Electron-generating material and electron-generating member

Abstract

To provide an electron-generating material and electron-generating member, which can reduce a friction coefficient.SOLUTION: An electron-generating material capable of reducing a friction coefficient is provided, the material comprising powder of a natural mineral containing a radioactive substance and powder of an electron-generating material that generates electrons when subjected to alpha rays emitted from the natural mineral, where the powder of the electron-generating material comprises titanium dioxide powder, lanthanum hexaboride, and silicon metal.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to an electron-generating material and an electron-generating member. [Background technology]

[0002] Conventionally, attempts have been made in various fields of machinery to reduce frictional resistance for the purposes of improving fuel economy, preventing noise, improving workability, etc. For example, the use of lubricating oils or bearings has been used to reduce frictional resistance in rotating members, etc., thereby improving fuel economy and quietness. Summary of the Invention [Problem to be solved by the invention]

[0003] Conventionally known means for reducing frictional resistance have been shown to have a certain degree of excellent effect, but it is believed that there is a limit to how far these conventional means can achieve a further reduction in frictional resistance, and therefore the development of new means for reducing frictional resistance is desired.

[0004] The present invention has been made to solve such problems, and an object of the present invention is to provide an electron generating material and an electron generating member that can reduce the coefficient of friction. [Means for solving the problem]

[0005] The above-mentioned object of the present invention can be achieved by providing a powder of a natural mineral containing a radioactive substance and a powder of an electron-generating substance that generates electrons by alpha rays emitted from the natural mineral, wherein the powder of the electron-generating substance is made of titanium dioxide powder and an electron-generating material that can reduce the coefficient of friction and contains lanthanum hexaboride and metallic silicon.

[0006] Furthermore, with regard to the electron-generating material, it is preferable that the powder of the natural mineral has an average particle size of 200 μm or less, and the powder of the electron-generating substance has an average particle size of 200 μm or less.

[0007] It is also preferable that the adhesive layer further comprises a fluid binder having electrical conductivity. The fluid binder may be either non-drying or drying.

[0008] The fluid binder preferably contains at least one powder selected from the group consisting of zinc, molybdenum disulfide, and copper.

[0009] The above-mentioned object of the present invention is also achieved by an electron generating member capable of reducing the coefficient of friction, which comprises: an electron generating unit including a powder of a natural mineral containing a radioactive substance and a powder of an electron generating material that generates electrons by alpha rays emitted from the natural mineral; and an electrode unit connected to the electron generating unit, wherein the powder of the electron generating material includes titanium dioxide powder, lanthanum hexaboride, and metallic silicon.

[0010] Furthermore, with regard to this electron generating member, it is preferable that the powder of the natural mineral has an average particle size of 200 μm or less, and the powder of the electron generating substance has an average particle size of 200 μm or less. [Effects of the Invention]

[0011] According to the present invention, it is possible to provide an electron generating material and an electron generating member that can reduce the coefficient of friction. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a cross-sectional view showing a schematic configuration of an electron generating member according to an embodiment of the present invention. [Figure 2] 1. FIG. 4 is a schematic cross-sectional view of a modified example of the electron generating member shown in FIG. [Figure 3] FIG. 4 is a cross-sectional view showing a schematic configuration of an electron generating member according to another embodiment of the present invention. [Figure 4] 4 is a schematic plan view of the configuration as seen from the direction of the arrow A in FIG. 3. [Figure 5] FIG. 2 is an explanatory diagram for explaining magnetic field lines of a cylindrical magnet body. [Figure 6]4 is a schematic cross-sectional view of a modified example of the electron generating member shown in FIG. 3. FIG. [Figure 7] FIG. 1 is an explanatory diagram for explaining the configuration of a sample used in a verification test. [Figure 8] FIG. 1 is an explanatory diagram for explaining the configuration of a sample used in a verification test. [Figure 9] This is an image of the verification test result document. [Figure 10] This is an image of the verification test result document. DETAILED DESCRIPTION OF THE INVENTION

[0013] An electron-generating material according to one embodiment of the present invention will be described below. It should be noted that the present invention is not limited to the following embodiment, and can be practiced with appropriate modifications within the scope of the object of the present invention. The electron-generating material according to the present invention is a material capable of generating electrons, and is composed of a powder of a natural mineral containing a radioactive substance and a powder of an electron-generating material that generates electrons by alpha rays emitted from the natural mineral. It goes without saying that the powder of the natural mineral and the powder of the electron-generating material are uniformly mixed.

