GB1004652A - Palladium-silver alloys and the production thereof - Google Patents

Palladium-silver alloys and the production thereof

Info

Publication number
GB1004652A
GB1004652A GB6338/64A GB633864A GB1004652A GB 1004652 A GB1004652 A GB 1004652A GB 6338/64 A GB6338/64 A GB 6338/64A GB 633864 A GB633864 A GB 633864A GB 1004652 A GB1004652 A GB 1004652A
Authority
GB
United Kingdom
Prior art keywords
mixture
palladium
production
formic
silver alloys
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB6338/64A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of GB1004652A publication Critical patent/GB1004652A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G4/00—Fixed capacitors; Processes of their manufacture
    • H01G4/002—Details
    • H01G4/005—Electrodes
    • H01G4/008—Selection of materials
    • H01G4/0085—Fried electrodes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/05—Metallic powder characterised by the size or surface area of the particles
    • B22F1/054—Nanosized particles
    • B22F1/056—Submicron particles having a size above 100 nm up to 300 nm
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/16—Making metallic powder or suspensions thereof using chemical processes
    • B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
    • B22F9/20—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/16—Making metallic powder or suspensions thereof using chemical processes
    • B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
    • B22F9/24—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from liquid metal compounds, e.g. solutions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C5/00—Alloys based on noble metals

Abstract

Pd-Ag alloy powder having an average particle size of 0.1-0.5 micron is produced by simultaneous precipitation from a solution containing Pd and Ag nitrates. Suitable reducing agents are hypophosphorous acid, a mixture of formic acd or hydrazine sulphate and hypophosphorous acid, a mixture of sodium or ammonium formate or hydroxylamine and sodium borohydride, or a mixture of formic or tartaric acid and hydroquinone. Prior to precipitation the pH of the nitrate solution is adjusted to between 4.5 and 6.5, e.g. by the addition of ammonium hydroxide.
GB6338/64A 1963-02-14 1964-02-14 Palladium-silver alloys and the production thereof Expired GB1004652A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US25860763A 1963-02-14 1963-02-14

Publications (1)

Publication Number Publication Date
GB1004652A true GB1004652A (en) 1965-09-15

Family

ID=22981327

Family Applications (2)

Application Number Title Priority Date Filing Date
GB6339/64A Expired GB1004653A (en) 1963-02-14 1964-02-14 Electrical capacitors and compositions for producing same
GB6338/64A Expired GB1004652A (en) 1963-02-14 1964-02-14 Palladium-silver alloys and the production thereof

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB6339/64A Expired GB1004653A (en) 1963-02-14 1964-02-14 Electrical capacitors and compositions for producing same

Country Status (2)

Country Link
DE (1) DE1458459C2 (en)
GB (2) GB1004653A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4374679A (en) 1980-05-20 1983-02-22 The Foundation: The Research Institute Of Electric And Magnetic Alloys Electrical resistant article having a small temperature dependence of electric resistance over a wide temperature range and a method of producing the same
EP0249366B1 (en) * 1986-05-30 1991-02-06 MITSUI MINING & SMELTING CO., LTD. Process for the production of silver-palladium alloy fine powder
CN111331150A (en) * 2020-04-07 2020-06-26 郑州卓而泰新材料科技有限公司 Preparation method of high-dispersion spheroidal superfine silver powder with controllable particle size

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1758069B1 (en) * 1967-03-28 1971-11-04 Du Pont METALIZING AGENTS AND CONDENSER MADE FROM THEM
GB2133623A (en) * 1982-12-20 1984-07-25 Engelhard Ind Ltd Ceramic multilayer electrical capacitors
US4663189A (en) * 1982-12-20 1987-05-05 Engelhard Corporation Ceramic multilayer electrical capacitors
US4500368A (en) * 1983-05-12 1985-02-19 Sprague Electric Company Ag/Pd electroding powder and method for making
DE102017100965B3 (en) 2016-03-02 2017-08-17 Rüdiger Miller Process for the recovery of palladium from tin-containing acidic colloidal solutions

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2752237A (en) * 1955-06-13 1956-06-26 Du Pont Silver powder and method for producing same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4374679A (en) 1980-05-20 1983-02-22 The Foundation: The Research Institute Of Electric And Magnetic Alloys Electrical resistant article having a small temperature dependence of electric resistance over a wide temperature range and a method of producing the same
EP0249366B1 (en) * 1986-05-30 1991-02-06 MITSUI MINING & SMELTING CO., LTD. Process for the production of silver-palladium alloy fine powder
CN111331150A (en) * 2020-04-07 2020-06-26 郑州卓而泰新材料科技有限公司 Preparation method of high-dispersion spheroidal superfine silver powder with controllable particle size

Also Published As

Publication number Publication date
DE1458459C2 (en) 1974-07-25
DE1458459B1 (en) 1970-03-05
GB1004653A (en) 1965-09-15

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