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Raw material pressing die and pressing method for growing crystals by horizontal directional solidification method
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A technology for horizontal orientation and crystal growth, applied in self-solidification, crystal growth, single crystal growth, etc., can solve the problems of easily damaged raw material ratio metal impurities, thin product thickness, cumbersome process, etc. , Improving the pressing efficiency and the effect of improving the preparation efficiency
Pending Publication Date: 2022-03-04
CHINA ELECTRONICS TECH GRP NO 26 RES INST
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[0004] At present, most of the raw material pressing methods are designed for crystal growth methods such as the pulling method and the Kyropoulos method. The pressed raw materials are formed into cylinders. If they are to be put into the boat-shaped crucible used by the horizontal directional solidification method, large On both sides of the cylinder, it is easy to destroy the ratio of raw materials and introduce metal impurities
Or use pressed small round rod-shaped raw materials, which will form a larger gap in the boat-shaped crucible, leaving more space, resulting in a thinner product with a lower quality. At the same time, this small round rod solution requires Use and dismantle multiple binder abrasives, the process is cumbersome
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Embodiment 1
[0056] Using the raw material pressing method of the present invention, the Ce:YAG / Al2O3 eutectic ceramic raw material with a doping ratio of 0.25% is pressed, using 5N high-purity raw materials, and 5 parts of raw materials are configured according to the mass ratio of CeO2:Y2O3:Al2O3=0.13:33.44:66.43 , each raw material 1.2kg.
[0057] Put each raw material into a sealed bag separately, squeeze out the air in the sealed bag, and close the mouth of the sealed bag.
[0058] Put the two fan-shaped modules into the bottom of the cylindrical barrel, and the arc edges of the two fan-shaped modules are attached to the inner wall of the barrel.
[0059] Put a sealed bag with raw materials between the two fan-shaped modules, and shake the cylindrical barrel to make the raw materials in the sealed bag fill the space between the two fan-shaped modules.
[0060] Place the round divider over the fan block and seal bag, pressing the area of the round divider above the seal bag to pack ...
Embodiment 2
[0069] Using the raw material pressing method of the present invention, the Yb:YAG / Al2O3 eutectic ceramic raw material with a doping ratio of 1% is pressed, using 5N high-purity raw materials, and 5 parts of raw materials are configured according to the molar ratio of Yb2O3:Y2O3:Al2O3=0.03:2.97:5 , each raw material 3kg.
[0070] Put each raw material into a sealed bag separately, squeeze out the air in the sealed bag, and close the mouth of the sealed bag.
[0071] Put two bow-shaped rubber abrasives into the bottom of the cylindrical barrel, and the curved edge fits the inner wall of the barrel.
[0072] Put a sealed bag with raw materials between the two fan-shaped modules, and shake the cylindrical barrel to make the raw materials in the sealed bag fill the space between the fan-shaped modules.
[0073] Place a round divider over the fan block and seal bag, pressing the area of the round divider above the seal bag to pack the ingredients as tightly as possible.
[0074...
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Abstract
The raw material pressing mold comprises a cylindrical barrel, the cylindrical barrel is composed of a barrel body and a barrel bottom connected with one end of the barrel body in a sealed mode, the opening end of the cylindrical barrel faces upwards, and the opening end of the cylindrical barrel is closed through a barrel cover tightly attached to the inner wall of the barrel body. The can cover is composed of a cover plate and a cover edge protruding upwards from the edge of the cover plate, and the outer wall of the cover edge is attached to the inner wall of the can body. A fixed mold is movably arranged in the cylindrical barrel and is provided with a mold cavity for shaping a raw material to be pressed; an inner ring is horizontally arranged on the inner wall of the cover edge so as to support the open end of the barrel cover, an outer hoop ring corresponding to the inner ring in position is arranged on the barrel body in a sleeving mode so that a closed sealing space can be formed by the cylindrical barrel and the barrel cover, and the cylindrical barrel and the barrel cover are both made of extrudable soft rubber materials. According to the invention, a plurality of near-boat-shaped raw materials can be pressed at one time, the most space of the boat-shaped crucible is occupied, the density of the raw materials is increased by using isostatic pressing, the preparation efficiency of crystals is improved, and products with larger thickness are grown.
Description
technical field [0001] The invention relates to the technical field of crystal material preparation, in particular to a raw material pressing mold and a pressing method for growing crystals by a horizontal directional solidification method. Background technique [0002] The horizontal directional solidification method is a crystal growth method suitable for growing a variety of large-scale lath-shaped materials. The sapphire grown by it is used for bulletproof portholes of aircraft and submarines, and laser crystals such as Yb:YAG and Nd:YAG are used for large High-power laser weapons, high-power lasercutting machines, etc. YAG / Al2O3 eutectic ceramics can be used in aircraft engine components, and Ce:YAG / Al2O3 eutectic ceramics can be used in high-lumen LED light-emitting devices. When growing a variety of materials, the horizontal directional solidification method has the advantages of low cost, high product quality, no core side center, and easy processing into lath-shape...
Claims
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Application Information
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