[0014] Natural minerals containing radioactive substances are not particularly limited, and examples thereof include radium ore, beitouite, Bad Gastein ore, monazite, phosphate rock, columbite, tantalite, strobelite, pyrochlore, bastnaesite, cerium concentrate, zircon, gumstone, davidite, brannerite, uraninite (pitchblende), ningyoite, uraninite, carnotite, tsjamunite, metachamunite, chayamunite, schrekingelite, zirkelite, xenotime, trogomite, oerite, bakhanite, kaltenite, tungstite, botrylite, brockite, uranophene, gentianite, coffinite, uranium thorite, uranium botrylite, thorite, and fransevilleite.

[0015] Furthermore, as an electron generating material that generates electrons by alpha rays emitted from natural minerals, for example, titanium dioxide (TiO2) powder can be used.

[0016] The smaller the average particle size of the powder of natural mineral contained in the electron-generating material according to the present invention, the greater the effect. For example, it is preferably set to 200 μm or less, more preferably set to 100 μm or less, and even more preferably set to 10 μm or less. Similarly, the smaller the average particle size of the powder of electron-generating substance, the greater the effect. For example, it is preferably set to 200 μm or less, more preferably set to 100 μm or less, and even more preferably set to 10 μm or less.

[0017] Furthermore, with regard to the electron-generating material according to the present invention, the lower limit of the content of the natural ore is not particularly limited, as long as it can generate a sufficient amount of alpha rays to generate electrons. The lower limit of the content of the natural ore is preferably 0.01 parts by mass or more, more preferably 0.1 parts by mass or more, and particularly preferably 1 part by mass or more, per 100 parts by mass of the electron-generating material. The upper limit of the content of the natural ore is not particularly limited, as long as it can reduce the radiation dose generated to 0.2 μSv / h or less. The upper limit of the content of the natural ore is preferably 90 parts by mass or less, more preferably 85 parts by mass or less, and particularly preferably 80 parts by mass or less, per 100 parts by mass of the electron-generating material.

[0018] Furthermore, with regard to the electron generating material, the content of the electron generating substance that generates electrons in response to alpha rays emitted from natural minerals is preferably set to a content that maximizes the ionization effect of alpha rays. In particular, the content of titanium dioxide contained in the electron generating material of the present invention is preferably set to, for example, 1 part by mass or more and 15 parts by mass or less per 100 parts by mass of the electron generating material. Furthermore, the electron generating material of the present invention may be configured to contain, in addition to titanium dioxide powder, at least one powder selected from lanthanum hexaboride (LaB6), black silica, tungsten, metallic silicon, molybdenum disulfide, metallic germanium, gallium nitride (GaN), tourmaline, boron, and boron compounds as the electron generating substance. Here, the content of lanthanum hexaboride is preferably set to 0.5 parts by mass or more and 5 parts by mass or less per 100 parts by mass of the electron generating material. Furthermore, the content of black silica is preferably set to 1 part by mass or more and 5 parts by mass or less per 100 parts by mass of the electron generating material. The tungsten content is preferably set to 0.1 parts by mass or more and 0.5 parts by mass or less per 100 parts by mass of the electron generating material, the metallic silicon content is preferably set to 2 parts by mass or more and 5 parts by mass or less per 100 parts by mass of the electron generating material, the molybdenum disulfide content is preferably set to 2 parts by mass or more and 5 parts by mass or less per 100 parts by mass of the electron generating material, and the metallic germanium content is preferably set to 2 parts by mass or more and 5 parts by mass or less per 100 parts by mass of the electron generating material, the gallium nitride (GaN) content is preferably set to 0.8 parts by mass or more and 2 parts by mass or less per 100 parts by mass of the electron generating material, and the tourmaline content is preferably set to 2 parts by mass or more and 10 parts by mass or less per 100 parts by mass of the electron generating material. The content of boron is preferably set to 0.8 parts by mass or more and 2 parts by mass or less relative to 100 parts by mass of the electron-generating material, and the content of the boron compound is preferably set to 0.8 parts by mass or more and 2 parts by mass or less relative to 100 parts by mass of the electron-generating material. An example of the boron compound is disodium octaborate tetrahydrate.

