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Method for preparing semitransparent yttrium vanadate ceramic
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A yttrium vanadate and translucent technology is applied in the field of preparation of translucent yttrium vanadate ceramics, which can solve the problems of staying and cannot meet demands, and achieves the effects of low equipment requirements, good mechanical properties and stable casting process.
Active Publication Date: 2014-08-20
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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Abstract
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Problems solved by technology
Due to the limitation of single crystal growth technology, the growth of high-quality yttrium vanadate crystals at home and abroad has remained at a small level, which cannot meet the demand for large-sized high-quality crystals in the application of larger polarizers.
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Embodiment 1
[0023] Mix polycrystalline yttrium vanadate powder, xylene, herring oil, and silicone oil in a mass ratio of 1:1:0.03:0.01, and ball mill for 12 hours until uniform; add PAG and PVB to the obtained slurry, and the amount of PVB is powder 5% of the body weight, PAG:PVB mass ratio is 0.6, ball milling again for 12h; after vacuum defoaming, pour the slurry into the casting machine hopper, and carry out tape casting: fix the blade height to 500 μm, and adjust the casting speed to 0.35m / min, casting temperature 35°C; after drying, take out the cast sheet, cut it to a suitable size, and collect the biscuit; degrease at 800°C; under the protection of oxygen environment, sinter at 1570°C and hold for 10 hours to obtain translucent Yttrium vanadate ceramics, such as figure 1 shown.
Embodiment 2
[0025] Mix polycrystalline yttrium vanadate powder, xylene, herring oil, and silicone oil in a mass ratio of 1:1.5:0.03:0.01, and ball mill for 12 hours until uniform; add BBP and PVB to the obtained slurry, and the amount of PVB is powder 4% of the body weight, PAG:PVB mass ratio is 0.8, ball milling again for 12h; after vacuum defoaming, pour the slurry into the casting machine hopper, and carry out tape casting: fix the blade height to 400 μm, and adjust the casting speed to 0.35m / min, casting temperature 35°C; after drying, take out the casting sheet, cut it to a suitable size, and collect the biscuit; degrease at 800°C; then sinter at 1580°C under the protection of oxygen environment, and keep it for 10 hours to get half Transparent yttrium vanadate ceramics, such as figure 2 shown.
Embodiment 3
[0027] Mix polycrystalline yttrium vanadate powder, xylene, herring oil, and silicone oil in a mass ratio of 1:1.5:0.03:0.01, and ball mill for 24 hours for the first time until uniform; 4% of the body weight, PAG+BBP:PVB mass ratio is 0.8, and ball milled for 12 hours again; after vacuum defoaming, pour the slurry into the hopper of the casting machine for tape casting: fix the blade height to 800 μm, and adjust the casting speed 0.40m / min, casting temperature 35°C; after drying, take out the cast sheet, cut it to a suitable size, and collect the biscuit; degrease at 800°C; then sinter at 1550°C under the protection of low oxygen environment, and keep it for 10h After that, translucent yttrium vanadate ceramics are obtained, such as image 3 shown.
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Abstract
The invention relates to a method for preparing semitransparent yttrium vanadate ceramic, which belongs to the technical field of preparation of functional ceramics and inorganic materials. Yttrium vanadate polycrystal powder is used as a raw material, and the polycrystal powder, solvent, a dispersing agent and a defoaming agent are mixed by mass ratio and subjected to ball milling for 12-24 hours. A plasticizer and a binder are added into a paste material, and then the ball milling is further performed for 8-16 hours. The knife edge height is fixed in a range of 300-1000 mum, the casting speed and the temperature are adjusted, and the paste material after being subjected vacuum defoaming is placed in a casting machine hopper to be casted and formed. Formed casting sheets are fetched out, and samples are collected. After degreasing in the temperature atmosphere of 600-900 DEG C, the semitransparent yttrium vanadate ceramic is obtained through sintering at the temperature of 1500-1650 DEG C under the protection of oxygen environment. The semitransparent yttrium vanadate ceramic prepared by the method has the advantages of being low in temperature, simple in device, convenient to operate, low in cost and the like.
Description
technical field [0001] The invention relates to a method for preparing translucent yttrium vanadate ceramics, which belongs to the technical field of preparation of functional ceramics and inorganic materials. Background technique [0002] Yttrium vanadate crystal is a kind of single crystal usually grown by pulling method. Because of its excellent birefringence characteristics and wide transmission band from 400-5000nm, the light damage value is large (21-28GW / cm 2 ), good optical uniformity (Δn=10 -6 ), high hardness and other outstanding advantages, so it becomes an ideal material for making optical polarization components. Can replace calcite (CaCO 3 ) and rutile (TiO 2 ) to make fiber optic isolators, ring mirrors, light displacers, splitters, Glan polarizers and other polarizing devices. [0003] At present, yttrium vanadate crystals have been widely used in optical isolators, circulators, optical beam splitters and infrared polarizers in optical brazing communicat...
Claims
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Application Information
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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/505C04B35/495C04B35/622
Inventor 曹永革费斌杰郭旺黄秋凤
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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