(Bi1-x-yLnxCey)3TeBO9 compound, (Bi1-x-yLnxCey)3TeBO9 nonlinear optical crystal, (Bi1-x-yLnxCey)3TeBO9 scintillation crystal, preparation method and application thereof

Abstract

The invention discloses a (Bi1-x-yLnxCey)3TeBO9 compound, (Bi1-x-yLnxCey)3TeBO9 nonlinear optical crystal, (Bi1-x-yLnxCey)3TeBO9 scintillation crystal, a preparation method and an application thereof. The compound crystal with its chemical formula being Bi3TeBO9 is a non-centrosymmetrical structure and belongs to the hexagonal system, and space group is P63. The invention also discloses (Bi1-x-yLnxCey)3TeBO9 compound crystal doped with different rare earth elements, wherein Ln=La-Lu or Y; X is less than 1 and greater than or equal to 0; and Y=0 or Y is less than or equal to 0.2 and greater than or equal to 0.0001. By a flux method, high-quality and large-sized (Bi1-x-yLnxCey)3TeBO9 crystal can grow, has good mechanical property is good, is deliquescence-free, and can be used for manufacturing nonlinear optical devices. A laser manufactured by the use of the crystal can be used in fields of spectroscopy, biomedicine, military and the like. The material of the invention also can be used as high-density fast-attenuation scintillation crystal.

Description

technical field

[0001] The present invention relates to the field of artificial lenses. More specifically, it relates to a bismuth telluride borate compound, a bismuth telluride borate nonlinear optical crystal, a bismuth telluride borate scintillation crystal and its preparation method and application. Background technique

[0002] With the development of laser technology, lasers with different wavelengths are in great demand in different fields of national economy and people's livelihood, such as national defense, medical treatment, communication, lithography and laser processing. Frequency doubling is a method often used in laser technology to change the output wavelength of laser beams. It usually uses a special nonlinear optical crystal placed in front of the laser beam to change the output wavelength of the laser beam. At present, the commonly used nonlinear optical crystal materials mainly include KDP (KH 2 PO 4 ), KTP (KTiOPO 4 ), BBO (β-BaB 2 o 4 ) and LBO (L...

Examples

Embodiment 1

[0043] Embodiment 1 prepares polycrystalline Bi 3 TeBO 9 compound

[0044] Prepared by solid phase reaction method, the reaction equation is 3Bi 2 o 3 +2TeO 2 +2H 3 BO 3 =2Bi 3 TeBO 9 ; The proportioning of above-mentioned three kinds of reagents: Bi 2 o 3 (13.977g, 0.03mol), TeO 2 (3.192g, 0.02mol), H 3 BO 3 (1.237g, 0.02mol); Its specific preparation steps are: take reagent respectively by above-mentioned dosage, put them in mortar, grind and mix, then pack in platinum crucible, put into muffle furnace, with 50 The rate of ℃ / h is raised to 500 ℃ for pre-calcination, and then cooled for 24 hours. After cooling, the sample is taken out and re-ground and mixed, and then placed in a muffle furnace for sintering at 700 ℃ for 48 hours to obtain polycrystalline Bi. 3 TeBO 9 Compound, Bi 3 TeBO 9 The XRD pattern of the compound is as figure 2 shown.

Embodiment 2

[0045] Embodiment 2 adopts flux method to prepare Bi 3 TeBO 9 nonlinear optical crystal

[0046] Use TeO 2 As a flux, the molar ratio of solute to flux is 1:0.5. Weigh 279.54gBi respectively 2 o 3 (0.6mol), 24.74gH 3 BO 3 (0.4mol) and 47.88gTeO 2 (0.3mol), after grinding and mixing in a mortar, melt it in batches and put it into a Φ60mm×60mm crucible; put the crucible after the material into a vertical crystal growth furnace, raise the temperature to 800°C, and stir at a constant temperature After 48h, then lower the temperature to 5°C above the saturation point, introduce the seed crystal to cool down at a rate of 1°C / day, and start crystal growth at a rotation speed of 15r / min. After the crystal growth is completed, lift the seed rod to lift the crystal out of the liquid surface, and then cooled down to room temperature at a rate of 30°C / h to obtain transparent Bi 3 TeBO 9 Nonlinear Optical Crystals.