[0019] Furthermore, the electron generating material may be configured to contain metallic magnesium powder in addition to titanium dioxide powder. The average particle diameter of the metallic magnesium powder is preferably set to 0.3 mm to 1.5 mm, and more preferably set to 0.5 mm to 1.0 mm. The content of the metallic magnesium powder is preferably set to 1 part by mass to 35 parts by mass per 100 parts by mass of the electron generating material, and particularly preferably set to 5 parts by mass to 30 parts by mass per 100 parts by mass of the electron generating material. As described above, by setting the average particle diameter of the metallic magnesium powder to be significantly larger than the average particle diameter of the electron generating material powder, a significantly larger amount of natural mineral powder comes into contact with each magnesium metal powder, enabling the emission of even greater amounts of electrons.

[0020] The electron generating material may be configured to contain copper powder in addition to titanium dioxide powder. The copper powder is preferably formed in a flake shape. The average particle size of the copper powder is preferably 50 μm or less, more preferably 20 μm or less. Since copper powder has high conductivity, it can be efficiently propagated to the outside. The content of the copper powder is preferably set to 1 part by mass or more and 4 parts by mass or less per 100 parts by mass of the electron generating material.

[0021] The electron-generating material may also include, in addition to titanium dioxide powder, a powder of copper powder with silver plating on its surface (silver-plated copper powder). The silver-plated copper powder is preferably formed in a flake shape. The average particle diameter of the silver-plated copper powder is preferably 50 μm or less, more preferably 20 μm or less. The silver-plated copper powder also emits electrons due to the bonding of dissimilar metals, silver and copper, further increasing the amount of emitted electrons. Furthermore, the silver-plated copper powder has excellent conductivity, allowing electrons generated within the electron-generating material to be efficiently propagated to the outside. The content of the silver-plated copper powder is preferably set to 5 to 20 parts by mass, and more preferably 8 to 14 parts by mass, per 100 parts by mass of the electron-generating material.

[0022] The electron-generating material may be configured to contain silver powder in addition to titanium dioxide powder. The silver powder is preferably formed in a flake shape. The average particle size of the silver powder is preferably 50 μm or less, more preferably 20 μm or less. Since silver powder has excellent conductivity, it is possible to efficiently propagate electrons generated inside the electron-generating material to the outside. The content of the silver powder is preferably set to 8 parts by mass or more and 12 parts by mass or less per 100 parts by mass of the electron-generating material.

[0023] The electron generating material according to the present invention may further comprise a powder of a conductive carbon material such as graphite. The average particle size of the carbon material powder is preferably 10 μm or less, more preferably 1 μm or less. The content of the carbon material powder is preferably set to 1 part by mass or more and 5 parts by mass or less per 100 parts by mass of the electron generating material. By further comprising such a powder of a conductive carbon material, the conductivity is further improved, allowing electrons to be efficiently propagated to the outside.

[0024] Furthermore, with regard to the electron generating material according to the present invention, it is preferable to further mix a conductive fluid binder. Such a fluid binder is configured to include, for example, a powder of a metal material and a solvent. This fluid binder may be a dry type that dries naturally, or a non-drying type that does not dry naturally. When the fluid binder is configured as a dry type, for example, a solvent that volatilizes upon natural drying is used. When the fluid binder is configured as a non-drying type, for example, a non-drying oil such as non-drying grease or a mineral oil can be used as the solvent. Note that the average particle diameter of the powder of the metal material contained in the fluid binder is preferably 200 μm or less.

[0025] By mixing a fluid binder to form the electron-generating material, the powder of the natural ore and the powder of the electron-generating substance contained in the electron-generating material can be maintained in a uniformly dispersed state. Furthermore, when a dry fluid binder is used, for example, the electron-generating material having fluidity is poured into a predetermined mold and then dried, causing the solvent contained in the fluid binder to volatilize, thereby enabling the electron-generating material to be molded and solidified into a desired shape. Furthermore, when a non-drying fluid binder is used, the electron-generating material can be configured to have fluidity.

[0026] Here, the conductive metal material contained in the flowable binder is preferably at least one selected from zinc, molybdenum disulfide, and copper. Furthermore, a suitable example of a flowable binder containing zinc powder is a cold-temperature plating paint containing zinc. This cold-temperature plating paint is suitable for molding and solidifying an electron-generating material into a desired shape because the solvent contained in the paint evaporates at room temperature, and the zinc solidifies after evaporation. Furthermore, zinc is also a substance that generates electrons in response to alpha rays emitted from natural minerals. Therefore, when an electron-generating material is molded and solidified, electrons are generated from the electron-generating material and zinc in response to alpha rays emitted from natural minerals, resulting in an increased amount of emitted electrons. Furthermore, because zinc is conductive, electrons generated inside the electron-generating material can be efficiently propagated to the outside of the electron-generating material.

