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Ferroelectric material dehydrate potassium metagermanate tetraborate, preparation method and application thereof

A technology of potassium tetraboorgermanate dihydrate and electro-optic, which is applied to the growth of polycrystalline materials, chemical instruments and methods, and single crystal growth, can solve the problems of no literature reports, etc., and achieve high yield, simple and repeatable preparation process good sex effect

Inactive Publication Date: 2010-01-06
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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Problems solved by technology

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Embodiment Construction

[0011] 1. Preparation of compounds

[0012] GeO 2 (104mg, 1mmol), K 2 B 4 o 5 (OH) 2 2H 2 O (220mg, 0.810mmol) and pyridine (4.8ml, 60mmol), diethylenetriamine (0.68ml, 6.4mmol), H 2 O (0.78ml, 43mmol) was put into a hydrothermal reaction kettle, mixed evenly, sealed, reacted at 170°C for 7 days, cooled naturally at room temperature, filtered and washed to obtain colorless transparent block crystals.

[0013] 2. Performance test

[0014] We tested the ferroelectric properties of the obtained potassium borogermanate compound. The relationship curve between the polarization intensity P and the applied electric field intensity E of this compound shows that it has obvious ferroelectric effect. It also has second-order nonlinear optical effects.

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Abstract

The invention relates to a frroelectric material dehydrate potassium metagermanate tetraborate, a preparation method and application thereof. The dehydrate potassium metagermanate tetraborate has a chemical formula of K2GeB4O9.2H2O; and the chemical formula belongs a monoclinic system with a space group of Cc, single cell parameters: a is equal to 6.793 (1), b is equal to 12, 0699 (3), c is equal to 11.895 (3)*, alpha and gamma are equal to 90 degrees, beta is equal to 91.156 (4) degrees, V is equal to 975.1(4)*<3>, and Z is equal to 4. The dehydrate potassium metagermanate tetraborate is prepared by a water (agent) hot method. The dehydrate potassium metagermanate tetraborate has frroelectric property and second-order non-linear optical properties, and power SHG coefficient of the dehydrate potassium metagermanate tetraborate is two times of KDP, which corresponds to LBO. The dehydrate potassium metagermanate tetraborate can be used for manufacturing secondary harmonic generators, upper-lower frequency converters, optical parametric oscillators, coders for storing and restoring information, transmitting light information, displaying images and performing holography, and frroelectric light valve arrays for storing the holography.

Description

technical field [0001] The invention relates to a ferroelectric material dihydrate potassium tetraborate germanate compound (molecular formula: K 2 GeB 4 o 9 2H 2 O) preparation and application. Background technique [0002] Ferroelectric material is a multifunctional material with ferroelectric, piezoelectric, pyroelectric and electro-optic properties at the same time. The so-called ferroelectric material refers to a material whose crystal structure has spontaneous polarization when no external electric field is applied, and the direction of its spontaneous polarization can be reversed or reoriented by an external electric field. This property of the material is known as "ferroelectricity" or "ferroelectric effect". In recent years, ferroelectric materials have developed extremely rapidly and have been widely used in electronic technology, laser technology, infrared detection technology, ultrasonic (and microwave acoustics) technology, solid-state memory and display te...

Claims

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Application Information

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IPC IPC(8): C30B29/22C30B7/10C04B35/01
Inventor 杨国昱张洪霞
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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