High-hardness antibacterial ceramic cutter material and preparation method thereof

Abstract

The invention discloses a high-hardness antibacterial ceramic cutter material which is prepared from the following raw materials in parts by weight: 25-35 parts of nano AlN, 25-35 parts of nano silicon carbide, 15-25 parts of nano chitin, 1-3 parts of Gy2O3, 3-4 parts of LaO, 5-8 parts of sodium fluoride, 3-4 parts of Y2O3, 1-3 parts of aluminum oxide, 3-4 parts of kaolin, 2.1-3.1 parts of titanium oxide, a proper amount of deionized water, 0.8-1.3 parts of tung oil, 1.3-1.6 parts of polyethylene glycol, a proper amount of ethylene glycol and 3.8-5 parts of a performance optimizing agent. The ceramic material disclosed by the invention has extremely high hardness, wear resistance and antibacterial property, is excellent in comprehensive performance, can be used as a kitchen knife material or an industrial cutter material, and is high in cost performance; by using the nano chitin, the antibacterial property and toughness of the ceramic material are enhanced; by using the performance optimizing agent provided by the invention, the surface smoothness and the comprehensive performance of the ceramic are further improved.

Description

Technical Field

[0001] The present invention relates to the field of ceramic cutting tool materials, and particularly to a high-hardness antibacterial ceramic tool material and a preparation method thereof. Background Art

[0002] Ceramic tools are a new type of material tool. Due to their high hardness, they can process some super-hard materials that cannot be processed by ordinary blades, which are a supplement to existing various tools and play a very important role in the machinery manufacturing industry. In addition, ceramics can also be made into kitchen knives, which have the advantages of oxidation resistance, corrosion resistance, high sharpness, and good chemical stability. However, at present, ceramic cutting materials still have problems such as high cost, insufficient toughness, high brittleness, and lack of antibacterial properties, which need to be solved. Summary of the Invention

[0003] The purpose of the present invention is to provide a high-hardness antibacterial ceramic tool material and a preparation method thereof. This ceramic has extremely high hardness, good toughness and wear resistance, and can cut high-hardness metal materials; it has good antibacterial properties and can be made into kitchen knives.

[0004] The technical solution of the present invention is as follows: A high-hardness antibacterial ceramic tool material, which is characterized by being made of the following raw materials in parts by weight: nano-AlN 25-35, nano-silicon carbide 25-35, nano-chitin 15-25, Gy2O3 1-3, LaO 3-4, sodium fluoride 5-8, Y2O3 3-4, alumina 1-3, kaolin 3-4, titanium oxide 2.1-3.1, appropriate amount of deionized water, tung oil 0.8-1.3, polyethylene glycol 1.3-1.6, appropriate amount of ethylene glycol, performance optimizer 3.8-5; The performance optimizer is made of the following raw materials in parts by weight: carbon nanotubes 0.5-0.6, zinc oxide 1.5-1.8, nano-NiO 1.4-1.7, CoO 0.4-0.5, zirconium boride 0.4-0.6, polyvinyl alcohol 5-8, tungsten diselenide 5-8, nano-silica 3-4, nano-potassium feldspar 0.4-0.8, vinyl acetate 5-8, sodium dichromate 0.3-0.5, poly(p-phenylene benzobisoxazole) fiber 1.1-1.4, deionized water 8-10, methyl methacrylate 0.3-0.4; the preparation method is: add vinyl acetate and methyl methacrylate to deionized water, stir evenly, then add nano-potassium feldspar, zirconium boride, polyvinyl alcohol, nano-silica, CoO, sodium dichromate, heat to 90-100 °C, stir and react for 30-40 minutes, then add other remaining components, stir for 20-30 minutes, ultrasonically disperse for 10-12 minutes, filter, dry, mechanically crush, pass through a 100-mesh sieve, and then under a vacuum atmosphere, keep warm at 1250-1350 °C for 10-20 minutes, mechanically crush, pass through a 100-mesh sieve to obtain.

