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Method for preparing toughened large-size ultrathin YAG transparent ceramic biscuit based on Isobam gel system

A transparent ceramic, large-scale technology, applied in the field of advanced ceramics, can solve the problems of difficult demoulding, insufficient toughness, hindering the injection of slurry into the mold, etc., achieving the effect of not easy to crack, ensuring thickness, and easy demoulding

Inactive Publication Date: 2020-06-09
XINYI XIYI ADVANCED MATERIALS RES INST OF IND TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, for the molding requirements of large-scale ultra-thin parts, the Isobam gel system faces the following molding difficulties: (1) The thickness of the sheet is ≤0.5mm, and the tension of the water will hinder the injection of the slurry into the mold; (2) It is difficult to demold the green sheet after molding , insufficient toughness; (3) The flatness of the blank still needs to be further improved

Method used

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  • Method for preparing toughened large-size ultrathin YAG transparent ceramic biscuit based on Isobam gel system
  • Method for preparing toughened large-size ultrathin YAG transparent ceramic biscuit based on Isobam gel system
  • Method for preparing toughened large-size ultrathin YAG transparent ceramic biscuit based on Isobam gel system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) According to Y 3 al 5 o 12 The stoichiometric ratio of the molecular formula weighs Y at the nanoscale, respectively 2 o 3 Powder 71.324g, Al 2 o 3 The powder is 53.676g. Put the above-mentioned 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 Prepare the slurry; mill it on a planetary ball mill at a speed of 160r / min for 15 hours; dry the obtained mixed slurry A at 60°C for 24 hours and pass it through a 100-mesh sieve for 3 times, and place the sieved powder in a Calcination in a Furnace, the calcination process is from room temperature to 700 ° C, the heating rate is 2 ° C / min, 6 hours of heat preservation, and then naturally cooled to room temperature, the prepared powder is the raw material powder for gel injection molding. Then add deionized water, Isobam104 solution, dispersant ammonium citrate, high-purity alumin...

Embodiment 2

[0030] (1) According to Y 3 al 5 o 12 The stoichiometric ratio of the molecular formula weighs Y at the nanoscale, respectively 2 o 3 Powder 71.324g, Al 2 o 3The powder is 53.676g. Put the above-mentioned 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, dispersant PEI, and absolute ethanol Prepare the slurry; mill it on a planetary ball mill at a speed of 120r / min for 24 hours; dry the obtained mixed slurry A at 50°C for 48 hours and pass it through a 100-mesh sieve for 3 times, and place the sieved powder in a Calcination in a Furnace, the calcination process is from room temperature to 900 ° C, the heating rate is 3 ° C / min, 8 hours, and then naturally cooled to 100 ° C, the prepared powder is the raw material powder for gel injection molding. Then add deionized water, Isobam104 solution in the ball mill jar, dispersant is polyethylene glycol, high-purity alumina gr...

Embodiment 3

[0034] (1) According to Y 3 al 5 o 12 The stoichiometric ratio of the molecular formula weighs Y at the nanoscale, respectively 2 o 3 Powder 71.324g, Al 2 o 3 The powder is 53.676g. Put the above-mentioned 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, dispersant PEI, and absolute ethanol Prepare the slurry; mill it on a planetary ball mill at a speed of 150r / min for 20 hours; dry the obtained mixed slurry A at 55°C for 36 hours and pass it through a 200-mesh sieve for 3 times, and place the sieved powder in a Calcination in a Furnace, the calcination process is from room temperature to 800°C, the heating rate is 2°C / min, the temperature is kept for 7h, and then the temperature is naturally lowered to 50°C. The powder obtained is the raw material powder for gel injection molding. Then add deionized water, Isobam104 solution, dispersant ammonium polyacrylate, high-puri...

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Abstract

The invention discloses a method for preparing a toughened large-size ultrathin YAG transparent ceramic biscuit based on an Isobam gel system. The method comprises the following steps: respectively weighing Y2O3 powder and Al2O3 powder as ceramic powder; mixing and ball-milling the ceramic powder, a sintering aid, a dispersing agent A, grinding balls and absolute ethyl alcohol according to a certain proportion to obtain mixed slurry; drying the mixed slurry, sieving and calcining the material, and obtaining the raw material powder formed through gel casting; mixing and ball-milling deionized water, an Isobam 104 solution, a dispersing agent B, a plasticizer, grinding balls and the raw material powder according to a certain proportion, adjusting the pH value of the system to be 10-12, and preparing the ceramic slurry; and performing vacuum defoaming, pouring the defoamed slurry into a mold by adopting a pressure injection method, performing natural gel curing at room temperature, and performing drying and gel discharging to obtain the YAG ceramic biscuit. The preparation process is simple and environmentally friendly, and the prepared ultrathin ceramic biscuit is good in flatness, not prone to cracking and easy to demold.

Description

technical field [0001] The invention belongs to the field of advanced ceramics, and relates to a method for preparing large-scale ultra-thin transparent ceramics, in particular to a method for preparing toughened large-scale ultra-thin YAG transparent ceramic green bodies based on an Isobam gel system. Background technique [0002] YAG transparent ceramics have the inherent high temperature resistance, corrosion resistance, high insulation, high strength and other characteristics of ceramics, as well as the optical properties of glass. They are widely used in lighting display technology, optical technology, special instrument manufacturing, wireless electronics, information detection, high temperature technology and It has broad application prospects in military industry and other fields. Especially in the field of display, it can be used in various visible light and infrared light transmission windows and display panels of various devices, and YAG can be used as a matrix ma...

Claims

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Application Information

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IPC IPC(8): C04B35/44C04B35/624C04B35/632
CPCC04B35/44C04B35/624C04B35/632C04B2235/3206C04B2235/3225C04B2235/483C04B2235/6023C04B2235/6562C04B2235/6567C04B2235/9653
Inventor 张乐姚庆高攀康健陈东顺黄国灿李明陈浩
Owner XINYI XIYI ADVANCED MATERIALS RES INST OF IND TECH CO LTD
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