Domestic substitution process for lithium tantalate (LT) crystals
The Czochralski method has advantages such as fast crystal growth rate, flexible control of crystal growth conditions, and reduced crystal defects, making it the mainstream preparation method for lithium tantalate crystals. Lithium tantalate is a chemical substance that appears as colorless or pale yellow crystals, with the chemical formula LiTaO3. Lithium tantalate crystals, also known as LT crystals, have electro-optic, pyroelectric, and piezoelectric properties. The nonlinear optical properties of lithium tantalate crystals are similar to those of lithium niobate crystals, but they have a higher damage threshold. As a multifunctional crystal, they are widely used in filters, optoelectronics, optical communications, and laser fields. The main preparation methods for lithium tantalate crystals include the Czochralski method, vapor phase transport equilibrium technology, double crucible continuous feeding method, and potassium oxide flux Czochralski method. The Czochralski method...