Fine solid solution alloy particles and method for producing same
First Claim
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1. A method for producing alloy fine particles composed of a plurality of metal elements, the method comprising the steps of:
- (i) preparing a solution containing ions of the plurality of metal elements and a liquid containing a reducing agent; and
(ii) mixing the solution with the liquid that has been heated, whereinthe plurality of metal elements are a plurality of metal elements that do not form a solid solution even in the liquid phase,the reducing agent is ethylene glycol,the plurality of metal elements are silver and rhodium, andin the step (ii), the solution is mixed with the liquid that has been heated to 145°
C. or higher.
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Abstract
The alloy fine particles of the present invention are fine particles of a solid solution alloy, in which a plurality of metal elements are mixed at the atomic level. The production method of the present invention is a method for producing alloy fine particles composed of a plurality of metal elements. This production method includes the steps of: (i) preparing a solution containing ions of the plurality of metal elements and a liquid containing a reducing agent; and (ii) mixing the solution with the liquid that has been heated.
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Citations
17 Claims
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1. A method for producing alloy fine particles composed of a plurality of metal elements, the method comprising the steps of:
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(i) preparing a solution containing ions of the plurality of metal elements and a liquid containing a reducing agent; and (ii) mixing the solution with the liquid that has been heated, wherein the plurality of metal elements are a plurality of metal elements that do not form a solid solution even in the liquid phase, the reducing agent is ethylene glycol, the plurality of metal elements are silver and rhodium, and in the step (ii), the solution is mixed with the liquid that has been heated to 145°
C. or higher.- View Dependent Claims (2, 3, 4, 5, 6)
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4. The production method according to claim 1, wherein at least one selected from the liquid and the solution contains a protective agent for preventing agglomeration of the alloy fine particles.
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5. The production method according to claim 1, wherein in the step (ii), the solution is mixed with the liquid by dropping the solution into the liquid.
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6. The production method according to claim 1, wherein in the step (ii), the solution is mixed with the liquid by spraying the solution onto the liquid.
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7. A method for producing alloy fine particles composed of a plurality of metal elements, the method comprising the steps of:
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(i) preparing a solution containing ions of the plurality of metal elements and a liquid containing a reducing agent; and (ii) mixing the solution with the liquid that has been heated, wherein the plurality of metal elements are a plurality of metal elements that do not form a solid solution even in the liquid phase, the reducing agent is ethylene glycol, and in the step (ii), the solution is mixed with the liquid that has been heated to a temperature higher by 20°
C. or more than a temperature at which each of the ions of the plurality of metal elements is reduced. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method for producing alloy fine particles composed of a plurality of metal elements, the method comprising the steps of:
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(i) preparing a solution containing ions of the plurality of metal elements and a liquid containing a reducing agent; and (ii) mixing the solution with the liquid that has been heated, wherein the plurality of metal elements are a plurality of metal elements that do not form a solid solution even in the liquid phase, and in the step (ii), the solution is mixed with the liquid by spraying the solution onto the liquid. - View Dependent Claims (14, 15, 16, 17)
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Specification