Preparation method of microcrystalline zirconium nano ceramic material

A nano-ceramic and micro-crystalline technology, which is applied in the field of preparation of micro-crystalline zirconium nano-ceramic materials, can solve problems such as limited application areas, toughness, and poor strength, and achieve low thermal expansion coefficient, good insulation performance, and broad application prospects.

Inactive Publication Date: 2016-08-03
张静
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention: Aiming at the current ceramic materials which play a pivotal role in daily life and industrial production, but the traditional ceramic materials are brittle in texture, poor in toughness and strength, which greatly limit the defects in the field of use, and provide A preparation method of a microcrystalline zirconium nano-ceramic material is proposed. In this method, zirconium oxychloride is used as a raw material to prepare nano-zirconia, and then through gel titration, magnesium oxide is used as a crystal nucleating agent to obtain microcrystalline zirconia, supplemented by Silica, etc., through plasma sintering to finally produce microcrystalline zirconium nano-ceramic materials

Method used

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Examples

Experimental program
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Effect test

example 1

[0019] Weigh 100g of zirconium oxychloride and 10g of yttrium nitrate into a 1L beaker, then add 500mL of absolute ethanol to the beaker, stir evenly with a magnetic stirrer, filter to remove impurities, collect the filtrate, and pass the obtained filtrate through the dropping funnel to 5mL Drop it into the ammonia water ethanol solution with a concentration of 0.5mol / L at a rate of 0.5mol / L, place it in an ultrasonic oscillator and oscillate with a power of 100W to react overnight; Wash 3 times with deionized water, dry in an oven at 105°C for 7 hours, put the dried precipitate in a muffle furnace, and calcinate at 400°C for 2 hours to obtain nano-zirconia powder; weigh 50 g of the above-prepared nano-zirconia Put zirconium powder and 400mL nitric acid solution with a concentration of 0.3mol / L into a three-necked flask equipped with a stirrer, a thermometer and a dropping funnel, then move the flask into a water bath, heat up to 75°C, and start the stirrer at 200r / min During ...

example 2

[0022] Weigh 150g of zirconium oxychloride and 15g of yttrium nitrate into a 1L beaker, then add 550mL of absolute ethanol to the beaker, stir evenly with a magnetic stirrer, filter to remove impurities, collect the filtrate, and pass the obtained filtrate through the dropping funnel to 8mL Drop it into the ammonia water ethanol solution with a concentration of 0.5mol / L at a rate of / min, place it in an ultrasonic oscillator and oscillate with a power of 150W to react overnight; Wash 4 times with ionized water, dry in an oven at 108°C for 7 hours, and finally put the dried precipitate in a muffle furnace and calcinate at 450°C for 2 hours to obtain nano-zirconia powder; weigh 80g of the above-prepared nano-zirconia Put zirconium powder and 450mL nitric acid solution with a concentration of 0.3mol / L into a three-necked flask equipped with a stirrer, a thermometer and a dropping funnel, then move the flask into a water bath, heat up to 80°C, start the stirrer at 250r / min During ...

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Abstract

The invention relates to a preparation method of a microcrystalline zirconium nano-ceramic material, which belongs to the field of ceramic preparation. This method uses zirconium oxychloride as raw material to prepare nano-zirconia, and then through gel titration, magnesium oxide is used as crystal nucleating agent to obtain microcrystalline zirconia, supplemented with silicon dioxide, etc., and finally microcrystalline is obtained by plasma sintering. Zirconium nano ceramic material. The microcrystalline zirconium nano ceramic material prepared by the present invention also has high thermal conductivity and extremely low coefficient of thermal expansion, no water absorption, good insulation performance, compact and uniform structure, excellent properties such as impact resistance, wear resistance and corrosion resistance, and has wide applications. prospect.

Description

technical field [0001] The invention relates to a preparation method of a microcrystalline zirconium nano-ceramic material, which belongs to the field of ceramic preparation. Background technique [0002] As one of the three pillars of materials, ceramic materials play a pivotal role in daily life and industrial production. However, due to the brittle texture, poor toughness and strength of traditional ceramic materials, its application has been greatly restricted. With the wide application of nanotechnology, nano-ceramics will be produced. Brittleness, which makes ceramics flexible and machinable like metals. The so-called nano-ceramic refers to the ceramic material whose phase in the microstructure has a nanoscale scale, that is to say, the grain size, grain boundary width, second phase distribution, defect size, etc. are all at the nanoscale level. Because the interface occupies a volume percentage comparable to that of particles, the small size effect and the disorder ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/14C04B35/48C04B35/622C04B35/626
CPCC04B35/14C04B35/48C04B35/622C04B35/626C04B2235/3201C04B2235/3208C04B2235/3217
Inventor 张静林大伟
Owner 张静
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