Transparent ceramic and preparation method thereof
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A transparent ceramic and powder technology, applied in the field of transparent ceramics and its preparation, can solve the problems of material thermal conductivity loss, aggravated thermal effect of laser system and pump light darkening effect, etc.
Inactive Publication Date: 2021-12-10
XUZHOU NORMAL UNIVERSITY
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[0006] The purpose of the present invention is to overcome the deficiencies in the prior art, provide a kind of preparation method of solid laser gain medium, to solve the problem of adding sintering aids in the prior art to produce Y 2 o 3 Transparent ceramics, which can lead to a loss of thermal conductivity of the material, exacerbating the technical problems of laser system thermal effects and pump photodarkening effects
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preparation example Construction
[0037] Such as Figure 1 to Figure 4 Shown, a kind of preparation method of transparent ceramics is characterized in that, comprises:
[0038] Step A, put Y 2 o 3 and Er-containing dopants according to the chemical formula (Er x Y 1-x ) 2 o 3 Weigh and mix to obtain mixed powder, wherein, 0.0005≤x≤0.005, and successively undergo ball milling, drying, grinding, sieving and calcining to obtain Er:Y 2 o 3 Powder;
[0039] When Er 3+ When the ion concentration is higher than 0.5 at.%, there will be a more obvious up-conversion phenomenon, and the up-conversion is not conducive to the generation of 1.6 μm laser. Therefore, the optimal situation is according to the chemical formula (Er x Y 1-x ) 2 o 3 (0.0005≤x≤0.005) Weigh the raw materials.
[0040] Preparation of Er in step A: Y 2 o 3 The powder steps include:
[0041] The weighed high-purity Y 2 o 3and Er-containing dopants are placed in a ball mill and absolute ethanol is added to obtain a slurry with a powde...
Embodiment 1
[0061] Use commercial high-purity Y 2 o 3 and Er 2 o 3 powder as raw material. According to the chemical formula (Er 0.0025 Y 0.9975 ) 2 o 3 The raw material is weighed, wherein the yttrium oxide is 80g. After adding 100 mL of absolute ethanol and 500 g of zirconia balls, ball milling was carried out. The rotational speed of the ball mill was 140 rpm, and the ball milling time was 10 h. After the materials are mixed evenly, put them into an oven at 50°C to dry for about 48 hours, then grind them and sieve them, and finally calcinate them in a muffle furnace for 3 hours at a calcination temperature of 800°C to obtain Er:Y 2 o 3 Powder.
[0062] Er:Y 2 o 3 The powder is first unidirectionally pressed under a pressure of 5MPa. In order to further increase the density, the green body is subjected to cold isostatic pressing under 200MPa to obtain Er:Y 2 o 3 Ceramic bisque.
[0063] The green body was sintered at 1500°C for 5 hours in a flowing oxygen atmosphere, and ...
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Abstract
The invention discloses a transparent ceramic which is prepared by the following steps of: weighing and mixing Y2O3 and a doping agent containing Er according to a chemical formula (Er<x>Y<1-x>)2O3 (x is more than or equal to 0.0005 and less than or equal to 0.005), and sequentially carrying out ball milling, drying, grinding, sieving and calcining treatment to obtain Er: Y2O3 powder; carrying out molding treatment on the Er: Y2O3 powder to obtain a green body; and placing the green body in a vacuum environment of 1400-1800 DEG C for sintering for 0.5-50 h, then performing hot isostatic pressing sintering in inert gas of 1400-1800 DEG C for 0.5-8 h, finally annealing in air or oxygen atmosphere of 600-1300 DEG C for 0.5-30 h, and performing two-side polishing to obtain Er: Y2O3 transparent ceramic. The Er: Y2O3 transparent ceramic with high optical quality can be prepared by adopting a mode of combining vacuum sintering and hot isostatic pressing treatment on the premise of not additionally adding a sintering aid. Under excitation of a proper pumping source, <4>I<13/2>-><4>I<15/2> energy level transition of Er < 3 + > ions can be utilized, and under the condition that a pump light darkening effect is not generated, 1.6 [mu] m laser which can be safely absorbed by human eyes can be output.
Description
technical field [0001] The invention relates to a transparent ceramic and a preparation method thereof, belonging to the technical field of transparent ceramics. Background technique [0002] to Y 2 o 3 The representative sesquioxide material has the advantages of low phonon energy, low thermal expansion coefficient, high thermal conductivity, high laser damage threshold, etc., and is one of the ideal solid-state laser gain media. However, due to the extremely high melting point of sesquioxide materials (>2400°C), it is difficult to achieve large-scale single crystal preparation with high optical quality. Using the ceramic molding process, it is easier to prepare large-sized blanks. Combined with the control of the sintering system, the transparency of sesquioxide ceramics can be realized at a sintering temperature far lower than the melting point of the material (1400-1800°C). In addition, compared with single crystal materials, sesquioxide ceramics have higher mechan...
Claims
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