JP3135641U - Antibacterial colored zirconia ceramic products - Google Patents

Abstract

Disclosed is an antibacterial colored zirconia ceramic product having a structure in which a coloring effect which exhibits a green color by adding and sintering an inorganic copper salt compound solution containing copper ions and an antibacterial performance due to contained copper oxide coexist.
SOLUTION: The finished product 1 is a solution obtained by dissolving an inorganic copper salt compound crystal powder in water or alcohol and added to a zirconia powder to make a copper ion-containing zirconia powder. It is formed into an intermediate product in the shape, and the intermediate product is sintered in an atmospheric furnace to have a colored and antibacterial property containing copper oxide. The finished product 1 is a knife, scissors, cutter, knife, knife, razor Manual blades such as hand tools or electric blades, tableware such as tableware, containers, spoons and forks, and medical supplies such as various containers, tweezers and forceps.
[Selection] Figure 1

Description

  The present invention relates to an antibacterial colored zirconia ceramic product, and more specifically, a surface coexisting with a coloring effect that exhibits a green color by adding an inorganic copper salt compound solution containing copper ions and an antibacterial performance due to the contained copper oxide. The present invention relates to an antibacterial colored zirconia ceramic product having a structure with a coating.

  In recent years, zirconia ceramic has been widely used for manual knifes for food cooking such as knives, kitchen knives, and jars in general households, but zirconia ceramic, which is originally a fine ceramic, has no antibacterial properties, Since the white appearance is common sense, there is a great demand for colorization of the white zirconia ceramic.

Furthermore, in recent years, antibacterial properties are imparted to zirconia ceramics by a method in which a solution containing photocatalyst TiO ₂ is baked and coated on the surface of the zirconia ceramic product. The baked coating on the surface is scraped off and the effect is questioned, and it is desired to keep the zirconia ceramic structure itself antibacterial, but what was developed by adding antibacterial performance to the zirconia ceramic structure itself was There is nothing.

Conventionally, zirconia ceramic products are basically white, and various coloring methods have been disclosed. For example, Y ₂ having a suitable blade shape and a material content of _{2 to} 5 mol% is available. The part of the blade body that is partially stabilized with O ₃ , which is a white or gray pigment ZrO ₂ , across the back side of the wavy or linear boundary set at the required position between the blade edge and the back. The surface layer portion is replaced with a surface oxide layer composed of at least one of black or blackish gray Fe ₂ O ₃ , Cr ₂ O ₃ , TiO ₂ or a diffusion layer in which the oxide diffuses into the blade body, and At least two kinds of grains composed of a zirconia knife (see Patent Document 1) that forms a diffusion layer at the boundary between the blade body and the substituted layer, and ceramic powder, a binder, and chromogenic particles. The product is shaped, subjected to a binder removal step and sintered. In this case, the granular material is composed of different chromogenic particles and / or different concentrations of the same chromogenic particles, and has a distinctly colored region of the ceramic product (see Patent Document 2), and zirconia and Group 4 in the periodic table. A method for producing a zirconia sintered body and a method for producing the same, comprising firing an inclusion of an element (excluding zirconium) with an oxide in a hydrogen-containing atmosphere, a nitrogen-containing atmosphere or a water-containing atmosphere Zirconia sintered body obtained by the above (see Patent Document 3), zirconia in which a first phase mainly composed of tetragonal zirconia and at least a second phase composed of alumina particles containing at least ceria as a stabilizer is dispersed. This is a composite ceramic sintered body. As a coloring component element, an element containing at least one element selected from elements belonging to Groups 6 and 8 to 10 in the periodic table in the second phase is disclosed (see Patent Document 4).
Japanese Patent Laid-Open No. 60-60979 JP-A-8-81255 Japanese Patent Laid-Open No. 2003-212552 JP 2004-59374 A

  However, although the above-mentioned known patent documents describe the coloring technique, there is no consideration for antibacterial properties, and when using zirconia ceramics for food cooking knives, knives, scissors, cutters, etc. Although it is often awarded for its abrasion resistance due to hardness, it is naturally useful to develop effective means for obtaining hygienic performance such as antibacterial properties as long as food is cooked. The present invention aims to solve the technical problems by adopting a structure that imparts antibacterial performance to the surface film of the zirconia sintered body.

