GB569388A - Improvements in or relating to the formation of adherent silver films on non-metallic surfaces - Google Patents

Improvements in or relating to the formation of adherent silver films on non-metallic surfaces

Info

Publication number
GB569388A
GB569388A GB794143A GB794143A GB569388A GB 569388 A GB569388 A GB 569388A GB 794143 A GB794143 A GB 794143A GB 794143 A GB794143 A GB 794143A GB 569388 A GB569388 A GB 569388A
Authority
GB
United Kingdom
Prior art keywords
silver
paste
water
molecular weight
metallic surfaces
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
GB794143A
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.)
EMRYS LLEWELLYN BODYCOMBE
STC PLC
Original Assignee
EMRYS LLEWELLYN BODYCOMBE
Standard Telephone and Cables PLC
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 EMRYS LLEWELLYN BODYCOMBE, Standard Telephone and Cables PLC filed Critical EMRYS LLEWELLYN BODYCOMBE
Priority to GB794143A priority Critical patent/GB569388A/en
Publication of GB569388A publication Critical patent/GB569388A/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
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/06—Surface treatment of glass, not in the form of fibres or filaments, by coating with metals
    • C03C17/10—Surface treatment of glass, not in the form of fibres or filaments, by coating with metals by deposition from the liquid phase

Abstract

569,388. Silvering; extracting silver. STANDARD TELEPHONES & CABLES, Ltd., NEW, A. A., and BODYCOMBE, E. L. May 19, 1943, No. 7941. [Classes 82 (i) and 82 (ii)] Finely comminuted silver is manufactured by precipitating from highly concentrated solutions of silver salts at high temperatures in the presence of high molecular weight, watersoluble organic compounds, such as gelatine or liquorice extract. The precipitation may be effected by adding ammonium formate in a water solution or in the solid form. A paste suitable for application to a surface by brushing, printing or spraying is made by separating the silver in a centrifuge, washing and mixing the separated silver with a liquid vehicle which is mutually soluble with water to the extent to which it is used. Suitable liquids are water, glycerol, ethylene glycol, methyl alcohol and ethyl alcohol. It is desirable to retain about 5 per cent of a high molecular weight organic compound content in the paste. This content is adjusted by additions to the separated and washed silver. When used in the manufacture of silvered mica condensers, or generally in the production of silver films on non-metallic surfaces, the paste is applied to the surface which is then fired at a temperature below 350‹ C. for 5-15 minutes. Electrical condensers made in this manner give consistantly good power factors of between 0.00005-0.0003 measured at 1 kc. per second.
GB794143A 1943-05-19 1943-05-19 Improvements in or relating to the formation of adherent silver films on non-metallic surfaces Expired GB569388A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB794143A GB569388A (en) 1943-05-19 1943-05-19 Improvements in or relating to the formation of adherent silver films on non-metallic surfaces

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB794143A GB569388A (en) 1943-05-19 1943-05-19 Improvements in or relating to the formation of adherent silver films on non-metallic surfaces

Publications (1)

Publication Number Publication Date
GB569388A true GB569388A (en) 1945-05-22

Family

ID=9842710

Family Applications (1)

Application Number Title Priority Date Filing Date
GB794143A Expired GB569388A (en) 1943-05-19 1943-05-19 Improvements in or relating to the formation of adherent silver films on non-metallic surfaces

Country Status (1)

Country Link
GB (1) GB569388A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1775734A3 (en) * 2001-12-27 2008-04-23 Fujikura Ltd. Electrically conductive composition, electrically conductive coating and electrically conductive coating formation method
CN115483025A (en) * 2022-09-30 2022-12-16 安徽锐光电子科技有限公司 Preparation process of mica sheet capacitor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1775734A3 (en) * 2001-12-27 2008-04-23 Fujikura Ltd. Electrically conductive composition, electrically conductive coating and electrically conductive coating formation method
CN115483025A (en) * 2022-09-30 2022-12-16 安徽锐光电子科技有限公司 Preparation process of mica sheet capacitor

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