[0005] The preparation method of the high-hardness antibacterial ceramic tool material is characterized by comprising the following steps: S1 Mix Gy2O3, LaO, sodium fluoride, Y2O3, kaolin, and alumina by mechanical alloying, and pass through a 300-mesh sieve to obtain mixed powder 1; S2 Mix nano-AlN, nano-silicon carbide, nano-chitin, and titanium oxide, and grind for 20 - 30 minutes to obtain mixed powder 2; S3 Mix the mixed powder 1 and the mixed powder 2 obtained in S1 and S2, add 15 - 22% by weight of deionized water and 3 - 5% by weight of ethylene glycol, mix into a mud shape, perform mechanical alloying for 1 - 2 hours, dry, then send it into a heat treatment furnace, keep it at 800 - 900 °C for 3 - 4 hours, take it out and mechanically crush it, and pass through a 300-mesh sieve to obtain mixed powder 3; S4 Mix the mixed powder 3 obtained in S3 with the other remaining components except tung oil and polyethylene glycol, take 1 - 2 times the weight of the mixed material of deionized water, add tung oil and polyethylene glycol, stir evenly, add the mixed material, perform mechanical alloying for 1 - 2 hours, dry at 80 - 100 °C, pass through a 100-mesh sieve, and hot press at 1450 - 1550 °C, with a hot press pressure of 80 - 90 MPa and a pressure holding time of 10 - 20 minutes to obtain the product.

[0006] Advantages of the present invention The ceramic of the present invention has extremely high hardness, good toughness and wear resistance, and can cut high-hardness metal materials; it has good antibacterial properties and can be used to make kitchen knives; by using the performance optimizer of the present invention, the surface smoothness and comprehensive performance of the ceramic are further improved. Embodiment

[0007] A high-hardness antibacterial ceramic tool material is made from the following raw materials in parts by weight (kg): 25 parts of nano-AlN, 26 parts of nano-silicon carbide, 20 parts of nano-chitin, 3 parts of Gy2O3, 3 parts of LaO, 6 parts of sodium fluoride, 3 parts of Y2O3, 1 part of alumina, 3 parts of kaolin, 3 parts of titanium oxide, appropriate amount of deionized water, 1 part of tung oil, 1.3 parts of polyethylene glycol, appropriate amount of ethylene glycol, and 4.7 parts of performance optimizer; the performance optimizer is made from the following raw materials in parts by weight: 0.5 part of carbon nanotube, 1.5 parts of zinc oxide, 1.4 parts of nano-NiO, 0.4 part of CoO, 0.4 part of zirconium boride, 6 parts of polyvinyl alcohol, 6 parts of tungsten diselenide, 3.5 parts of nano-silica, 0.5 part of nano-potassium feldspar, 6 parts of vinyl acetate, 0.4 part of sodium dichromate, 1.2 parts of poly(p-phenylene benzobisoxazole) fiber, 9 parts of deionized water, and 0.3 part of methyl methacrylate; the preparation method is as follows: add vinyl acetate and methyl methacrylate into deionized water, stir evenly, then add nano-potassium feldspar, zirconium boride, polyvinyl alcohol, nano-silica, CoO, and sodium dichromate, heat to 95°C, stir and react for 35 minutes, then add other remaining components, stir for 25 minutes, perform ultrasonic dispersion for 11 minutes, filter, dry, mechanically crush, pass through a 100-mesh sieve, then under a vacuum atmosphere, keep warm at 1300°C for 15 minutes, mechanically crush, and pass through a 100-mesh sieve to obtain the product.

[0008] The preparation method of the high-hardness antibacterial ceramic tool material includes the following steps: S1 Mix Gy2O3, LaO, sodium fluoride, Y2O3, kaolin, and alumina by mechanical alloying, and pass through a 300-mesh sieve to obtain mixed powder 1; S2 Mix nano-AlN, nano-silicon carbide, nano-chitin, and titanium oxide, and grind for 25 minutes to obtain mixed powder 2; S3 Mix the mixed powder 1 and the mixed powder 2 obtained in S1 and S2, add 20% by weight of deionized water and 4% by weight of ethylene glycol, mix into a mud shape, perform mechanical alloying for 1 hour, dry, send it into a heat treatment furnace, keep warm at 850°C for 3 hours, take it out, mechanically crush, and pass through a 300-mesh sieve to obtain mixed powder 3; S4 Mix the mixed powder 3 obtained in S3 with other remaining components except tung oil and polyethylene glycol, take 1 times the weight of the mixed material of deionized water, add tung oil and polyethylene glycol, stir evenly, add the mixed material, perform mechanical alloying for 1 hour, dry at 90°C, pass through a 100-mesh sieve, perform hot pressing at 1500°C, the hot pressing pressure is 85 MPa, and the pressure holding time is 10 minutes to obtain the product.

