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Fired Silver Paint: Precipitated Silver and Flux in Polyvinyl Alcohol with Ammonia (Gray, Erie Resistor 1954, Ex. 1)
Ed

Nilikha ni

Ed

28. Oktubre 2026FI
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Fired Silver Paint: Precipitated Silver and Flux in Polyvinyl Alcohol with Ammonia (Gray, Erie Resistor 1954, Ex. 1)

A paint for putting silver electrodes on ceramic, glass or mica. Fine silver powder and a little ceramic flux are held in polyvinyl alcohol dissolved in water, with a trace of ammonia to make the wet paint conduct. So a capacitor can be measured while it is being painted. On firing, the silver becomes a film held on by the flux. The silver settles, so stir while painting. Source: Robert B. Gray, US 2,695,275 (Erie Resistor, 1954), Example 1. Not given: how the silver was precipitated, which flux, the form of the ammonia, and the firing heat. Ours: precipitated silver made by reducing silver chloride with zinc, bismuth subnitrate as the flux (one Gray names), and strong ammonia water. Picture drawn by Youblob.
Baguhan
1 day

Mga Tagubilin

1

Dissolve 4 g polyvinyl alcohol in the water

For 100 g of paint: dissolve 4 g polyvinyl alcohol in the water, warming it to help it dissolve. The water is the balance, about 35 to 44 g. Warming is ours.

Mga materyales para sa hakbang na ito:

Pulbos na polyvinyl alcoholPulbos na polyvinyl alcohol4 g
Distiladong TubigDistiladong Tubig1 as required

Mga kailangang kasangkapan:

Timbangang panimbangTimbangang panimbang
Basong BorosilikatoBasong Borosilikato
Pang-init na PlatoPang-init na Plato
Baras na Salaming BorosilicateBaras na Salaming Borosilicate
2

Grind in 50 g precipitated silver and the flux

Grind 50 g precipitated silver and 2 to 10 g ceramic flux into the solution until smooth. Gray allows some silver chloride left in the silver. Ours: silver from the zinc route, and bismuth subnitrate, one of the fluxes Gray names. The right amount of flux depends on the ceramic.

Mga materyales para sa hakbang na ito:

Pinaulang pilakPinaulang pilak50 g
Bismuth subnitrateBismuth subnitrate1 as required

Mga kailangang kasangkapan:

Timbangang panimbangTimbangang panimbang
Almires at PanghaloAlmires at Panghalo
Gwantes na NitrileGwantes na Nitrile
3

Add 0.2 to 1 % ammonia

Stir in ammonia, 0.2 to 1 % of the paint. It evaporates from the film but makes the wet paint conduct. Ours: added as strong ammonia water. Sharp fumes: work in air, goggles.

Mga materyales para sa hakbang na ito:

Solusyon ng ammonia - 25-28 %Solusyon ng ammonia - 25-28 %1 as required

Mga kailangang kasangkapan:

Baras na Salaming BorosilicateBaras na Salaming Borosilicate
Salamin Laban sa Tilamsik ng KemikalSalamin Laban sa Tilamsik ng Kemikal
Gwantes na NitrileGwantes na Nitrile
4

Stir while painting

The silver in this paint settles, so stir it while it is being applied.

Mga kailangang kasangkapan:

Baras na Salaming BorosilicateBaras na Salaming Borosilicate

Mga Materyales

5

Mga Kinakailangang Kasangkapan

7

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Precipitated Silver: Silver Chloride Reduced by Zinc in Acidulated Water (Thorpe 1913)

Precipitated Silver: Silver Chloride Reduced by Zinc in Acidulated Water (Thorpe 1913)

ni CharlieDE

Industriyal

13
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0
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Bismuth Subnitrate: Bismuth through Nitrate and Carbonate to the White Powder (USP 1870)
Mapanganib

Bismuth Subnitrate: Bismuth through Nitrate and Carbonate to the White Powder (USP 1870)

ni CharlieDE

Industriyal

6
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0
0
0
0
Polyvinyl Alcohol: Polyvinyl Acetate Stirred in Alcoholic Potash

Polyvinyl Alcohol: Polyvinyl Acetate Stirred in Alcoholic Potash

ni CharlieDE

Polymer

13
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0
0
0
0
Ammonia Water: Sal Ammoniac and Lime, Gas Caught in Cold Water
Mapanganib

Ammonia Water: Sal Ammoniac and Lime, Gas Caught in Cold Water

ni CharlieDE

Inorganiko

26
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CC0 Pampublikong Domain

Ang blueprint na ito ay inilabas sa ilalim ng CC0. Malaya kang kumopya, magbago, mamahagi, at gumamit nang walang pahintulot.

Suportahan ang Maker sa pamamagitan ng pagbili ng mga produkto sa kanilang Blueprint Komisyon ng Maker itinakda ng mga Vendor, o lumikha ng bagong bersyon ng Blueprint na ito at isama bilang koneksyon sa iyong Blueprint upang ibahagi ang kita.

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