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A method for preparing y-tzp powder based on low-temperature self-propagating combustion

A powder, low molecular weight technology, applied in the field of ceramic materials, can solve the problems of high production cost, expensive and complex equipment, harsh reaction conditions, etc., and achieve the effect of simplifying the production process, high purity, and controllable reaction.

Active Publication Date: 2021-03-16
SOUTH CHINA INST OF COLLABORATIVE INNOVATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the equipment required by the hydrothermal method is expensive and complicated, the reaction conditions are relatively harsh, and the production cost is relatively high.

Method used

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  • A method for preparing y-tzp powder based on low-temperature self-propagating combustion
  • A method for preparing y-tzp powder based on low-temperature self-propagating combustion
  • A method for preparing y-tzp powder based on low-temperature self-propagating combustion

Examples

Experimental program
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Effect test

Embodiment 1

[0039] A kind of Y-TZP powder, Zr:Y (molar ratio) is 32.3:1.0, selects raw material to be zirconium nitrate, yttrium nitrate and PEG-200, and preparation method comprises the following steps:

[0040] (1) Preparation of combustible solution: Take 0.6L deionized water, heat it to 60°C and stir at 100r / min, take 0.97mol of zirconium nitrate and 0.03mol of yttrium nitrate and dissolve in deionized water, add 135g of PEG200 (corresponding to 2.20mol ethylene glycol) as auxiliary fuel, add deionized water to adjust the solution to 1.2L, filter to remove impurity particles to obtain a combustible solution;

[0041] (2) Low-temperature self-propagating combustion: continue to heat the combustible product in step (1) at 60°C and stir at 100r / min for evaporation and concentration. When the solution volume is ≤0.8L, pour it into a crucible and transfer it to a muffle furnace. Heating at 300°C triggers self-propagating combustion and collects combustion products;

[0042](3) High-temper...

Embodiment 2

[0046] A kind of Y-TZP powder, Zr:Y (molar ratio) is 19:1, selects raw material to be zirconium nitrate, zirconium acetate, yttrium nitrate and PEG-200, and preparation method comprises the following steps:

[0047] (1) Preparation of combustible solution: Take 0.6L deionized water, heat it to 60°C and stir at 100r / min, calculate and weigh 30% zirconium acetate aqueous solution containing 0.10mol zirconium acetate (commercially available zirconium acetate is mostly Aqueous solution with a mass fraction of 20-30%) was added to deionized water, another 0.85mol zirconium nitrate and 0.05mol yttrium nitrate were added to the above solution for dissolution, and 102g PEG200 (corresponding to 1.65mol ethylene glycol) was added as auxiliary fuel to supplement deionized Adjust the solution to 1.5L with water, and filter to remove impurity particles to obtain a combustible solution;

[0048] (2) Low-temperature self-propagating combustion: continue to heat the combustible product in ste...

Embodiment 3

[0053] A kind of Y-TZP powder, Zr:Y (molar ratio) is 97:3, selects raw material to be zirconium nitrate, zirconium acetate, yttrium nitrate and PEG-200, and preparation method comprises the following steps:

[0054] (1) Preparation of combustible solution: Take 0.4L deionized water, heat it to 50°C and stir at 150r / min, calculate and weigh 30% zirconium acetate aqueous solution containing 0.20mol zirconium acetate (commercially available zirconium acetate is mostly Aqueous solution with a mass fraction of 20-30%) was added to deionized water, and another 0.77mol zirconium nitrate and 0.03mol yttrium nitrate were added to the above solution to dissolve, and 70g PEG200 (corresponding to 1.1mol ethylene glycol) was added as auxiliary fuel to supplement deionized Adjust the solution to 1.5L with water, and filter to remove impurity particles to obtain a combustible solution;

[0055] (2) Low-temperature self-propagating combustion: continue to heat the combustible product in step ...

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Abstract

The invention discloses a preparation method of a Y-TZP powder based on low-temperature self-propagation combustion. The preparation method comprises the following steps of preparing a metal salt water solution of Zr (zirconium) ion and Y (yttrium) ion, adding nitric acid to dissolve, and adding low molecular weight polyethylene glycol, so as to obtain a combustible solution; or, adding nitrate and / or acetate of Zr into water, adding nitrate of Y, and adding the low molecular weight polyethylene glycol, so as to obtain the combustible solution; heating the combustible solution to initiate self-propagation combustion, and collecting a combustion product; calcining the combustion product, and crushing the product, so as to obtain the Y-TZP powder. The preparation method has the advantages that the polyethylene glycol with low polymerizing degree is used as the auxiliary fuel, so that the self-propagation combustion can be initiated without complete drying, and the production technology is simplified; when the self-propagation combustion occurs, one part of water still exists in the solution, the evaporation of water is accelerated by the heat produced by combustion, the combustion product is more fluffy by a large amount of steam and the gas produced by reaction, and the reaction is more controllable.

Description

technical field [0001] The invention belongs to the field of ceramic materials, and in particular relates to a method for preparing Y-TZP (tetragonal zirconia ceramics) powder based on low-temperature self-propagating combustion. Background technique [0002] ZrO 2 It is a kind of material with high melting point, high hardness, anti-oxidation, acid and alkali corrosion resistance, etc., adding a small amount of CaO, MgO, Y 2 o 3 Stabilizer ZrO 2 The powder can be used to prepare zirconia ceramics. Y 2 o 3 Stable tetragonal zirconia ceramics (Y-TZP) have the advantages of high toughness, high strength, wear resistance, corrosion resistance and biological inertness, and are a ceramic material with a wide range of applications. [0003] At present, the common methods for industrial production of Y-TZP powder are chemical precipitation method and hydrothermal method. The chemical precipitation method has a simple process and low cost, but the product is easy to agglomera...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/48C04B35/626C04B35/632C04B35/634
CPCC04B35/48C04B35/62605C04B35/632C04B35/63488C04B2235/3225
Inventor 郑华德艾树鹤张明
Owner SOUTH CHINA INST OF COLLABORATIVE INNOVATION