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Nano ceramic cutter and preparation method thereof

A technology of nano-ceramics and knives, which is applied in the field of nano-ceramic knives and its preparation. It can solve the problems of deformation, affecting the toughness and strength of knives, and uneven dispersion of components, so as to achieve high sintering activity, enhanced thermal shock resistance, and component dispersion. uniform effect

Active Publication Date: 2014-12-10
YAAN YUANCHUANG CERAMIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] At present, most of the production of zirconia ceramic knives is to mix zirconia, yttrium oxide and other additives for ball milling and granulation. Since the components are mechanically mixed, the components in the material are unevenly dispersed, and the prepared knives will be calcined at high temperature. Deformation, which seriously affects the toughness and strength of the tool

Method used

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  • Nano ceramic cutter and preparation method thereof
  • Nano ceramic cutter and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) with ZrOCl 2 ·8H 2 O, Y 2 o 3 Add the third component as the raw material at the same time to form a mixed aqueous solution, and the Zr in the mixed solution 4+ The concentration is 0.8mol / L, and the oxide contents of each component combined are: zirconia 80wt%, yttrium oxide 8wt%, alumina 6wt%, magnesium oxide 3wt%, calcium oxide 3wt%;

[0034] (2) Add a precipitant to the mixed solution under stirring to form a hydroxide precipitate, and the added precipitant is an organic base ethylenediamine.

[0035] (3) The obtained hydroxide is subjected to microwave hydrothermal decomposition reaction to generate oxides. The microwave hydrothermal decomposition reaction generates oxides in a special reaction kettle, and the microwave hydrothermal temperature is 180°C.

[0036] (4) Ball mill and stir the nano-oxide generated by hydrothermal treatment, and the milling time is 5 hours;

[0037] (5) Wash the nanopowder after ball milling;

[0038] (6) Add appropriate amoun...

Embodiment 2

[0046] (1) with ZrOCl 2 ·8H 2 O, Y 2 o 3 Add the third component as the raw material at the same time to form a mixed aqueous solution, and the Zr in the mixed solution 4+ The concentration is 2mol / L, combined with its oxide content are: zirconia 95wt%, yttrium oxide 2wt%, magnesium oxide 1wt%, iron oxide 0.5wt%, cerium oxide 1.5wt%.

[0047] (2) Add a precipitant to the mixed solution under stirring to form a hydroxide precipitate, and the added precipitant is inorganic alkali sodium hydroxide.

[0048] (3) The obtained hydroxide is subjected to microwave hydrothermal decomposition reaction to generate oxides. The microwave hydrothermal decomposition reaction generates oxides in a special reaction kettle, and the microwave hydrothermal temperature is 200°C.

[0049] (4) Ball mill and stir the nano-oxide generated by hydrothermal treatment, and the milling time is 6 hours;

[0050] (5) Wash the nanopowder after ball milling;

[0051] (6) Add appropriate amount of distill...

Embodiment 3

[0059] In Example 2, the third component containing titanium oxide was added so that the content of titanium oxide was 0.2wt%, and the content of cerium oxide was 1.3wt%, and the test was carried out without changing the others.

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Abstract

The invention relates to a nano ceramic cutter and a preparation method thereof. The composition of the nano ceramic cutter can be yttrium oxide stabilized zirconium oxide including synergic doping of one or more third components among aluminum oxide, magnesium oxide, calcium oxide and titanium oxide; and the nano ceramic cutter specifically comprises the following components: 80-95wt% of zirconium oxide, 2-8wt% of yttrium oxide, 0-20wt% of aluminum oxide, 0-5wt% of magnesium oxide, 0-4wt% of calcium oxide, 0-0.5wt% of titanium oxide and 0-2wt% of other rare-earth oxides. After the green body of the nano ceramic cutter prepared through the method is calcined at 1300-1350 DEG C, the theoretical density is up to 99.7%; the nano ceramic cutter is high in bending strength and favorable in fracture toughness; and the process is simple and easy to realize large-scale production.

Description

[0001] The present invention requests the priority of the Chinese invention patent application submitted by the applicant to the State Intellectual Property Office of China on September 29, 2013. The entire content of the above application is incorporated herein by reference. technical field [0002] The invention relates to a nano-ceramic cutter and a preparation method thereof, and belongs to the technical field of zirconia fine ceramic materials. Background technique [0003] Zirconia composite ceramics are new structural ceramics developed in the 1970s. Because it has very excellent physical and chemical properties, especially adding a small amount of yttrium oxide, calcium oxide, magnesium oxide, aluminum oxide and other rare earth oxides as stabilizers to stabilize ZrO 2 Tetragonal, ZrO 2 Composite ceramics have attracted widespread attention because of their high room temperature flexural strength and fracture toughness. They have not only become a research hotspot ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/488C04B35/49C04B35/622
Inventor 罗忠义王恩远
Owner YAAN YUANCHUANG CERAMIC
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