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Method for preparing wood-like hollow zirconia powder by water quenching method

A technology of zirconia powder and water quenching method, which is applied in the direction of zirconia to achieve the effect of simple operation, high efficiency and large specific surface area

Active Publication Date: 2017-04-26
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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And broken wood-like hollow zirconia powder, there is no report

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  • Method for preparing wood-like hollow zirconia powder by water quenching method
  • Method for preparing wood-like hollow zirconia powder by water quenching method

Examples

Experimental program
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Effect test

Embodiment 1

[0013] Using water quenching method, using zirconium oxychloride as raw material, heating to 800°C for 0.2 h, water quenching, the temperature of the water quenching solution is 10°C, the water quenching solution is sodium hydroxide solution, and the pH value of the sodium hydroxide solution is 8 , that is, the broken wood-like hollow zirconia powder is obtained.

Embodiment 2

[0015] Using water quenching method, using zirconium oxychloride as raw material, heating to 900°C for 0.5 h, water quenching, the temperature of the water quenching solution is 20°C, the water quenching solution is sodium hydroxide solution, and the pH value of the sodium hydroxide solution is 10 , that is, the broken wood-like hollow zirconia powder is obtained.

[0016] Through XRD test, it can be seen that the powder crystal type is monoclinic phase (see figure 1 ); Through the SEM test, it can be seen that the zirconia powder is in the shape of broken wood, with a diameter of 10-20 μm and a length of 50-200 μm. The interior is composed of loose nano-zirconia, the particle size of nano-zirconia is 20-50 nm, the pore diameter of the elongated hollow structure is 0.5-1 μm, and the wall thickness is 0.2-1 μm (see figure 2 ).

Embodiment 3

[0018] Using water quenching method, using zirconium oxychloride as raw material, heating to 1000 ° C for 1 h, water quenching, the temperature of the water quenching solution is 30 ° C, the water quenching solution is ammonia solution, the pH value of the ammonia solution is 9, and it is crushed Wood-like hollow zirconia powder.

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Abstract

The invention provides a method for preparing wood-like hollow zirconia powder by water quenching method, which belongs to the field of nanometer powder materials, and is characterized in that: water quenching method is adopted, zirconium oxychloride is used as raw material, and the method is heated to 800-1000°C Insulate for 0.2-1 h, water quenching, the temperature of the water quenching solution is 10-30°C, the water quenching solution is sodium hydroxide solution or ammonia solution, the pH value of the water quenching solution is 8-10, and the broken wood-like hollow zirconia is obtained Powder. The shape of the powder is wood-like, with a diameter of 10-20 μm and a length of 50-200 μm. The powder is formed by a long strip-shaped hollow structure, which is composed of nano-zirconia with dense surface and loose interior. , the particle size of nano zirconia is 20-50nm, the pore diameter of the elongated hollow structure is 0.5-1 μm, and the wall thickness is 0.2-1 μm. The invention has the advantages of simple process, safe operation, low calcining temperature and small particle size.

Description

technical field [0001] The invention provides a method for preparing wood-like hollow zirconia powder by a water quenching method, which belongs to the field of nanometer powder materials. Background technique [0002] Zirconium dioxide is an inorganic non-metallic material with high temperature resistance, wear resistance and corrosion resistance. In addition to being used in traditional refractory materials and ceramic pigments, it is also widely used in high-tech fields such as electronic ceramics, functional ceramics and structural ceramics. application. Different morphological structures, such as nanowires, nanorods, nanosheets, microsheets, and microrods, display different physical properties and have different applications in many fields. Spherical nanoparticles are conducive to improving the compactness of ceramics; nanowires are useful Improve the toughness of ceramics; flake particles are beneficial to improve toughness and thermal shock resistance; hollow structu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G25/02
Inventor 孟凡涛魏春城叶长收
Owner SHANDONG UNIV OF TECH