[0027] Furthermore, a suitable example of a fluid binder containing molybdenum disulfide powder is molybdenum disulfide grease. This molybdenum disulfide grease is a mixture of non-drying grease and molybdenum disulfide powder, so the electron-generating material maintains its fluidity without drying naturally. Such electron-generating materials containing molybdenum disulfide grease as a fluid binder can be used, for example, by attaching them to the tip of a screw fastener that is to be attached or detached. Molybdenum disulfide is also a substance that generates electrons using alpha rays emitted from natural minerals. Copper grease, which is a mixture of non-drying grease and copper powder, can also be used.

[0028] Furthermore, with respect to the electron-generating material, the content of the fluid binder is preferably, for example, 50 parts by mass or more and 80 parts by mass or less per 100 parts by mass of the electron-generating material. When a dry fluid binder is used, the content is not particularly limited to the above numerical range, as long as it can maintain the shape when the solvent evaporates and the material dries, for example, the shape of the dried state when a fluid electron-generating material is applied and dried, or the shape of the electron-generating material when the fluid electron-generating material is poured into a predetermined mold and then dried to form a desired shape. When a non-drying fluid binder is used, the content is not particularly limited to the above numerical range, as long as the electron-generating material has fluidity.

[0029] Furthermore, with regard to the fluid binder, the higher the concentration of the metal material powder, the better. When a dry fluid binder is used, the content may be such that the shape obtained when the solvent evaporates and the binder is dried, for example, the shape obtained when a fluid electron-generating material is applied and dried, or the shape obtained when the fluid electron-generating material is poured into a predetermined mold and then dried to form a desired shape, can be maintained. When a non-drying fluid binder is used, the content is not particularly limited as long as the electron-generating material has fluidity.

[0030] Next, an electron generating member 1 according to the present invention will be described with reference to the accompanying drawings. Note that the present invention is not limited to the following embodiments and can be implemented with appropriate modifications within the scope of the object of the present invention. Also, each drawing is partially enlarged or reduced in size to facilitate understanding of the configuration. The electron generating member 1 according to the present invention is a member constructed using the above-mentioned electron generating material, and includes, for example, an electron generating section 2 and an electrode section 3, as shown in the schematic cross-sectional view of FIG. 1.

[0031] The electron generating unit 2 is configured to include powder of natural minerals containing radioactive materials, and powder of electron generating material that generates electrons by alpha rays emitted from the natural minerals.

[0032] As with the above, examples of natural minerals containing radioactive substances include radium ore, beitouite, Bad Gastein ore, monazite, phosphate rock, columbite, tantalite, strobelite, pyrochlore, bastnaesite, cerium concentrate, zircon, gumstone, davidite, brannerite, uraninite (pitchblende), ningyoite, uraninite, carnotite, tsjamunite, metachamunite, chayamunite, schrekingelite, zirkelite, xenotime, trogomite, oerite, bakhanite, kaltenite, tungstite, botrylite, brockite, uranophene, gentianite, coffinite, uranium thorite, uranium botrylite, thorite, and fransevilleite.

[0033] Furthermore, examples of electron generating materials that generate electrons by alpha rays emitted from natural minerals include, as described above, a mixture of titanium dioxide (TiO2) powder and at least one powder selected from lanthanum hexaboride (LaB6), black silica, metallic magnesium, copper, silver-plated copper, silver, tungsten, metallic silicon, molybdenum disulfide, metallic germanium, gallium nitride (GaN), tourmaline, boron, and boron compounds.

[0034] The average particle size of the powder of the natural mineral is, for example, preferably 200 μm or less, more preferably 100 μm or less, and even more preferably 10 μm or less. The average particle size of the powder of the electron-generating material is, for example, preferably 200 μm or less, more preferably 100 μm or less, and even more preferably 10 μm or less.

