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3 YSZ nano powder, preparation method and use thereof

A nano-powder and zirconia technology, applied in the field of material science, can solve the problems of pollution, long ball milling time, high cost, etc., and achieve the effect of good repeatability, simple and convenient process, and short cycle

Inactive Publication Date: 2017-01-04
INNER MONGOLIA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the coprecipitation method is used to prepare 3YSZ powder, the precipitate is prone to agglomeration during washing, filtration, and drying, which makes the powder particle size larger and poor in dispersibility. In addition, a large amount of water is required in the process of washing chloride ions, which is costly and easy to cause Pollution, energy consumption and increased preparation costs
The traditional solid-phase mechanical mixing method generally adopts ball milling technology, and the particle size of the zirconia balls in the grinding body is relatively large, which makes the synthetic powder particles coarse and cannot be mixed evenly, requiring a long time for ball milling

Method used

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  • 3 YSZ nano powder, preparation method and use thereof
  • 3 YSZ nano powder, preparation method and use thereof
  • 3 YSZ nano powder, preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Ingredients: Accurately weigh zirconia and yttrium oxide raw materials according to the stoichiometric ratio, and calculate based on a total mass of 1000 parts, of which 945 parts are zirconia and 55 parts are yttrium oxide;

[0028] (2) Stirring ball milling: place zirconia and yttrium oxide in a stirring ball mill, add deionized water and 0.30% by weight dispersant ammonium polyacrylate, adjust to a slurry with a solid content of 30% by weight, stir ball mill for 1 hour, and grind It is a zirconia ball with a particle size of 3mm;

[0029] (3) Sand milling: the slurry after stirring ball milling is introduced into the sand mill, and it is sanded at 800r / min for 6 hours. The grinding body is zirconia beads with a particle size of 0.7-0.8mm. The material is sanded once every 5 minutes;

[0030] (4) Drying: The sanded slurry is introduced into the spray drying equipment for spray drying to obtain the final powder with an average particle size of less than 80nm. The ...

Embodiment 2

[0032] (1) Ingredients: Accurately weigh zirconia and yttrium oxide raw materials according to the stoichiometric ratio, and calculate based on a total mass of 1000 parts, of which 945 parts are zirconia and 55 parts are yttrium oxide;

[0033] (2) Stirring ball milling: place zirconia and yttrium oxide in a stirring ball mill, add deionized water and 0.40% by weight dispersant sodium tripolyphosphate, adjust to a slurry with a solid content of 55% by weight, stir ball mill for 2 hours, and grind The body is a zirconia ball with a particle size of 3mm;

[0034] (3) Sand milling: the slurry after stirring ball milling is introduced into the sand mill, and it is sanded for 5 hours at 900r / min. The grinding body is zirconia beads with a particle size of 0.5-0.6mm. The material is sanded once every 6 minutes;

[0035] (4) Drying: The sanded slurry is introduced into the spray drying equipment for spray drying to obtain the final powder with an average particle size of less than 7...

Embodiment 3

[0037] (1) Ingredients: Accurately weigh zirconia and yttrium oxide raw materials according to the stoichiometric ratio, and calculate based on a total mass of 1000 parts, of which 945 parts are zirconia and 55 parts are yttrium oxide;

[0038] (2) Stirring ball milling: place zirconia and yttrium oxide in a stirring ball mill, add deionized water and 0.45% by weight dispersant PEG2000, adjust to a slurry with a solid content of 62.5% by weight, stir ball mill for 3 hours, and the grinding body is granular Zirconia balls with a diameter of 3mm;

[0039] (3) Sand milling: the slurry after stirring ball milling is introduced into the sand mill, and it is sanded for 4 hours at 950r / min. The grinding body is zirconia beads with a particle size of 0.3-0.4mm. The material is sanded once every 7 minutes;

[0040] (4) Drying: The sanded slurry is introduced into the spray drying equipment for spray drying to obtain the final powder with an average particle size of less than 60nm. The...

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Abstract

The invention provides a preparation method of 3 YSZ nano powder. The preparation method comprises the following steps: mixing zirconium oxide and yttrium oxide, adding deionized water and a dispersing agent to form a slurry, stirring and ball milling the slurry, then carrying out sand grinding and spray drying to prepare the nano 3 YSZ powder, wherein the particle size range is less than or equal to 80 nm; the average particle size is less than 50 nm. The process for preparing the powder by the sand grinding technology is simple and convenient, the period is short and the repeatability is good. The deionized water is used as the grinding medium, the problems of high cost and large environmental pollution in the traditional powder preparation process are well solved, and the preparation method can be widely applied to the preparation of high-temperature solid fuel cells, piezoelectric ceramic, oxygen sensors and ferroelectric ceramic.

Description

technical field [0001] The invention belongs to the field of material science, and in particular relates to a 3YSZ nanometer powder and its preparation method and application. Background technique [0002] Y 2 o 3 Stable ZrO 2 (YSZ) solid electrolyte has high oxygen ion conductivity, good mechanical properties, excellent oxidation resistance and corrosion resistance, and does not react with electrode materials, so it has become a high-temperature solid fuel cell, piezoelectric ceramics, and oxygen sensor. , ferroelectric ceramics and other main materials, and the ultrafine grain size, uniform particles and reasonable composition ratio of yttria stabilized zirconia powder are the key to obtain high ion conductivity and good mechanical strength YSZ solid electrolyte. Therefore, the preparation of nano-YSZ powder has always been a hot spot in the subject of nanomaterial preparation. [0003] At present, the methods for industrially preparing 3YSZ (ie, 3 moles of yttrium oxi...

Claims

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Application Information

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IPC IPC(8): C04B35/48C04B35/626C01G25/02H01M8/1253B82Y30/00
CPCC01G25/02C01P2002/72C01P2004/03C01P2004/64C04B35/48C04B35/6261C04B35/62655C04B2235/3225C04B2235/765H01M8/1253Y02E60/50
Inventor 宋希文包金小周芬谢敏郜健全安胜利张永和
Owner INNER MONGOLIA UNIV OF SCI & TECH
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