Method for manufacturing rhenium-containing alloy powder, rhenium-containing alloy powder, and conductor paste

A manufacturing method and alloy powder technology, which is applied in the field of conductor paste, can solve problems such as difficult average particle size, and achieve the effects of easy control, improved production efficiency, and excellent oxidation resistance

Inactive Publication Date: 2007-04-25
SHOEI CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] As mentioned above, in the conventionally known method of producing alloy powder, it is difficult to produce alloy powder containing rhenium with small average particle size, good dispersibility, and uniform alloy ratio.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0110] Solid-phase metallic nickel particles (nickel powder) with an average particle diameter of 0.2 μm produced by PVD were supplied to the jet mill at a supply rate of 500 g / hr, and dispersed using nitrogen gas at a flow rate of 200 L / min.

[0111] In addition, rhenium oxide (Re 2 o 7 ) is heated to 300° C. to generate rhenium oxide vapor, and nitrogen gas of 10 L / min is used as a carrier gas, and is supplied to the gas flow in which the aforementioned nickel powder is dispersed at a rate of about 30 g / hour in terms of rhenium metal. Subsequently, 10 L / min of hydrogen gas was supplied to the dispersed gas flow to form a reducing atmosphere, and introduced into a reaction tube in an electric furnace heated at 1200°C. After cooling the airflow passing through the electric furnace to about 100°C, the resulting powder is collected using a bag filter.

[0112] As a result of measuring the composition of the produced powder using ICP (Inductively Coupled Plasma Spectroscopy), i...

Embodiment 2

[0122] In embodiment 1, the nitric acid solution of rhenium is sprayed with the nitrogen gas of 10L / min using a two-fluid nozzle, instead of supplying rhenium oxide (R e2 o 7 ) vapor, the minute liquid droplets produced are supplied to the air flow in which the nickel powder is dispersed at a rate of about 30 g / hour in terms of rhenium metal. Other conditions are identical with embodiment 1.

[0123] Observation with a scanning electron microscope confirmed that the produced powder was a powder having uniform particle diameters and good dispersibility consisting of particles with an average particle diameter of 0.2 μm. As a result of measuring the composition of the produced powder by ICP, it was confirmed that 6% by weight of rhenium was contained. In the analysis using a powder X-ray diffractometer, it was confirmed that the diffraction peak of nickel was slightly shifted to the low-angle side, and there were no diffraction peaks other than nickel. From the above results,...

Embodiment 3

[0125] The powder of nickel acetate tetrahydrate was supplied to the jet mill at a supply rate of 2000 g / hour, and was pulverized and dispersed by nitrogen gas at a flow rate of 200 L / min.

[0126] In addition, rhenium oxide (Re 2 o 7 ) is heated to 300°C to generate rhenium oxide vapor, and 10 L / min of nitrogen gas is used as the carrier gas, and the rhenium oxide is supplied to the gas flow in which nickel acetate powder is dispersed at a rate of about 50 g / hour in terms of rhenium metal. steam. This dispersed gas flow was introduced into a reaction tube in an electric furnace heated to 1550°C. After cooling the airflow passing through the electric furnace to about 100°C, the resulting powder is collected using a bag filter.

[0127] Observation with a scanning electron microscope confirmed that the produced powder was a powder having uniform particle diameters and good dispersibility consisting of spherical particles with an average particle diameter of 0.3 μm.

[0128]...

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PUM

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Abstract

Metal particles that can be alloyed with rhenium are dispersed as a main component in a gas phase, a rhenium oxide vapor is made to be present around these particles, the rhenium oxide is reduced, and the rhenium precipitated on the surface of the main component metal particles as a result of this reduction is diffused under a high temperature into the main component metal particles, which gives a rhenium-containing alloy powder including the main component metal and rhenium. The powder thus obtained preferably contains 0.01 to 50 wt % rhenium, has an average particle size of 0.01 to 10 mum, and is made into a conductor paste by being uniformly mixed and dispersed in an organic vehicle along with other additives as needed.

Description

technical field [0001] The present invention relates to the production method of rhenium-containing alloy powder mainly composed of nickel or platinum, palladium, iron, cobalt, ruthenium, rhodium and other metals that can be alloyed with rhenium, and more specifically relates to the method applicable to laminated ceramic electronic components A method for producing rhenium-containing alloy powder such as a conductor paste for forming an internal conductor. technical background [0002] In the field of electronics, thick-film pastes such as conductor pastes and resistor pastes are used to manufacture components such as electronic circuits, resistors, capacitors, and IC packages. This is to uniformly mix and disperse conductive particles such as metals, alloys or metal oxides with glassy binders or other additives in organic vehicles as needed to make a paste, which is applied on the substrate and passed through high temperature Firing forms a conductive coating or a resistor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/18C22C1/04
Inventor 秋本裕二永岛和郎前川雅之家田秀康釜堀康博
Owner SHOEI CHEM IND CO LTD
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