Method for preparing YAG transparent ceramics based on improved Isobam gel system

A technology of transparent ceramics and gels, applied in the field of transparent ceramics preparation, can solve the problems of reducing the transmittance of YAG transparent ceramics, insufficient densification of green bodies, affecting the efficiency of preparation, etc. The effect of improving transmittance

Active Publication Date: 2018-09-11
XUZHOU NORMAL UNIVERSITY
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, in order to ensure better fluidity of the slurry, the current gel forming technology generally has a solid content of less than 70wt.%, which leads to insufficient densification of the green body and low density
Due to the inherent properties of the Isobam gel system, the strength of the green body is not high,

Method used

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  • Method for preparing YAG transparent ceramics based on improved Isobam gel system
  • Method for preparing YAG transparent ceramics based on improved Isobam gel system

Examples

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[0044] Example 1

[0045] A method for preparing YAG transparent ceramics based on an improved Isobam gel system, which includes the following steps:

[0046] Step one, follow Y 3 Al 5 O 12 The stoichiometric ratio of the molecular formula weighs high-purity nano Y separately 2 O 3 Powder (average particle size of 500nm) 53.676g, high purity nano Al 2 O 3 Powder (average particle size of 200nm) 71.324g;

[0047] Step 2: 375g high-purity alumina grinding balls, 156.25ml absolute ethanol, 0.5ml dispersant PEI, sintering aid SiO 2 0.625g and the weighed nano-oxide powder are put into a nylon ball mill tank, and the ball mill is mixed at a speed of 160r / min for 15 hours to obtain mixed slurry A;

[0048] Step 3. Take out the mixed slurry A and bake it in an oven at 60°C for 24 hours, pass a 150-mesh sieve, and place the sieved powder in a muffle furnace for calcination. The temperature is raised from room temperature to 700°C at a rate of temperature rise 2℃ / min, heat preservation for 8 ...

Example Embodiment

[0058] Example 2

[0059] A method for preparing YAG transparent ceramics based on an improved Isobam gel system, which includes the following steps:

[0060] Step one, follow Y 3 Al 5 O 12 The stoichiometric ratio of the molecular formula weighs high-purity nano Y separately 2 O 3 Powder (average particle size of 600nm) 34.352g, high purity nano Al 2 O 3 Powder (average particle size of 600nm) 45.648g;

[0061] Step 2. Combine 80g of high-purity alumina ball, 66.67ml of absolute ethanol, 0.08ml of dispersant PEI, and sintering aid SiO 2 0.04g and 0.04g of MgO, together with the weighed nano-oxide powder, are put into an alumina ceramic ball milling tank, and the ball mill is mixed at a speed of 120r / min for 24 hours to obtain mixed slurry A;

[0062] Step 3. Take out the mixed slurry A and place it in an oven at 50°C for 48 hours, pass a 100-mesh sieve, and place the sieved powder in a muffle furnace for calcination. The temperature is increased from room temperature to 800°C at a ra...

Example Embodiment

[0069] Example 3

[0070] A method for preparing YAG transparent ceramics based on an improved Isobam gel system, which includes the following steps:

[0071] Step one, follow Y 3 Al 5 O 12 The stoichiometric ratio of the molecular formula weighs high purity nano Y 2 O 3 Powder (average particle size 550nm) 214.703g, high purity nano Al 2 O 3 Powder (average particle size of 400nm) 285.297g;

[0072] Step two, 1200g high-purity alumina grinding balls, 604.17ml absolute ethanol, 4ml dispersant PEI, sintering aid SiO 2 Put 1.25g together with the weighed nano-oxide powder into a polytetrafluoroethylene ball milling tank, and mix and ball mill at a speed of 150r / min for 20 hours to obtain mixed slurry A;

[0073] Step 3. Take out the mixed slurry A and place it in an oven at 55°C for 36 hours, pass a 200-mesh sieve, and place the sieved powder in a muffle furnace for calcination. The temperature is raised from room temperature to 900°C at a rate of temperature rise It is 3℃ / min, heat pr...

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Abstract

The invention discloses a method for preparing YAG transparent ceramics based on an improved Isobam gel system. The method comprises the following steps that (1) grinding balls, an organic solvent, adispersing agent A, a sintering additive and ceramic powder are placed into a ball mill tank, ball milling and mixing are carried out to obtain mixed slurry A; (2) the mixed slurry A is dried, sievedand calcined to obtain raw material powder conducted with gel injection molding; (3) deionized water, an Isobam solution, an epoxy resin cross-linking agent, a pH conditioning agent, a dispersing agent B and the grinding balls are added into the ball mill tank, lastly, the raw material powder is added, after preliminary stirring is carried out, and then ball milling and mixing are carried out to obtain mixed slurry B with high solid content; (4) vacuum degassing, injection molding, gel drying and curing and gel discharging are carried out; (5) vacuum sintering, annealing and polishing are carried out on biscuit after gel discharging, and the YAG transparent ceramics are obtained. The provided method for preparing the YAG transparent ceramics based on the improved Isobam gel system has theadvantages that the solid content of the ceramic slurry is improved, the density of the biscuit is improved, the permeability of the YAG transparent ceramics prepared by vacuum sintering is greatly improved, the technology is simple, and the method is conductive to industrialized production.

Description

technical field [0001] The invention belongs to the technical field of preparation of transparent ceramics, in particular to a method for preparing YAG transparent ceramics based on an improved Isobam gel system. Background technique [0002] Yttrium aluminum garnet (YAG for short) has a stable cubic phase structure, no birefringence, high melting point, and good chemical and photochemical stability. It is widely used in laser matrix gain materials, and can also be used to make high-temperature visible and infrared windows. Compared with YAG single crystal, YAG transparent ceramics can meet the large size and higher doping concentration required for the preparation of high-power lasers, so YAG has almost all the advantages of an ideal laser host material, and has shown good performance in replacing YAG single crystal application prospects. The preparation of YAG transparent ceramics includes powder preparation, molding, sintering and machining processes. The purpose of the...

Claims

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Application Information

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IPC IPC(8): C04B35/44C04B35/634C04B35/622
CPCC04B35/44C04B35/622C04B35/63424C04B35/63456C04B35/63476C04B2235/3206C04B2235/3208C04B2235/3225C04B2235/3418C04B2235/5445C04B2235/6023C04B2235/6562C04B2235/6565C04B2235/6567C04B2235/662C04B2235/9653
Inventor 张乐姚庆袁子田周天元高光珍王骋陈浩
Owner XUZHOU NORMAL UNIVERSITY
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