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High-temperature-phase tellurium barium molybdate crystal as well as preparation method and applications thereof

A technology of barium molybdate tellurium and crystal, which is applied in the field of crystal materials to achieve the effect of simple operation, low price and testing physical properties

Active Publication Date: 2012-05-30
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high-temperature phase barium tellurium molybdate (α-BaTeMo 2 o 9 ) as a new type of birefringent crystal and nonlinear optical crystal, there are no reports on its synthesis, growth, properties and applications at home and abroad.

Method used

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  • High-temperature-phase tellurium barium molybdate crystal as well as preparation method and applications thereof
  • High-temperature-phase tellurium barium molybdate crystal as well as preparation method and applications thereof
  • High-temperature-phase tellurium barium molybdate crystal as well as preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Raw material BaCO 3 , TeO 2 and MoO 3 According to the stoichiometric ratio, synthesize the high-temperature phase barium tellurium molybdate polycrystal, and add it to the flux system TeO 2 -MoO 3 (TeO 2 : MoO 3 = 1.2:1), the molar ratio of the high-temperature phase barium tellurium molybdate polycrystal to the flux is 1:2, mix evenly, put it into a platinum crucible with a volume of Φ60mm×60mm, heat up to 650°C to melt and mix the raw materials Uniform; then put in the seed rod, and cool down to 560°C at a rate of 1.2-1.5°C / h, the growth cycle is 12 days, and a small colorless single crystal is obtained, such as image 3 shown. Structural analysis was carried out on the obtained crystal, and its space group was obtained as Pca2 1 , a=14.8683(2) b=5.66360(10) c=17.6849(3) α=β=γ=90°, and its powder X-ray diffraction pattern (such as figure 1 Shown) is consistent with the theoretical calculation, indicating that the obtained high-temperature barium telluri...

Embodiment 2

[0042] Embodiment 2: raw material BaCO 3 , TeO 2 and MoO 3 According to the stoichiometric ratio, synthesize the high-temperature phase barium tellurium molybdate polycrystal, and add it to the flux system TeO 2 -MoO 3 (TeO 2 : MoO 3 = 1.2: 1), the molar ratio of high-temperature phase barium tellurium molybdate polycrystal and flux is 1: 2, put into the platinum crucible that volume is Φ80mm * 80mm, be heated up to 650 ℃ and make raw material melting and mix homogeneously; Then Cool down to the saturation point of the solution. At this time, put the preheated seed crystal into the solution. The seed crystal is taken from the high-temperature phase barium tellurium molybdate crystal that crystallized spontaneously in Example 1; 1~10s, running for 30~180s, intermittent 5~50s, and cooling down to 540℃ at a rate of 0.01-0.1℃ / h, the growth cycle is 45 days, and a colorless and transparent block single crystal can be obtained, such as Figure 4 shown. The powder X-ray diffra...

Embodiment 3

[0046] Embodiment 3: raw material BaCO 3 , TeO 2 and MoO 3 Weigh at a molar ratio of 1:3.4:4, mix evenly, put it into a platinum crucible with a volume of Φ80mm×80mm, raise the temperature to 650°C to melt the raw materials and mix them evenly; α-BaTeMo 2 o 9 The seed crystal is lowered into the solution, and the crystal rotation parameters are set as follows: speed 5-50rpm, acceleration 1-10s, operation 30-180s, intermittent 5-50s, and cooling at a rate of 0.01-0.1°C / h to 535°C. The growth period is 50 days, and a colorless and transparent bulk single crystal is obtained, such as Figure 5 shown. The powder X-ray diffraction pattern is consistent with the theoretical calculation, indicating that the obtained high-temperature barium tellurium molybdate crystal is orthorhombic.

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Abstract

The invention relates to a high-temperature-phase tellurium barium molybdate crystal as well as a preparation method and the applications thereof. The high-temperature-phase tellurium barium molybdate crystal belongs to an orthorhombic system, a space group is Pca21, a=14.8683 (2), b=5.66360 (10), c=17.6849 (3), ultraviolet-visible-near-infrared light is displayed through a light spectrum, intermediate infrared light is displayed through the light spectrum, the crystal permeates the wavelength range of 380-5530 nm, and infrared laser of 1064 nm is incident into the crystal at a room temperature to generate green light with the wavelength of 532 nm. A fluxing agent method is adopted for growth. The invention also provides the applications of the high-temperature-phase tellurium barium molybdate crystal as a nonlinear optical crystal, a birefringent crystal, a piezoelectric crystal, a ferroelectric crystal, a pyroelectric crystal or a laser substrate material.

Description

technical field [0001] The present invention relates to a novel nonlinear optical crystal and its preparation method and application, specifically including high-temperature phase barium tellurium molybdate (hereinafter referred to as α-BaTeMo 2 o 9 ) crystals, preparation methods and applications, and belong to the technical field of crystal materials. Background technique [0002] Since P.A.Franken et al first discovered the optical second harmonic in 1961, the development of nonlinear optics has been extremely rapid. From the technical field to the research field, the application of nonlinear optics is very extensive. For example: ① Using various nonlinear The crystal is made into an electro-optic switch to realize the modulation of the laser; ②Using the generation of the second and third harmonics, the second and third order optical sum frequency and difference frequency to realize the conversion of the laser frequency, and obtain short-term ultraviolet, vacuum ultravio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/32C30B9/06G02F1/355G02F1/39G02B5/30
Inventor 陶绪堂张俊杰张卫国孙友轩张承乾蒋民华
Owner SHANDONG UNIV
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