[0035] The electron generating part 2 can be formed, for example, by mixing a powder of a natural mineral containing radioactive material and a powder of an electron generating material that is emitted from the natural mineral and generates electrons by alpha rays with a conductive fluid binder and stirring the mixture uniformly to form a fluid electron generating material, then applying this fluid electron generating material to a sheet-like electrode part 3 in a predetermined thickness to form the electron generating part 2, and then stacking another sheet-like electrode part 3 on top of it and drying it.

[0036] A suitable example of the fluid binder is a cold-plate coating material containing zinc. In this cold-plate coating material, the solvent contained in the coating material volatilizes at room temperature, and the zinc solidifies after volatilization, allowing the electron generating material to be molded into a desired shape and solidified.

[0037] Here, the electrode unit 3 is a member that is electrically connected to the electron supply target, and the material thereof is not particularly limited as long as it can propagate the electrons generated in the electron generating unit 2 to the electron supply target. However, it is preferable to use a material with high electrical conductivity, such as copper, silver, or gold, and it is more preferable to use copper from the viewpoint of cost.

[0038] Here, the configuration of the electron generating member 1 shown in FIG. 1 is a sheet-like electron generating member 1 having a single-layer electron generating portion 2, but is not limited to this configuration. As shown in the schematic cross-sectional view of the configuration in FIG. 2, the electron generating member 1 may be configured as a multi-layer type electron generating member 1 in which sheet-like electron generating portions 2 and sheet-like electrode portions 3 are alternately stacked. Furthermore, although the electron-generating member 1 shown in FIG. 1 has a sheet-like configuration, the configuration is not particularly limited to this. It goes without saying that the electron-generating member 1 can be configured in various shapes (for example, a cylindrical shape, a rectangular column shape, a bolt shape, a box shape, a curved shape, etc.) by pouring a fluid electron-generating material into a predetermined mold and then drying it to dry out the solvent contained in the fluid binder.

[0039] Alternatively, the electron generating member 1 may be configured such that the above-described electron generating material is filled inside a cylindrical magnet body 4 to form the electron generating section 2, and the electrode section 3 is connected to the magnet body 4, as shown in FIG. 3, which is a schematic cross-sectional view of the configuration, and FIG. 4, which is a plan view seen from the direction of arrow A in FIG. 3.

[0040] The magnet body 4 is configured as a cylindrical magnet body 4 with a north pole at one end and a south pole at the other end. The electrode unit 3 is not particularly limited as long as it is configured to connect to the magnet body 4, but it is preferable that the electrode be connected to one end on the north pole side of the cylindrical magnet body 4. It is particularly preferable that the electrode be configured as a plate electrode that connects the entire end face of the one end on the north pole side of the cylindrical magnet body 4 and closes the opening on that end side of the cylindrical magnet body 4, as shown in FIGS. 3 and 4 . It is more preferable that the plate electrode be formed to have an area larger than the area enclosed by the outer circumferential outline of one end of the cylindrical magnet body 4.

[0041] Here, the electron-generating material filled inside the cylindrical magnet body 4 may comprise only powder of a natural mineral containing a radioactive substance and powder of an electron-generating material that generates electrons by alpha rays emitted from the natural mineral, or may further contain a conductive fluid binder. The fluid binder may be either dry or non-drying.

[0042] In this way, the electron generating member 1 formed by filling the inside of the cylindrical magnet body 4 with an electron generating material can efficiently propagate electrons because the direction of movement of electrons generated in the electron generating material can be controlled by the influence of the magnetic force of the magnet body 4. Specifically, since the magnetic field lines of the magnet body 4 exit from the north pole side and enter the south pole side as shown in Fig. 5, when the electron generating member 1 is placed so that the electrode portion 3 on the north pole side of the magnet body 4 abuts against an object to which electrons are supplied, the electrons are influenced by the magnetic field and move in a direction perpendicular to the magnetic field lines exiting from the north pole side, allowing electrons to be propagated efficiently and widely in the surface direction of the object to which electrons are supplied.

[0043] 3 and 4, it is preferable to employ a plate electrode that is connected to the entire end face of one end, which is the north pole side of the magnet body 4, from the viewpoint of efficiently propagating electrons generated in the electron generating unit 2 to the electron supply target. Furthermore, by forming the plate electrode so that it has an area larger than the area enclosed by the outer circumferential outline of one end of the cylindrical magnet body 4, electrons can be propagated more widely and efficiently to the electron supply target via the plate electrode.