[0009] Experimental data: The Vickers hardness of the ceramic in this example is 90.1 GPa, the flexural strength is 1588 MPa, and the fracture toughness is 15.7 MPa·m 1 / 2, the antibacterial rates against Escherichia coli, Pseudomonas aeruginosa, Bacillus pumilus, Salmonella typhimurium, Staphylococcus, Acinetobacter calcoaceticus, etc. all exceed 98.7%.

Claims

1. A high-hardness antibacterial ceramic cutting tool material, characterized in that It is made from the following raw materials in parts by weight: 25 - 35 parts of nano - AlN, 25 - 35 parts of nano - silicon carbide, 15 - 25 parts of nano - chitin, 1 - 3 parts of Gy2O3, 3 - 4 parts of LaO, 5 - 8 parts of sodium fluoride, 3 - 4 parts of Y2O3, 1 - 3 parts of alumina, 3 - 4 parts of kaolin, 2.1 - 3.1 parts of titanium oxide, appropriate amount of deionized water, 0.8 - 1.3 parts of tung oil, 1.3 - 1.6 parts of polyethylene glycol, appropriate amount of ethylene glycol, 3.8 - 5 parts of performance optimizer; the performance optimizer is made from the following raw materials in parts by weight: 0.5 - 0.6 parts of carbon nanotubes, 1.5 - 1.8 parts of zinc oxide, 1.4 - 1.7 parts of nano - NiO, 0.4 - 0.5 parts of CoO, 0.4 - 0.6 parts of zirconium boride, 5 - 8 parts of polyvinyl alcohol, 5 - 8 parts of tungsten diselenide, 3 - 4 parts of nano - silicon dioxide, 0.4 - 0.8 parts of nano - potassium feldspar, 5 - 8 parts of vinyl acetate, 0.3 - 0.5 parts of sodium dichromate, 1.1 - 1.4 parts of poly - p - phenylene benzobisoxazole fiber, 8 - 10 parts of deionized water, 0.3 - 0.4 parts of methyl methacrylate; the preparation method is as follows: add vinyl acetate and methyl methacrylate into deionized water, stir evenly, then add nano - potassium feldspar, zirconium boride, polyvinyl alcohol, nano - silicon dioxide, CoO, sodium dichromate, heat to 90 - 100 °C, stir and react for 30 - 40 minutes, then add other remaining components, stir for 20 - 30 minutes, ultrasonically disperse for 10 - 12 minutes, filter, dry, mechanically crush, pass through a 100 - mesh sieve, then under a vacuum atmosphere, keep warm at 1250 - 1350 °C for 10 - 20 minutes, mechanically crush, pass through a 100 - mesh sieve to obtain it.

2. The preparation method of the high-hardness antibacterial ceramic tool material according to claim 1, characterized in that It includes the following steps: S1 Mix Gy2O3, LaO, sodium fluoride, Y2O3, kaolin, and alumina by mechanical alloying, pass through a 300 - mesh sieve to obtain mixed powder 1; S2 Mix nano - AlN, nano - silicon carbide, nano - chitin, and titanium oxide, grind for 20 - 30 minutes to obtain mixed powder 2; S3 Mix the mixed powder 1 and mixed powder 2 obtained from S1 and S2, add 15 - 22% by weight of deionized water and 3 - 5% by weight of ethylene glycol, mix into a mud - like state, perform mechanical alloying for 1 - 2 hours, after drying, send it into a heat treatment furnace, keep warm at 800 - 900 °C for 3 - 4 hours, take it out, mechanically crush, pass through a 300 - mesh sieve to obtain mixed powder 3; S4 Mix the mixed powder 3 obtained from S3 with other remaining components except tung oil and polyethylene glycol, take 1 - 2 times the weight of the mixed material of deionized water, add tung oil and polyethylene glycol, stir evenly, add the mixed material, perform mechanical alloying for 1 - 2 hours, dry at 80 - 100 °C, pass through a 100 - mesh sieve, hot - press at 1450 - 1550 °C, the hot - press pressure is 80 - 90 MPa, and the pressure - holding time is 10 - 20 minutes to obtain it.