  The antibacterial colored zirconia ceramic product of the present invention has been prepared by adding a solution obtained by dissolving inorganic copper salt compound crystal powder in water or alcohol to the zirconia powder, as a result of diligent research, in view of the above-mentioned problems. The copper ion-containing zirconia powder is formed into an intermediate product of the desired product shape, and the intermediate product is sintered in an atmospheric furnace to form a colored and antibacterial surface film containing copper oxide. Further, the finished product is a manual knife such as a knife, scissors, cutter, knife, knife, razor, or electric knife, and the finished product is a tableware, container, In addition to tableware such as spoons and forks, the finished product is used as medical supplies such as various containers, tweezers and forceps.

  The antibacterial colored zirconia ceramic product of the present invention is a finished product, in which a solution obtained by dissolving an inorganic copper salt compound crystal powder in water or alcohol is added to and mixed with zirconia powder to obtain a copper ion-containing zirconia powder. The zirconia-containing powder is formed into an intermediate product of the desired product shape, and the intermediate product is sintered in an atmospheric furnace to form a structure with a colored and antibacterial surface film that contains copper oxide. In addition, the antibacterial effect of copper ions can be obtained at the same time, which is an extremely innovative and highly practical device.

  Hereinafter, the antibacterial colored zirconia ceramic product of the present invention will be described in detail using an embodiment. FIG. 1 is a side view of a kitchen knife, which is a manual knife of the embodiment of the antibacterial colored zirconia ceramic product of the present invention. FIG. 2 is a plan view of a spoon which is a tableware of an embodiment of the antibacterial colored zirconia ceramic product of the present invention, and FIG. 3 is a side view of tweezers which is a medical product of the embodiment of the antibacterial colored zirconia ceramic product of the present invention. FIG. 4 is a cross-sectional explanatory view of an embodiment of the antibacterial colored zirconia ceramic product of the present invention.

  The present invention relates to an antibacterial colored zirconia ceramic product, and more specifically, a structure in which a green coloration effect and an antibacterial performance due to contained copper oxide coexist by adding and sintering an inorganic copper salt compound solution containing copper ions. In the antibacterial colored zirconia ceramic product, the finished product 1 is obtained by adding and mixing a solution obtained by dissolving an inorganic copper salt compound crystal powder in water or alcohol to a zirconia powder to obtain a copper ion-containing zirconia powder, The copper ion-containing zirconia powder is formed into an intermediate product having a desired product shape, and the intermediate product is sintered in an atmospheric furnace to form a structure having a colored and antibacterial surface coating 1a containing copper oxide. It is characterized by.

  Furthermore, the antibacterial colored zirconia ceramic product according to claim 2 is the antibacterial colored zirconia ceramic product according to claim 1, wherein the finished product 1 is a manual such as a knife, scissors, cutter, knife, scalpel, razor blade, etc. It is characterized by being a blade or an electric blade.

  Furthermore, the antibacterial colored zirconia ceramic product according to claim 3 is the antibacterial colored zirconia ceramic product according to claim 1, wherein the finished product 1 is a tableware such as tableware, a container, a spoon, and a fork. It is characterized by.

  In addition, the antibacterial colored zirconia ceramic product according to claim 4 is the antibacterial colored zirconia ceramic product according to claim 1, wherein the finished product 1 is used as medical supplies such as various containers, tweezers and forceps. It is characterized by.

  That is, in order to form the antibacterial colored zirconia ceramic product of the present invention, first, a predetermined amount of inorganic copper containing copper ions that easily dissolve in water or a solvent of alcohol in a predetermined amount of water or a predetermined amount of alcohol. A salt compound crystal powder is dissolved to form a solution.

  Then, a predetermined amount of the solution is added and mixed evenly with a predetermined amount of zirconia powder to obtain a copper ion-containing zirconia powder.

  Next, the said copper ion containing zirconia powder is shape | molded by the desired desired product shape using press molding or injection molding, slurry solidification molding, etc., and it is set as an intermediate product.

  Next, the intermediate product is heated and sintered in an atmospheric furnace at a temperature of 1,500 ° C. or lower to obtain a finished product 1 which is a sintered body. The finished product 1 has an antibacterial green color containing copper oxide. The structure is provided with a surface coating 1a.