[0044] As shown in the schematic cross-sectional view of FIG. 6, the magnet body 4 may be configured to include an insulating member 5 that covers the side surface and the other end. The material for forming the insulating member 5 is not particularly limited, and any commonly known insulating material may be used. The insulating member 5 may be removable, such as a rubber cap, or may be made by fixing the surface of the magnet body 4 with an insulating resin material so that it cannot be removed. By including such an insulating member 5, it is possible to effectively prevent electrons generated in the electron generating unit 2 from being emitted outside the electron generating member 1 and effectively propagate the generated electrons toward the target.

[0045] The inventors conducted verification tests to confirm the effects of the electron generating member according to the present invention, which are described below. The electron generating member samples used in the verification tests will be described. A total of nine samples were prepared. Three of the nine samples were of the same type (hereinafter referred to as samples A-1, A-2, and A-3), while the other three samples (hereinafter referred to as samples B-1, B-2, and B-3) had different configurations from samples A-1 to A-3. Furthermore, the other three samples (hereinafter referred to as samples C-1, C-2, and C-3) had different configurations from samples A-1 to A-3 and B-1 to B-3.

[0046] First, as shown in Fig. 7, Samples A-1 to A-3 have a rectangular parallelepiped shape with a thickness of 2 mm and dimensions of 25 mm x 25 mm. The electron generating members of Samples A-1 to A-3 are formed by mixing powder of radium ore (natural ore), powder of electron generating material, and a room-temperature plating solution containing zinc (a conductive metal binder; a room-temperature plating paint containing 96% by weight of zinc) and thoroughly stirring the mixture. The mixture is then poured into a mold, dried, and removed from the mold. The removed electron generating material (electron generating portion 2) is then coated with copper foil with a thickness of 0.02 mm. The coated copper foil functions as an electrode portion. The content of radium ore (natural ore) was 2 parts by mass per 100 parts by mass of the electron generating material, the content of the electron generating substance was 22.3 parts by mass per 100 parts by mass of the electron generating material, and the content of the fluid binder was 75.7 parts by mass per 100 parts by mass of the electron generating material. A powder mixture of titanium dioxide, metallic magnesium, metallic silicon, black silica, lanthanum hexaboride, and copper was used as the electron generating material. The content of titanium dioxide powder was 8 parts by mass per 100 parts by mass of the electron generating material, the content of metallic magnesium powder was 7.3 parts by mass per 100 parts by mass of the electron generating material, the content of metallic silicon was 3 parts by mass per 100 parts by mass of the electron generating material, and the content of black silica was 2 parts by mass per 100 parts by mass of the electron generating material. The content of lanthanum hexaboride was 0.5 parts by mass per 100 parts by mass of the electron generating material. The copper powder content is 1.5 parts by mass per 100 parts by mass of the electron generating material. The radium ore (natural ore) used has a maximum particle size of 13 μm or less, and the black silica has a maximum particle size of 1 μm or less. The lanthanum hexaboride used has a maximum particle size of 1 μm or less, and the copper has a maximum particle size of 43 μm or less. The average particle size of the titanium dioxide is 0.1 μm, the average particle size of the metallic magnesium is 1 mm, and the average particle size of the metallic silicon is 0.1 μm.

[0047] Next, the electron generating members (electron generating materials) of Samples B-1 to B-3 are configured as a fluid paste and are formed by thoroughly mixing and stirring powdered radium ore (natural ore), powdered electron generating material, and a metal binder. As with Samples A-1 to A-3, the content of radium ore (natural ore) was 2 parts by mass per 100 parts by mass of the electron generating material, the content of the electron generating material was 22.3 parts by mass per 100 parts by mass of the electron generating material, and the content of the metal binder was 75.7 parts by mass per 100 parts by mass of the electron generating material. For Samples B-1 to B-3, molybdenum disulfide grease Grade A No. 240 manufactured by Maruyama Molybdenum Co., Ltd. was used as the metal binder. The content of each material constituting the electron generating material was the same as that of Samples A-1 to A-3.

