2-4 inch Lithium Tantalate Ingot boule
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2-4 inch Lithium Tantalate Ingot boule

Lithium tantalate crystal is a colorless and transparent or light yellow crystal material. The crystal integrates various effects such as piezoelectric, electro-optic, acousto-optic, nonlinear optics, etc., and is an excellent sound transmission medium and high-frequency transducer material. It can be widely used in electro-optical devices, laser frequency multipliers, acousto-optical devices, etc.

Usage: surface acoustic wave filter, resonator, Q switch, optical modulator, acousto-optic switch, laser frequency doubling, optical parametric oscillator, optical memory, high temperature and high frequency ultrasonic detector, infrared detector, optical pickup device, etc.
Product Description

Crystal Physical Parameters:

Crystal symmetry

Trigonal, 3m

Lattice constant, A

a = 5.154       c = 13.783

Density, g/cm3


Melting point , °C


Curie point , °C


Mohs hardness


Thermal expansion coefficient, 10-6/ °C

aa = 16   ac = 4

Thermal conductivity , mW/cm °C


Dielectric Constant (@ 100 KHz)

ea = 54    ec = 43

Refractive indices @ 633 nm

no = 2.175   ne = 2.180

Pyroelectric Coefficient:

-2.3 10-4 C/°C/m2


Through the transformation of the rotation and pulling system of the crystal growth equipment, the stability of the crystal growth interface and growth rate is higher, and the influence of crystal rotation and crystal lift disturbance on the melt-solid-liquid interface during the crystal growth process is reduced. The defects generated; the self-created simulated crystal growth system (CSCGS) can design the crystal shape according to the requirements, and the microcomputer chip processes the precise sensor signal according to the crystal growth state to control the crystal shape change. Independently designed a set of temperature fields for the growth of ultra-low gradient flat interface, which makes the grown optical grade crystals of better quality.