlinear Optical Devices：PMN-PT crystals have excellent nonlinear optical properties and can be used to manufacture various nonlinear optical devices, such as optical switches and optical modulators.
5. Photodetection Devices：PMN-PT crystals also have a wide range of applications in the field of photodetection, such as infrared detectors, which can be used to detect weak optical signals.

Specifications:

Properties		Unit	001 Pooling  Low PT（28%~30%PT） Higher PT（30%~33%PT）
Mechanical properties	Density	(g/cc)	8.1	8.1
	Poisson’s ratio		0.32	0.32
	Elastic constant (S33E)	(10-12m2/N)	40	50
	Elastic constant (S33D)	(10-12m2/N))	8.1	8.1
Piezoelectric properties	d33	(PC/N)	1100~1600	1600~2200
	d31	(PC/N)	-600	-800
	K33	(*K33)	0.85~0.90	0.90~0.95
	Curie temperature	(°C)	>90	>80
Electrical performance	Dielectric constant		3500~5000	4000~6000
	Coercive field	(Kv/cm)	3.0	2.5
	Loss	tanō(%)	<0.5	<0.9