[0048] Samples C-1 to C-3 have the configuration shown in Fig. 8. That is, the inside of a cylindrical magnet body 4 is filled with an electron generating material, and the magnet body 4 is configured to have electrode portions 3, 3 that close the openings at both ends. The cylindrical magnet body 4 (cylindrical neodymium magnet) has an outer diameter of 25 mm, an inner diameter of 19 mm, and a height of 5 mm. The electrode portion 3 is made of SUS430 plate material with a thickness of 0.5 mm. The electron-generating material filled inside the cylindrical magnet body 4 was the same as that in Samples A-1 to A-3. It was formed by mixing powdered radium ore (natural ore), powdered electron-generating material, and a cold plating solution containing zinc (a conductive metal binder; a cold plating coating containing 96% by weight of zinc) and thoroughly stirring the mixture. The mixture was then poured into the cylindrical magnet body 4 and dried. The radium ore (natural ore) content was 2 parts by mass per 100 parts by mass of the electron-generating material, the electron-generating material content was 22.3 parts by mass per 100 parts by mass of the electron-generating material, and the fluid binder content was 75.7 parts by mass per 100 parts by mass of the electron-generating material. The electron-generating material used was a powder mixture of titanium dioxide, metallic magnesium, metallic silicon, black silica, lanthanum hexaboride, and copper. The titanium dioxide powder content was 8 parts by mass per 100 parts by mass of the electron generating material, the metallic magnesium powder content was 7.3 parts by mass per 100 parts by mass of the electron generating material, the metallic silicon content was 3 parts by mass per 100 parts by mass of the electron generating material, and the black silica content was 2 parts by mass per 100 parts by mass of the electron generating material. The lanthanum hexaboride content was 0.5 parts by mass per 100 parts by mass of the electron generating material. The copper powder content was 1.5 parts by mass per 100 parts by mass of the electron generating material.

[0049] We commissioned the Hiroshima Prefectural Technology Research Institute to measure the coefficients of friction of the electron generating members for Samples A-1 to A-3, B-1 to B-3, and C-1 to C-3. As described in the "Test Results (Notification)" shown in Figures 9 and 10, the test was conducted in accordance with JIS K7125:1999 "Test Method for the Coefficient of Friction of Plastic Films and Sheets," using a Shimadzu AG-X plus 10kN tester to measure the static and dynamic coefficients of friction between a test specimen (aluminum: 42mm x 42mm x 42mm cubic test specimen) and paper. To minimize the effect of van der Waals forces, the test specimen was slid against paper (copy paper; Nippon Paper Trading Co., Ltd.: PPC7070) with a finely textured surface. Here, the LePTON POWER TIPS (A-1 to A-3) listed in the "Notice Regarding Test Results" correspond to the above samples A-1 to A-3, the POWER CONDUCTOR GREASE (B-1 to B-3) corresponds to the above samples B-1 to B-3, and the ring magnet type (C-1 to C-3) corresponds to the above samples C-1 to C-3.

[0050] For each of these nine samples, tests were conducted to determine whether the static and dynamic coefficients of friction changed before and after attachment or application to the specimen. Measurements of each sample after attachment or application were conducted six hours after attachment or application. Measurements of the static and dynamic coefficients of friction were conducted three times, and the average values ​​are listed in the "Test Results (Notification)" associated with Figures 9 and 10. Prior to the friction coefficient measurements at Hiroshima Prefectural Technology Research Institute, the inventors of the present invention conducted a cloud chamber experiment to confirm that the electron-generating member (electron-generating material) according to the present invention generates electrons.

[0051] As shown in the "Test Results (Notice)" related to Figures 9 and 10, for Samples A-1 to A-3 (LePTON POWER TIPS (A-1 to A-3)), the static friction coefficients before installation were 0.33 for Sample A-1, 0.31 for Sample A-2, and 0.31 for Sample A-3, whereas after installation, these values ​​changed to 0.31 for Sample A-1, 0.29 for Sample A-2, and 0.29 for Sample A-3. In other words, the static friction coefficients after installation decreased by 6.1% for Sample A-1, 6.5% for Sample A-2, and 6.5% for Sample A-3 compared to the static friction coefficients before installation.

[0052] Furthermore, the dynamic friction coefficient before installation was 0.31 for Sample A-1, 0.27 for Sample A-2, and 0.29 for Sample A-3, whereas after installation it changed to 0.23 for Sample A-1, 0.23 for Sample A-2, and 0.23 for Sample A-3. This indicates that the dynamic friction coefficient after installation was reduced by 25.8% for Sample A-1, 14.8% for Sample A-2, and 20.7% for Sample A-3 compared to the dynamic friction coefficient before installation.

