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Zirconia nano ceramic material

A technology of nano-ceramics and zirconia, which is applied in the field of zirconia nano-ceramic materials, can solve the problems of restricting the development and application of nano-ceramics, increasing material costs, and rapid progress, and achieves fine grain size, promotion of densification process, and preparation process simple effect

Inactive Publication Date: 2011-06-15
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these techniques increase the cost of materials and have various limitations, and the volumes of prepared samples are generally small
Conventional cold press forming and pressureless sintering processes, which have the most commercial value, have not progressed as fast as expected in this field, which greatly restricts the development and application of nano-ceramics

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Add 50gZrOCl 2 ·8H 2 O, 1.8gCu(NO 3 ) 3 ·9H 2 O and 3.3gY(NO 3 ) 3 ·6H 2 Dissolve O in 150ml of distilled water, stir to completely dissolve the salt until the solution is transparent, then add 1ml of 0.8M polyethylene glycol-2000 solution. In addition, use distilled water to prepare a 0.1M aqueous ammonia solution, and slowly add the above two solutions dropwise to 500ml of ammonia water with a pH of 10 while stirring vigorously. When the reaction is complete, the pH of the system remains basically unchanged. Get a mixed colloid. Let the precipitate stand for 12 hours, then wash it five times with distilled water to remove CL - , NO 3 - Plasma impurity ions, and then washed twice with absolute ethanol to remove water, eliminate the bridging oxygen bond formed by water molecules between the colloidal particles, and avoid the formation of hard agglomeration of powder during the calcination process. Finally, calcined at 600℃ for 2 hours to obtain ZrO 2 (3Y) Nanocomposite p...

Embodiment 2

[0013] Add 50gZrOCl 2 ·8H 2 O, 1.8gCu(NO 3 ) 3 ·9H 2 O and 3.3gY(NO 3 ) 3 ·6H 2 Dissolve O in 150ml of distilled water, stir to completely dissolve the salt until the solution is transparent, then add 1ml of 0.8M polyethylene glycol-2000 solution. In addition, use distilled water to prepare a 0.1M aqueous ammonia solution, and slowly add the above two solutions dropwise to 500ml of ammonia water with a pH of 10 while stirring vigorously. When the reaction is complete, the pH of the system remains basically unchanged. Get a mixed colloid. Let the precipitate stand for 12 hours, then wash it five times with distilled water to remove CL - , NO 3 - Plasma impurity ions, and then wash twice with absolute ethanol to remove water, eliminate the bridging oxygen bond formed by water molecules between the colloidal particles, and avoid the formation of hard agglomeration of powder during the calcination process. Finally, calcined at 600℃ for 2 hours to obtain ZrO 2 (3Y) Nanocomposite pow...

Embodiment 3

[0015] Add 50gZrOCl 2 ·8H 2 O, 1.2gCu(NO 3 ) 3 ·9H 2 O and 3.3gY(NO 3 ) 3 ·6H 2 Dissolve O in 150ml of distilled water, stir to completely dissolve the salt until the solution is transparent, then add 1ml of 0.8M polyethylene glycol-2000 solution. In addition, use distilled water to prepare a 0.1M aqueous ammonia solution, and slowly add the above two solutions dropwise to 500ml of ammonia water with a pH of 10 while stirring vigorously. When the reaction is complete, the pH of the system remains basically unchanged. Get a mixed colloid. Let the precipitate stand for 12 hours, then wash it five times with distilled water to remove CL - , NO 3 - Plasma impurity ions, and then wash twice with absolute ethanol to remove water, eliminate the bridging oxygen bond formed by water molecules between the colloidal particles, and avoid the formation of hard agglomeration of powder during the calcination process. Finally, calcined at 550℃ for 2 hours to obtain ZrO 2 (3Y) Nano composite po...

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Abstract

The invention discloses a zirconia nano ceramic material simply prepared by conventional low-temperature sintering. The material can be sintered and densified without pressure at the temperature of lower than 1,000 DEG C, and has a two-phase composite structure consisting of a single oblique phase and a square phase; and the grain sizes of the two phases are less than 100 nanometers. The material has the characteristics of simple preparation process, small sintered grains and high compactness.

Description

Technical field [0001] The invention relates to a zirconia nano ceramic material which can be prepared by simple and conventional low-temperature sintering. Background technique [0002] In the past two decades, nanomaterials have attracted widespread attention due to their extraordinary mechanical, electrical, optical and magnetic properties. Nanoceramics is a branch of nanomaterials, and its grain size, grain boundary width, second phase distribution, defect size, etc. are all on the nanometer level. Yttria stabilized tetragonal zirconia (Y-TZP) nano-ceramic materials have excellent room temperature strength and fracture toughness, and are one of the nano-ceramic materials with great application prospects. The superplastic zirconia nano-ceramics will be able to use the existing metal processing and molding technology to forge and press to produce precision parts, making it possible for ceramic materials to replace metal materials on a large scale. However, only when the mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/488C04B35/64
Inventor 张永胜齐亚娥胡丽天
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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