  Further, if necessary, the finished product 1 is ground and polished to be finished as a final product with an antibacterial colored zirconia ceramic product containing copper oxide.

  As an example for producing the antibacterial colored zirconia ceramic product of the present invention, first, copper nitrate trihydrate crystal powder (copper ion content 25%) which is an inorganic copper salt compound crystal powder in 100 cc of water as a solvent. ) Was added and dissolved in 1 g (A), 5 g (B), and 10 g (C).

  Next, after adding the above three dissolved solutions to zirconia powder and 5 g of each dissolved solution to 100 g of each, the mixture was mixed and dried, and then press-molded to form three rectangular plate-shaped products (A), (B), and (C). The three molded products (A), (B), and (C) are sintered in an atmospheric furnace at 1,450 ° C. to obtain three finished products 1 (A), (B), and (C) of zirconia ceramic. Formed.

  Next, copper ions contained in the powders of the three finished products 1 (A), (B), and (C) that were sintered are uniformly dispersed inside the zirconia ceramic as inorganic copper oxide by sintering in an atmospheric furnace. The finished product 1 (A) (B) (C) of the sintered body of copper oxide-containing green zirconia ceramic was obtained, and each antibacterial activity test and color difference comparison test were conducted. A zirconia ceramic (D) is simultaneously formed under the same conditions.

  And in the antibacterial activity test evaluation by the Japan Food Analysis Center, in the E. coli test results, as a result, the three finished products 1 (A) (B) (C) all showed good results compared to the additive-free ceramic pieces (D). In particular, (B) and (C) are <10 (the number of viable bacteria is not recognized), and also in (A), the number of remaining viable bacteria is reduced by about 10,000 minutes and the antibacterial qualification conditions for the antibacterial activity test Antibacterial activity far below (unprocessed product comparison value 1/100 remaining viable count) is confirmed, and the finished product 1 with the antibacterial surface film 1a colored with copper oxide of the present invention has a strong antibacterial effect It has been proved to have

  Next, when the color difference value measurement evaluation by the Saitama Industrial Technology Center is made the additive value (D) Δ value reference value 0.00, the three finished products 1 (A), (B), and (C) are approximately proportional. Since the color density is rising and the desired color tone can be obtained, it can be controlled by adjusting the amount of copper oxide by changing the concentration of the inorganic copper salt compound crystal powder in the solution, so that the desired color tone can be easily obtained. .

  The antibacterial colored zirconia ceramic product of the present invention can be used in the fields of manual or electric knifes for household use or business use, tableware, and medical supplies, and has a structure having a surface film colored antibacterial and green. Zirconia ceramic products can be provided.

  FIG. 1 is a side view of a kitchen knife, which is a manual knife of an embodiment of the antibacterial colored zirconia ceramic product of the present invention.   FIG. 2 is a plan view of a spoon as a tableware of an embodiment of the antibacterial colored zirconia ceramic product of the present invention.   FIG. 3 is a side view of tweezers which is a medical product of an embodiment of the antibacterial colored zirconia ceramic product of the present invention.   FIG. 4 is a cross-sectional explanatory view of an embodiment of the antibacterial colored zirconia ceramic product of the present invention.

Explanation of symbols

1 Finished product 1a Surface coating

Claims (4)

  The finished product is a solution in which inorganic copper salt compound crystal powder is dissolved in water or alcohol, added to zirconia powder and mixed to make copper ion-containing zirconia powder, and the copper ion-containing zirconia powder is an intermediate product of a desired product shape An antibacterial colored zirconia ceramic product characterized in that the intermediate product is sintered in an atmospheric furnace to form a copper oxide-containing colored and antibacterial structure.     2. The antibacterial colored zirconia ceramic product according to claim 1, wherein the finished product is a manual knife such as a knife, a knife, a cutter, a knife, a knife, a razor blade, or an electric knife.   The antibacterial colored zirconia ceramic product according to claim 1, wherein the finished product is a tableware such as tableware, a container, a spoon, and a fork.   2. The antibacterial colored zirconia ceramic product according to claim 1, wherein the finished product is a medical product such as various containers, tweezers, forceps and the like.

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