[0053] Furthermore, in the "Test Results (Notification)" of Figures 9 and 10, it can be seen that for Samples B-1 to B-3 (POWER CONDUCTOR GREASE (B-1 to B-3)), which are configured in a paste form, the static friction coefficients before application were 0.29 for Sample B-1, 0.37 for Sample B-2, and 0.25 for Sample B-3, whereas after installation, these values ​​changed to 0.29 for Sample B-1, 0.31 for Sample B-2, and 0.23 for Sample B-3. In other words, it can be seen that the static friction coefficients after application were unchanged for Sample B-1, 16.2% lower for Sample B-2, and 8.0% lower for Sample B-3 compared to the static friction coefficients before application.

[0054] Furthermore, the dynamic friction coefficients before application were 0.28 for sample B-1, 0.34 for sample B-2, and 0.24 for sample B-3, whereas after application they changed to 0.25 for sample B-1, 0.23 for sample B-2, and 0.22 for sample B-3. This indicates that the dynamic friction coefficients after application were reduced by 10.7% for sample B-1, 32.4% for sample B-2, and 8.3% for sample B-3 compared to the values ​​of the dynamic friction coefficients before application.

[0055] Furthermore, in the "Test Results (Notification)" in Figures 9 and 10, it can be seen that for Samples C-1 to C-3 (ring magnet types (C-1 to C-3)), the static friction coefficients before installation were 0.30 for Sample C-1, 0.30 for Sample C-2, and 0.29 for Sample C-3, whereas after installation these values ​​changed to 0.23 for Sample C-1, 0.25 for Sample C-2, and 0.25 for Sample C-3. In other words, it can be seen that the static friction coefficients after installation were reduced by 23.3% for Sample C-1, 16.7% for Sample C-2, and 13.8% for Sample C-3 compared to the static friction coefficient values ​​before installation.

[0056] Furthermore, the dynamic friction coefficient before installation was 0.26 for sample C-1, 0.26 for sample C-2, and 0.24 for sample C-3, whereas after installation it changed to 0.21 for sample C-1, 0.23 for sample C-2, and 0.21 for sample C-3. This indicates that the dynamic friction coefficient after installation was reduced by 19.2% for sample C-1, 11.5% for sample C-2, and 12.5% ​​for sample C-3 compared to the dynamic friction coefficient before installation.

[0057] From the above, it can be seen that the use of the electron generating member according to the present invention significantly reduces the coefficient of static friction and the coefficient of kinetic friction. For example, by attaching the electron generating member according to the present invention to a milling machine that uses a rotating blade to cut metals, the electrons emitted from the electron generating member propagate to the milling machine's blade, reducing the coefficient of friction between the blade and the workpiece. As a result, the vibration of the rotating blade is reduced, improving machining accuracy and quieting the machine's operating noise. Furthermore, by propagating the electrons emitted from the electron generating member to a motor, the coefficient of friction at the contact points of rotating parts inside the motor is reduced, thereby extending the motor's life and improving its efficiency. [Explanation of symbols]

[0058] 1. Electron generating material 2. Electron generator 3 Electrode part 4. Magnet body 5. Insulating material

Claims

1. The device comprises a powder of a natural mineral containing a radioactive material, and a powder of an electron generating material that generates electrons by alpha rays emitted from the natural mineral, The electron-generating material powder is an electron-generating material that can reduce the coefficient of friction, and includes titanium dioxide powder, lanthanum hexaboride, and metallic silicon.

2. The average particle size of the natural mineral powder is 200 μm or less, 2. The electron generating material according to claim 1, wherein the powder of the electron generating substance has an average particle size of 200 μm or less.

3. The electron generating material according to claim 1 or 2, further comprising a fluid binder having electrical conductivity.

4. 4. The electron generating material of claim 3, wherein the fluid binder is non-drying.

5. 4. The electron generating material of claim 3, wherein the flowable binder is dry.

6. 6. The electron generating material according to claim 5, wherein the fluid binder contains at least one powder selected from the group consisting of zinc, molybdenum disulfide, and copper.

7. an electron generating unit including a powder of a natural mineral containing a radioactive substance and a powder of an electron generating material that generates electrons by alpha rays emitted from the natural mineral; an electrode unit connected to the electron generating unit, The electron generating material powder can reduce the coefficient of friction and includes titanium dioxide powder, lanthanum hexaboride, and metallic silicon.

8. The average particle size of the natural mineral powder is 200 μm or less, 8. The electron generating member according to claim 7, wherein the powder of the electron generating material has an average particle size of 200 [mu]m or less.

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