Fluorine-containing zirconium phosphate compound, nonlinear optical crystal thereof, and preparation method and application of nonlinear optical crystal

By preparing a nonlinear optical crystal containing the fluorinated zirconium phosphate compound Zr(H2PO4)(HPO4)F·nH2O, the problems of insufficient transparency and frequency doubling response of deep ultraviolet nonlinear optical crystals were solved, achieving high birefringence and good thermal stability, making it suitable for nonlinear optical devices.

CN122254469APending Publication Date: 2026-06-23FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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Patent Information

Application Number
CN202610389303.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-26
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

Existing deep ultraviolet nonlinear optical crystals struggle to balance deep ultraviolet transparency with nonlinear effects, suffer from insufficient crystal growth and environmental stability, and are prone to introducing absorption edge redshift during frequency doubling or birefringence processes.

Method used

A non-centrosymmetric monoclinic nonlinear optical crystal was prepared by using the fluorinated zirconium phosphate compound Zr(H2PO4)(HPO4)F·nH2O. The crystal formed a two-dimensional infinite layered structure by the coordination polyhedron of [ZrO5F] with the tetrahedrons of [HPO4] and [H2PO4], and combined with the water of crystallization to form a hydrogen bond network. The synthesis was carried out by a hydrothermal reaction method.

Benefits of technology

It achieves deep ultraviolet transparency, large birefringence and strong frequency doubling response, and has good thermal stability, making it suitable for nonlinear optical devices.

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Abstract

The invention discloses a fluorine-containing zirconium phosphate compound, a nonlinear optical crystal of the fluorine-containing zirconium phosphate compound, a preparation method of the nonlinear optical crystal and application of the nonlinear optical crystal. The chemical formula of the fluorine-containing zirconium phosphate compound is Zr (H2PO4) (HPO4) F.nH2O, n is more than or equal to 0 and less than or equal to 3, and n is an integer. According to the nonlinear optical crystal, a [ZrO5F] coordination polyhedron and [HPO4] and [H2PO4] tetrahedrons are connected through shared oxygen atoms to form a two-dimensional infinite layered structure, crystal water molecules are contained between layers, and a hydrogen bond network is formed; the nonlinear optical crystal is a non-centrosymmetric crystal; the nonlinear optical crystal is a monoclinic system; the space group of the nonlinear optical crystal is I2; the unit cell parameters of the nonlinear optical crystal are as follows: a is equal to 10.1200 (5), b is equal to 6.5653 (3), c is equal to 15.6899 (8), beta is equal to 92.340 (5), and unit cell volume V is equal to 1041.58 (9) 3. The nonlinear optical crystal has deep ultraviolet transparency, considerable frequency doubling response and relatively large birefringence, so that the application requirements of nonlinear optical devices are met. In addition, the preparation method has the advantages of simplicity and convenience in operation, low cost, less pollution and low toxicity of the used raw materials.
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