Preparation die and preparation method for blocky raw material for terbium-gallium garnet crystal growth
A technology for terbium gallium garnet and crystal growth, which is applied in the directions of crystal growth, single crystal growth, single crystal growth, etc., can solve the problems of long production time, poor crystal quality, secondary pollution, etc., so as to improve the crystal growth efficiency and reduce the Production cost, the effect of avoiding equipment failure
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[0031] The present invention is used for the preparation method of bulk raw materials for terbium gallium garnet crystal growth. In this preparation method, the aforementioned block raw materials for terbium gallium garnet crystal growth are used to prepare molds. The specific preparation steps are as follows:
[0032] 1) The high-purity raw material Tb with a purity greater than 99.99% 4 o 7 and Ga 2 o 3 Batching is carried out according to the molar ratio of 3:10~10.8, and then the two are fully mixed on the mixer, usually the time is about 30 hours, the mixed raw materials are put into the cylindrical barrel for preparing the mold, and then the cover is covered, and passed through Bolts and nuts fix and compress the installation part, cover plate and two hard sealing rings, so that the raw materials in the cylindrical barrel are completely sealed;
[0033] 2) Put the sealed preparation mold with mixed raw materials in the isostatic press, which transmits the pressure thr...
Embodiment 1
[0039] The high-purity raw material (greater than 99.99%) Tb 4 o 7 and Ga 2 o 3 Tb 4 o 7 : Ga 2 o 3=3: (10~10.3) Do the batching, fully mix on the mixer for 30 hours, put the mixed raw materials into the above extrusion mold, press and seal; prepare the sealed mold with the mixed raw materials Place it in an isostatic press (the isostatic press transmits pressure through a liquid medium), adjust the pressure at about 200 MPa, pressurize the mold with the mixed raw materials through the liquid medium, and pressurize for 30 minutes. After reaching normal pressure, demould to obtain a cylindrical block material with a diameter of 78 mm and a height of 90 mm, which is put into an iridium crucible with a diameter of 80 mm and a height of 60 mm for growth.
Embodiment 2
[0041] The high-purity raw material (greater than 99.99%) Tb 4 o 7 and Ga 2 o 3 Tb 4 o 7 : Ga 2 o 3 =3: (10.3~10.6) Do the batching, fully mix on the mixer for 30 hours, put the mixed raw materials into the above extrusion mold, press and seal; prepare the sealed mold with the mixed raw materials Place it in an isostatic press (the isostatic press transmits pressure through a liquid medium), adjust the pressure at about 200 MPa, pressurize the mold with the mixed raw materials through the liquid medium, and pressurize for 50 minutes. After reaching normal pressure, demould to obtain a cylindrical block material with a diameter of 98 mm and a height of 125 mm, which was placed in an iridium crucible with a diameter of 100 mm and a height of 80 mm to grow large-sized terbium gallium garnet crystals.
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