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Ceramic knife and preparation method thereof

A technology of ceramic knives and raw materials, which is applied in the field of new materials, can solve the problems that cannot meet the high demand of ceramic knives, and achieve the effect of light weight, high hardness and simple operation

Active Publication Date: 2014-12-17
宁波晶天新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the bending strength of the ceramic knife is only 1100MPa, which cannot meet people's increasing demand for ceramic knives.

Method used

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  • Ceramic knife and preparation method thereof
  • Ceramic knife and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Weigh raw materials: weigh raw materials according to the composition and mass percentage of the ceramic knife raw materials described in Table 1, Example 1, and pour the weighed raw materials into a ball mill for mixing for 60 min; wherein the Al 2 o 3 The particle size is 5μm, ZrO 2 The particle size of MgO is 0.5 μm, the particle size of MgO is 8 μm, and the particle size of TiO 2 The particle size is 0.1μm, ZrO 2 The stabilizer is Y 2 o 3 , Y 2 o 3 accounted for ZrO 2 The mass fraction of the product is 2%;

[0030] Compression forming: the above-mentioned ceramic knife raw material mixed uniformly is pressed into a ceramic knife blank under 55MPa by cold isostatic pressing;

[0031] Sintering: Put the ceramic knife blank into a vacuum sintering furnace, pre-fire it to 1100°C at a heating rate of 0.8°C / min, keep it at 110°C for 2 hours, and then heat it to 1500°C at a heating rate of 2.5°C / min. Keep the temperature at 1500°C for 3 hours, and finally cool in...

Embodiment 2

[0033]Weigh raw materials: weigh raw materials according to the composition and mass percentage of the ceramic knife raw materials described in Table 1, Example 2, and pour the weighed raw materials into a ball mill for mixing for 80 min; wherein the Al 2 o 3 The particle size is 7μm, ZrO 2 The particle size of MgO is 0.6 μm, the particle size of MgO is 10 μm, and the particle size of TiO 2 The particle size is 0.3μm, ZrO 2 The stabilizer is CeO 2 , CeO 2 accounted for ZrO 2 The quality fraction of the product is 3%;

[0034] Compression forming: the above-mentioned ceramic knife raw material mixed uniformly is pressed into a ceramic knife blank under 58 MPa by cold isostatic pressing;

[0035] Sintering: Put the ceramic knife blank into a vacuum sintering furnace, pre-sinter it to 1150°C at a heating rate of 0.6°C / min, keep it at 1150°C for 1 hour, and then heat it to 1550°C at a heating rate of 2°C / min. Keep the temperature at 1550°C for 3 hours, and finally cool in t...

Embodiment 3

[0037] Weigh raw materials: weigh raw materials according to the composition and mass percentage of the ceramic knife raw materials described in the embodiment 3 of table 1, pour the weighed raw materials into a ball mill and carry out mixing for 120min; wherein the Al 2 o 3 The particle size is 10μm, ZrO 2 The particle size of MgO is 0.8μm, the particle size of MgO is 15μm, and the particle size of TiO 2 The particle size is 0.5μm, ZrO 2 The stabilizer is Y 2 o 3 , Y 2 o 3 accounted for ZrO 2 The mass fraction of 4%;

[0038] Compression forming: the above-mentioned ceramic knife raw material mixed uniformly is pressed into a ceramic knife blank under 60 MPa by cold isostatic pressing;

[0039] Sintering: Put the ceramic knife blank into a vacuum sintering furnace, pre-fire it to 1000°C at a heating rate of 0.5°C / min, keep it at 1000°C for 2 hours, and then heat it to 1450°C at a heating rate of 1.5°C / min. Keep the temperature at 1450°C for 2 hours, and finally cool ...

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Abstract

The invention relates to a ceramic knife and a preparation method thereof, and belongsto the technical field of new materials. The ceramic knife comprises the following materials by weight percentage: 50-70% of Al2O3, 15-40% of ZrO2, and 5-20% of a sintering aid. The sintering aid is one or two selected from MgO and TiO2, the ZrO2 is stabilized by Y2O3 or CeO2, and mass fraction of Y2O3 or CeO2 in ZrO2 is 2-4%. The preparation method of the ceramic knife comprises the following steps: weighing the raw materials according to the mass percentage and mixing; compacting the raw materials into a ceramic knife blank; placing the ceramic knife blank into a vacuum furnace for sintering and insulating by segment; and finally cooling with the furnace to obtain the ceramic knife. The ceramic knife provided by the invention has reasonable compatibility of materials and is prepared from a specific energy-saving and environment-friendly method with easy operations; and the ceramic knife has the advantages of light weight, high precision, high hardness, high bending strength, high fracture toughness, wear resistance and chemical corrosion resistance.

Description

technical field [0001] The invention relates to a ceramic knife, in particular to a ceramic knife and a preparation method thereof, belonging to the technical field of new materials. Background technique [0002] With the continuous improvement of the overall quality of life of urban people, various types of ceramic products are widely used in all aspects of life. For example, the sharpness of ceramic knives is dozens of times higher than that of common steel knives, and its oxidation resistance is quite good. Compared with other knife products, its stability is also very high, so it is often used in home kitchens. Traditional metal knives have countless capillary pores on the surface. When cooking ingredients, soup will remain in the capillary pores, and metal elements will oxidize and rust, forming peculiar smell or metallic taste; while ceramic knives are non-toxic, non-polluting, and non-toxic. Oxidation, no rust, corrosion resistance of various acids and alkalis and ot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/622C04B35/10
Inventor 郭天力
Owner 宁波晶天新材料有限公司
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