Preparation method of large-size complex-shape high-transmittance lanthanum gadolinium zirconate transparent ceramics

A technology of lanthanum gadolinium zirconate and complex shape, which is applied to the preparation of lanthanum gadolinium zirconate transparent ceramics with large size and complex shape and high transmittance, and the preparation of transparent ceramic materials, and can solve the problem of large-scale and complex shape preparation in large quantities. The problems of lanthanum gadolinium zirconate transparent ceramics, small size and fixed shape samples, difficulty in large size and complex shape, etc., achieve the effect of easy industrialized mass production, environmentally friendly and non-toxic additives, and reduced production costs

Pending Publication Date: 2021-07-13
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the combustion method and the co-precipitation method require a variety of auxiliary reagents to participate in the chemical reaction, the operation is more complicated, and the environment is polluted, and industrial production is more difficult.
[0006] However, research on another important transparent ceramic preparation process—ceramic forming process is still at the stage of preparing small-sized fixed-shape samples by dry pressing.
The above-mentioned studies and patents all adopt the dry pressing method to prepare the ceramic green body. The principle is that the powder is aggregated into a fixed shape ceramic green body under the action of mechanical external force. Although the dry pressing method has the advantages of mature technology, simple operation and short molding time, Its principle determines that the ceramic biscuit prepared by dry pressing method has low strength, is easy to crack and deform, and it is difficult to realize large size and complex shape, which cannot meet actual needs.
[0007] In summary, the existing research and inventions have not yet solved the problem of "mass preparation of large-scale and complex-shaped lanthanum-gadolinium zirconate transparent ceramics"

Method used

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  • Preparation method of large-size complex-shape high-transmittance lanthanum gadolinium zirconate transparent ceramics
  • Preparation method of large-size complex-shape high-transmittance lanthanum gadolinium zirconate transparent ceramics
  • Preparation method of large-size complex-shape high-transmittance lanthanum gadolinium zirconate transparent ceramics

Examples

Experimental program
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Effect test

Embodiment 1

[0039] A large size and complex shape with high transmittance La 0.4 Gd 1.6 Zr 2 o 7 The preparation method of transparent ceramics comprises the following steps:

[0040] (1) Powder preparation: Add the raw materials zirconia, lanthanum oxide and gadolinium oxide powder into ethanol in a molar ratio of 4:0.6:1.4 and mix them evenly; mill the mixed solution with a 2mm ball mill whose mass is 25 times that of the raw material powders Put the balls together in a planetary ball mill at 250rpm for 24h, then place them in a drying oven and dry them at 60°C for 20h; after they are completely dry, grind the obtained solid particles and sieve them in a 200-mesh plastic screen, and then put them in a muffle furnace Calcined at 900°C for 3 hours in a medium air environment to obtain the precursor powder.

[0041] (2) Slurry preparation: the precursor powder of step (1) is mixed with isobutylene maleic anhydride copolymer (Isobam), ammonium citrate (TAC) and deionized water according...

Embodiment 2

[0046] A LaGdZr with large size and complex shape with high transmittance 2 o 7 The preparation method of transparent ceramics comprises the following steps:

[0047] (1) Powder preparation: Add zirconia, lanthanum oxide and gadolinium oxide powders into ethanol in a molar ratio of 4:1:1 and mix them evenly; mill the solution after mixing with a 2mm ball mill whose mass is 27 times that of the raw material powders Put the balls together in a planetary ball mill at 250rpm for 24h, then place them in a drying oven and dry them at 60°C for 20h; after they are completely dry, grind the obtained solid particles and sieve them in a 200-mesh plastic screen, and then put them in a muffle furnace Calcined at 900°C for 2 hours in a medium air environment to obtain the precursor powder.

[0048] (2) Slurry preparation: the precursor powder of step (1) and isobutylene maleic anhydride copolymer (Isobam), ammonium citrate (TAC) and deionized water are in the mass fraction 65wt% in the sl...

Embodiment 3

[0053] A LaGdZr with large size and complex shape with high transmittance 2 o7 The preparation method of transparent ceramics comprises the following steps:

[0054] (1) Powder preparation: Add zirconia, lanthanum oxide and gadolinium oxide powders into ethanol in a molar ratio of 4:1:1 and mix them evenly; mill the solution after mixing with a 2mm ball mill whose mass is 27 times that of the raw material powders Put the balls together in a planetary ball mill at 250rpm for 24h, then place them in a drying oven and dry them at 60°C for 20h; after they are completely dry, grind the obtained solid particles and sieve them in a 200-mesh plastic screen, and then put them in a muffle furnace Calcined at 900°C for 2 hours in a medium air environment to obtain the precursor powder.

[0055] (2) Slurry preparation: the precursor powder of step (1) and isobutylene maleic anhydride copolymer (Isobam), ammonium citrate (TAC) and deionized water are pressed in the mass fraction of slurry...

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Abstract

The invention provides a preparation method of large-size complex-shape high-transmittance lanthanum gadolinium zirconate transparent ceramics based on an Isobam gel system. The method comprises the following main steps: powder preparation, slurry preparation, biscuit preparation and ceramic sintering. The invention also discloses three kinds of lanthanum gadolinium zirconate transparent ceramics with large size, complex shape and high transmittance, which are prepared by the method. A water-based Isobam gel system is adopted, the method of the system is simple and easy to operate, high in universality, environmentally friendly and non-toxic, and industrial preparation of the lanthanum gadolinium zirconate transparent ceramic with the large size, the complex shape and the high transmittance can be achieved without preparation of pure-phase powder; and the requirements of application fields such as high-refractive-index optical lenses, infrared windows, scintillator materials and comprehensive shielding windows are met.

Description

technical field [0001] The invention belongs to the technical field of ceramic materials, and relates to a preparation method of a transparent ceramic material, in particular to a preparation method of a large-sized complex-shaped high-transmittance lanthanum-gadolinium zirconate transparent ceramic based on an Isobam gel system. Background technique [0002] Transparent ceramics are a new type of ceramics that utilize the optical properties of ceramic materials. In addition to the typical characteristics of traditional ceramics such as corrosion resistance, high temperature resistance, and good electrical insulation, they also have the optical properties of glass. Compared with single crystals, transparent ceramics have low manufacturing costs, are easy to mass-produce, and can be made into products with large sizes and complex shapes; compared with glass, transparent ceramics have high strength and hardness, large optical transmission range, and thermal conductivity. It ha...

Claims

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Application Information

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IPC IPC(8): C04B35/48C04B35/50C04B35/622C04B35/624
CPCC04B35/48C04B35/50C04B35/622C04B35/624C04B2235/3224C04B2235/3227C04B2235/3244C04B2235/602C04B2235/606C04B2235/656C04B2235/6562C04B2235/6567C04B2235/6581C04B2235/663C04B2235/9653
Inventor 卢铁城梁乐行齐建起唐喆刘啊姣袁海峰邓世溦
Owner SICHUAN UNIV
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