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Method for preparing YAG-based multilayer composite structure transparent ceramic by Isobam gelcasting

A multi-layer composite and transparent ceramic technology, applied in the field of advanced ceramics, can solve the problems of general thermal effect control ability, high preparation cost, low transmittance, etc., and achieves small interface ion diffusion range, good overall performance, and good optical quality. Effect

Active Publication Date: 2018-12-21
XUZHOU ALL TO PHOTOELECTRIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the inflexibility of its preparation process and the influence of the single structure, especially the gain medium material with a single structure will produce fatal thermal effects during the operation of the laser system: thermal stress, thermal birefringence and thermal lens effect, etc., resulting in It is difficult for solid-state lasers to develop in the direction of large size and high power
However, the YAG transparent ceramics prepared by the traditional solid-state reaction sintering method have a single structure and cannot effectively control the thermal effect. In recent years, some methods for preparing composite structural materials, such as plasma spraying, heating molding, laser cladding, and magnetron sputtering There are a series of problems such as high preparation cost, poor optical quality, low transmittance, poor structural integrity, general thermal effect control ability, etc.
In recent years, great progress has been made in the preparation of multifunctional composite structure transparent ceramics by slip casting and tape casting, which have greatly improved and improved the performance of lasers. However, cold / warm isostatic pressing is required in the preparation process. , so that multiple layers can be tightly bonded, which increases the manufacturing cost, and is also not conducive to the preparation of transparent ceramics with multiple layers of complex structures and shapes.

Method used

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  • Method for preparing YAG-based multilayer composite structure transparent ceramic by Isobam gelcasting
  • Method for preparing YAG-based multilayer composite structure transparent ceramic by Isobam gelcasting
  • Method for preparing YAG-based multilayer composite structure transparent ceramic by Isobam gelcasting

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1: YAG / 1at.%Nd:YAG / 2at.%Nd:YAG

[0030]The composition of pure YAG layer is shown in 0# in Table 1, the composition of 1at.% Nd:YAG layer is shown in 1# in Table 1, and the composition of 2at.% Nd:YAG is shown in 3# in Table 1.

[0031] Concrete preparation method comprises the following steps:

[0032] (1) Weigh the raw materials according to the composition in Table 1, first put the oxide raw material powder into a high-purity alumina ceramic ball mill jar, add 375g of high-purity alumina balls, and add sintering aids MgO and TEOS, Dispersant PEI and absolute ethanol were used to prepare the slurry; on a planetary ball mill at a speed of 160r / min, ball milled for 15 hours; the obtained mixed slurry A was dried at 60°C for 24 hours and then passed through a 100-mesh sieve for 3 times. The sieved powder is calcined in a muffle furnace. The calcining process is from room temperature to 700 ° C, the heating rate is 2 ° C / min, and the temperature is kept for 6 h...

Embodiment 2

[0036] Embodiment 2: YAG / 1.5at.% Nd:YAG / YAG

[0037] The composition of the pure YAG layer is shown in 0# in Table 1, and the composition of the 1.5at.% Nd:YAG layer is shown in 2# in Table 1.

[0038] Concrete preparation method comprises the following steps:

[0039] (1) Weigh the raw materials according to the composition in Table 1, first put the oxide raw material powder into a high-purity alumina ceramic ball mill jar, add 125g of high-purity alumina balls, and add sintering aids MgO and TEOS, The dispersant PEI and absolute ethanol were used to prepare slurry; on a planetary ball mill at a speed of 120r / min, ball milled for 24 hours; the obtained mixed slurry A was dried at 50°C for 48 hours and then passed through a 100-mesh sieve for 3 times. The sieved powder is placed in a muffle furnace for calcination. The calcination process is from room temperature to 900°C, the heating rate is 3°C / min, and the temperature is kept for 8 hours, and then the temperature is natura...

Embodiment 3

[0042] Embodiment 3: YAG / 2at.% Nd:YAG / YAG

[0043] The pure YAG layer composition is shown in 0# in Table 1, and 2at.% Nd:YAG is shown in 3# in Table 1.

[0044] Concrete preparation method comprises the following steps:

[0045] (1) Weigh the raw materials according to the composition in Table 1, first put the oxide raw material powder into a high-purity alumina ceramic ball mill jar, add 250g of high-purity alumina balls, and add sintering aids MgO and TEOS, The dispersant PEI and absolute ethanol were used to prepare the slurry; on a planetary ball mill at a speed of 150r / min, ball milled for 20 hours; the obtained mixed slurry A was dried at 55°C for 36 hours and passed through a 200-mesh sieve for 3 times. The sieved powder is placed in a muffle furnace for calcination. The calcination process is from room temperature to 800°C, the heating rate is 2°C / min, the temperature is kept for 7 hours, and then the temperature is naturally lowered to 50°C. The obtained powder is c...

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Abstract

The invention discloses a method for preparing a YAG-based multilayer composite transparent ceramic by using Isobam gelcasting. The prepared multilayer ceramic satisfies a structure shown by a following formula: YAG / Re:YAG / YAG or YAG / Re: YAG / Re:YAG, wherein the YAG layer is composed of Y3A15O12, the Re:YAG layer is composed of (Y<1-x>Re<x>)<3>A<15>O<12>, x is more than or equal to 0.02 and is lessthan or equal to 0.2; Re is one of rare earth elements of cerium, praseodymium, neodymium, samarium, europium, terbium, dysprosium, holmium, erbium, thulium or ytterbium. The method comprises the steps that firstly Isobam gelcasting slurry is prepared, then the slurry is defoamed and is cast into a mold, after a first layer of the slurry gel is cured, the other layer of slurry is poured, the slurry is completely gelled, drying treatment is conducted, and the gel is discharged; biscuit after discharging the gel is vacuum sintered and annealed, and after double-sided polishing, the multilayer composite transparent ceramic is obtained. The method provided by the invention is mainly water-based slurry, green and environmentally friendly, and the obtained ceramic has the characteristics of high density, complicated structure, good optical quality, high transmittance, small interfacial ion diffusion range, and the method is very suitable for the preparation of the large size and composite YAG-based transparent ceramic material.

Description

technical field [0001] The invention belongs to the field of advanced ceramics, and relates to a preparation method of a multilayer composite structure transparent ceramic, in particular to a method for preparing a YAG-based multilayer composite structure transparent ceramic by using Isobam gel injection molding. Background technique [0002] As the working material of the laser, Nd:YAG laser ceramics have high doping atomic coefficient, excellent optical properties, high thermal conductivity, high damage threshold, high laser output efficiency, good thermal shock resistance, easy manufacturing, low cost, and large size. , mass production, and easy access to multilayer and multifunctional ceramic structures play an important role in the field of high-power solid-state lasers. YAG transparent ceramics doped with other rare earth ions such as Yb, Er, Ho, Tm and transition metal ions Cr have also attracted extensive attention in terms of generating different laser wavelengths a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/44C04B35/622
CPCC04B35/44C04B35/622C04B2235/3224C04B2235/3225C04B2235/3229C04B2235/6023C04B2235/6562C04B2235/6567C04B2235/6581C04B2235/662C04B2235/75C04B2235/9653
Inventor 张乐姚庆陈浩
Owner XUZHOU ALL TO PHOTOELECTRIC TECH CO LTD
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