A kind of crystal growth method for reducing lbo crystal absorption and crystal prepared therefrom

A technology of crystal growth and volume absorption, applied in crystal growth, single crystal growth, single crystal growth, etc., can solve the problems of high melt viscosity and affecting the yield of LBO crystals, so as to improve crystal quality, reduce crystal enveloping, The effect of reducing viscosity

Active Publication Date: 2021-10-15
FUJIAN CASTECH CRYSTALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, in the existing boric acid preparation method, the volume absorption value of LBO crystals can be reduced to a limited value, and boric acid is used as a cosolvent system, and the melt viscosity is very large, which makes the enveloping situation in the growth of LBO crystals more serious and affects the LBO crystal growth. Crystal Yield

Method used

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  • A kind of crystal growth method for reducing lbo crystal absorption and crystal prepared therefrom
  • A kind of crystal growth method for reducing lbo crystal absorption and crystal prepared therefrom
  • A kind of crystal growth method for reducing lbo crystal absorption and crystal prepared therefrom

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Embodiment 1

[0042] Embodiment 1: In this embodiment, the platinum seed rod has a plurality of platinum sheets parallel and inclined upward at 45°, and the growth crucible is an ordinary platinum crucible.

[0043] Mix boric acid and lithium carbonate at a molar ratio of 1:8, put them in a pvc bottle, and mix them with a shaker for no less than 10 hours. Melt the mixed raw materials in a sintering furnace and pour them into a cylindrical ordinary growth crucible. Place the growth crucible in a sealed furnace shell and heat up to 800°C, stir for 5 days, take out the stirring paddle, keep the temperature at a constant temperature for 24 hours, and slowly drop to the crystallization temperature to prepare the processed seed crystal, fix it on the platinum seed rod, and slowly penetrate into the Melt, until it just touches the liquid surface, turn on the seed rod to rotate at a speed of 30r / min, then cool down at 0.1°C / d until the end of growth, take out the crystal, and test it with a volume a...

Embodiment 2

[0044] Embodiment 2: In this embodiment, the platinum seed rod has a plurality of platinum sheets parallel and inclined upward at 45°, and the growth crucible is a beam-waisted platinum crucible.

[0045]Mix boric acid and lithium carbonate at a molar ratio of 1:8, place them in a pvc bottle, and mix them evenly with a throwing machine. Waist-shaped platinum crucible growth, put the waist-shaped platinum crucible in a sealed furnace shell and raise the temperature to 800°C, stir for 5 days, take out the stirring paddle, keep the temperature at constant temperature for 24 hours, and slowly drop to the crystallization temperature. On the above-mentioned platinum seed rod, slowly penetrate into the melt until it just touches the liquid surface, turn on the seed rod to rotate at a speed of 30r / min, then cool down at 0.1°C / d until the growth is over, take out the crystal, and test it with a volume absorption tester , the body absorption is 30ppm / cm, and the inner envelope of the cr...

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Abstract

A crystal growth method for reducing the absorption of LBO crystals and the crystal prepared therefrom. The method is to use boric acid and lithium carbonate as raw materials, and use a waist-shaped platinum crucible and a platinum seed rod as a growth device. The platinum seed rod has multiple pieces Parallel and slanted upward platinum sheets, the waist-shaped platinum crucible is small in the middle and large at both ends, with an axisymmetric structure up and down, left and right. In the present invention, a plurality of parallel platinum sheets are arranged on the platinum seed rod to dissipate heat for the platinum rod, thereby reducing the absorption value; the platinum sheet is designed in an upwardly inclined manner, which does not affect the seeding of the seed crystal and the observation of crystal growth The process prevents volatiles from falling in; the specially designed waist-shaped platinum crucible utilizes the special temperature field formed by the large ends and the small middle to avoid the influence of the specific platinum seed rod on the temperature field while maintaining accelerated melting. body flow, reduce the viscosity of the boric acid system, reduce the crystal envelope, and improve the crystal quality.

Description

technical field [0001] The invention relates to the field of crystal growth, in particular to a crystal growth method for reducing LBO crystal volume absorption and improving crystal growth quality. Background technique [0002] LBO crystal is a kind of nonlinear optical crystal with excellent optical performance. It has wide transmission range, high optical uniformity, relatively large effective double frequency coefficient and high laser damage threshold. It has important and extensive applications in optoelectronic technology, and is widely used in the fields of laser frequency conversion, optical parametric oscillation and optical parametric amplification. As the laser power becomes higher and higher, higher requirements are placed on the absorption of LBO crystal devices. [0003] The conventional method of growing LBO crystals uses corundum seed rods, molybdenum and other co-solvents, and the grown crystals have an absorption value of more than 300-400 ppm / cm due to t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/22C30B17/00
CPCC30B17/00C30B29/22
Inventor 王昌运陈伟张星陈秋华
Owner FUJIAN CASTECH CRYSTALS
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