Embodiment 3

[0047] Example 3 Preparation of Bi by Flux Top Seed Method 3 TeBO 9 nonlinear optical crystal

[0048] Use TeO 2 -B 2 o 3 As a flux, the molar ratio of solute to flux is 1:1:0.5. Weigh 559.08gBi respectively 2 o 3 (1.2mol), 98.93gH 3 BO 3 (1.6mol) and 255.36gTeO 2 (1.6mol), after grinding and mixing in a mortar, melt it in batches and put it into a Φ70mm×70mm crucible; put the crucible after the material into a vertical crystal growth furnace, raise the temperature to 750°C, and stir at a constant temperature After 48 hours, the temperature was lowered to 10°C above the saturation point, and the seed crystal was introduced so that the seed crystal was just in contact with the liquid surface, and then the temperature was lowered at a rate of 0.5°C / day, and the rotation speed was 25r / min to start crystal growth. After the crystal growth was completed, , the crystal was lifted from the liquid surface, and then cooled to room temperature at a rate of 20°C / h to obtain a t...

technical field

[0001] The present invention relates to the field of artificial lenses. More specifically, it relates to a bismuth telluride borate compound, a bismuth telluride borate nonlinear optical crystal, a bismuth telluride borate scintillation crystal and its preparation method and application. Background technique

[0002] With the development of laser technology, lasers with different wavelengths are in great demand in different fields of national economy and people's livelihood, such as national defense, medical treatment, communication, lithography and laser processing. Frequency doubling is a method often used in laser technology to change the output wavelength of laser beams. It usually uses a special nonlinear optical crystal placed in front of the laser beam to change the output wavelength of the laser beam. At present, the commonly used nonlinear optical crystal materials mainly include KDP (KH 2 PO 4 ), KTP (KTiOPO 4 ), BBO (β-BaB 2 o 4 ) and LBO (L...

Examples

Embodiment 1

[0043] Embodiment 1 prepares polycrystalline Bi 3 TeBO 9 compound

[0044] Prepared by solid phase reaction method, the reaction equation is 3Bi 2 o 3 +2TeO 2 +2H 3 BO 3 =2Bi 3 TeBO 9 ; The proportioning of above-mentioned three kinds of reagents: Bi 2 o 3 (13.977g, 0.03mol), TeO 2 (3.192g, 0.02mol), H 3 BO 3 (1.237g, 0.02mol); Its specific preparation steps are: take reagent respectively by above-mentioned dosage, put them in mortar, grind and mix, then pack in platinum crucible, put into muffle furnace, with 50 The rate of ℃ / h is raised to 500 ℃ for pre-calcination, and then cooled for 24 hours. After cooling, the sample is taken out and re-ground and mixed, and then placed in a muffle furnace for sintering at 700 ℃ for 48 hours to obtain polycrystalline Bi. 3 TeBO 9 Compound, Bi 3 TeBO 9 The XRD pattern of the compound is as figure 2 shown.

Embodiment 2

[0045] Embodiment 2 adopts flux method to prepare Bi 3 TeBO 9 nonlinear optical crystal

[0046] Use TeO 2 As a flux, the molar ratio of solute to flux is 1:0.5. Weigh 279.54gBi respectively 2 o 3 (0.6mol), 24.74gH 3 BO 3 (0.4mol) and 47.88gTeO 2 (0.3mol), after grinding and mixing in a mortar, melt it in batches and put it into a Φ60mm×60mm crucible; put the crucible after the material into a vertical crystal growth furnace, raise the temperature to 800°C, and stir at a constant temperature After 48h, then lower the temperature to 5°C above the saturation point, introduce the seed crystal to cool down at a rate of 1°C / day, and start crystal growth at a rotation speed of 15r / min. After the crystal growth is completed, lift the seed rod to lift the crystal out of the liquid surface, and then cooled down to room temperature at a rate of 30°C / h to obtain transparent Bi 3 TeBO 9 Nonlinear Optical Crystals.

Embodiment 3

[0047] Example 3 Preparation of Bi by Flux Top Seed Method 3 TeBO 9 nonlinear optical crystal

[0048] Use TeO 2 -B 2 o 3 As a flux, the molar ratio of solute to flux is 1:1:0.5. Weigh 559.08gBi respectively 2 o 3 (1.2mol), 98.93gH 3 BO 3 (1.6mol) and 255.36gTeO 2 (1.6mol), after grinding and mixing in a mortar, melt it in batches and put it into a Φ70mm×70mm crucible; put the crucible after the material into a vertical crystal growth furnace, raise the temperature to 750°C, and stir at a constant temperature After 48 hours, the temperature was lowered to 10°C above the saturation point, and the seed crystal was introduced so that the seed crystal was just in contact with the liquid surface, and then the temperature was lowered at a rate of 0.5°C / day, and the rotation speed was 25r / min to start crystal growth. After the crystal growth was completed, , the crystal was lifted from the liquid surface, and then cooled to room temperature at a rate of 20°C / h to obtain a t...

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