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Method for preparing lithium triborate seed crystal

A technology of lithium triborate and seed crystals, which is applied in the field of preparation of lithium triborate seed crystals, can solve the problems of platinum wire seeding, which is prone to miscellaneous crystals, affects the quality of lithium triborate crystals, and the overall process is complicated.

Active Publication Date: 2021-09-07
MEISHAN BOYA ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, platinum wire seeding is prone to miscellaneous crystals, and the overall process is complicated, which affects the quality of lithium triborate crystals prepared

Method used

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  • Method for preparing lithium triborate seed crystal
  • Method for preparing lithium triborate seed crystal
  • Method for preparing lithium triborate seed crystal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0147] Step 1: Mix 20g of lithium carbonate and 80g of boric acid raw materials through an agate mortar. Put the uniformly mixed raw materials into a corundum crucible and place it in a muffle furnace. Raise the temperature of the muffle furnace to 770°C at a rate of 5°C / min, keep the temperature for 30h, and obtain the pre-synthesized powder after cooling.

[0148] Step 2: Grind the pre-synthesized powder to less than 0.15mm. 10g of ground pre-synthesized powder and 90gLi 4 Mo 5 o 17 The flux is mixed evenly with an agate mortar. Put the uniformly mixed pre-synthesized powder and flux into the platinum crucible, then place the platinum crucible in the corundum crucible, put the crucible cover on the corundum crucible and put it into the muffle furnace. Heat the muffle furnace to 750°C at a heating rate of 1°C / min and keep the temperature for 24 hours to completely melt the raw materials.

[0149] Step 3: Cool the muffle furnace down to 720°C at a cooling rate of 10°C / h,...

Embodiment 2

[0153] Step 1: Mix 24g of lithium carbonate and 76g of boric acid raw materials through an agate mortar. Put the uniformly mixed raw materials into a corundum crucible and place it in a muffle furnace. Raise the temperature of the muffle furnace to 780°C at a rate of 4°C / min, keep the temperature for 35h, and obtain the pre-synthesized powder after cooling.

[0154] Step 2: Grind the pre-synthesized powder to less than 0.15mm. 25g of ground pre-synthesized powder and 75gLi 2 MoO 4 The flux is mixed evenly with an agate mortar. Put the uniformly mixed pre-synthesized powder and flux into the platinum crucible, then place the platinum crucible in the corundum crucible, put the crucible cover on the corundum crucible and put it into the muffle furnace. Heat the muffle furnace to 780°C at a heating rate of 1°C / min and keep the temperature for 12 hours to completely melt the raw materials.

[0155] Step 3: Cool the muffle furnace down to 750°C at a cooling rate of 10°C / h, keep...

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Abstract

The embodiment of the specification provides a method for preparing a lithium triborate seed crystal, the method comprises the following steps: uniformly mixing raw materials according to a first mass ratio, wherein the raw materials comprise lithium carbonate and boric acid; putting the uniformly mixed raw materials into a pre-synthesis device for pre-synthesis operation to obtain pre-synthesized powder; grinding the pre-synthesized powder to a preset particle size; uniformly mixing the ground powder and a fluxing agent according to a second mass ratio; filling the uniformly mixed powder and fluxing agent into at least one first crucible; placing at least one first crucible in a second crucible; placing the second crucible in a heating device for melting operation, and obtaining a melt of the powder and the fluxing agent; and performing a melt-based seed crystal growth process through multiple temperature adjustment operations.

Description

technical field [0001] This description relates to the field of crystal growth, in particular to a method for preparing lithium triborate seed crystals. Background technique [0002] When growing lithium triborate crystals by the pulling method, if there is no lithium triborate seed crystal, it is usually necessary to use platinum wire for seeding. However, platinum wire seeding is prone to miscellaneous crystals, and the overall process is complicated, which affects the quality of lithium triborate crystals prepared. Therefore, it is necessary to provide an efficient and convenient method for preparing lithium triborate seed crystals. Contents of the invention [0003] One of the embodiments of this specification provides a method for preparing lithium triborate seed crystals. The method includes: uniformly mixing raw materials according to a first mass ratio, the raw materials including lithium carbonate and boric acid; placing the uniformly mixed raw materials in a pr...

Claims

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Application Information

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IPC IPC(8): C30B9/12C30B28/04C30B29/22
CPCC30B9/12C30B28/04C30B29/22
Inventor 王宇王鹏刚梁振兴
Owner MEISHAN BOYA ADVANCED MATERIALS CO LTD
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