LIST
FEGURÐ OG VELLÍÐAN
HANDVERK
MENNING OG SAGA
SKEMMTUN
UMHVERFI
MATUR OG DRYKKUR
ÖFUGVERKFRÆÐI
VÍSINDI
ÍÞRÓTTIR
TÆKNI
KLÆÐANLEG TÆKNI
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.
Byrjandi
1 day
Leiðbeiningar
1
1
Dissolve 4 g polyvinyl alcohol in the water
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.
Efni fyrir þetta skref:
Pólývínýlalkóhólduft4 g
Eimað vatn1 as requiredNauðsynleg verkfæri:
Skálavog
Bikarglas úr bórsílíkati
Hitaplata
Bórsílíkatglerstöng2
2
Grind in 50 g precipitated silver and the flux
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.
Efni fyrir þetta skref:
Fellt silfur50 g
Bismút-subnítrat1 as requiredNauðsynleg verkfæri:
Skálavog
Mortél og mortélstautur
Nítrílhanskar3
3
Add 0.2 to 1 % ammonia
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.
Efni fyrir þetta skref:
Ammoníaklausn 25-28 %1 as requiredNauðsynleg verkfæri:
Bórsílíkatglerstöng
Hlífðargleraugu gegn efnaslettumNítrílhanskar4
4
Stir while painting
Stir while painting
The silver in this paint settles, so stir it while it is being applied.
Nauðsynleg verkfæri:
BórsílíkatglerstöngEfni
5- Staðgengill
- 1 as requiredStaðgengill
- 50 gStaðgengill
- 1 as requiredStaðgengill
- 1 as requiredStaðgengill
Þessi teikning býr til
Tengd Blueprint
Þessi blueprint deila þekkingu — tækni, efni eða meginreglur
Precipitated Silver: Silver Chloride Reduced by Zinc in Acidulated Water (Thorpe 1913)
eftir Charlie
Iðnaður
6
0
0
0
0
0
Hættulegt
Bismuth Subnitrate: Bismuth through Nitrate and Carbonate to the White Powder (USP 1870)
eftir Charlie
Iðnaður
2
0
0
0
0
0
Polyvinyl Alcohol: Polyvinyl Acetate Stirred in Alcoholic Potash
eftir Charlie
Fjölliða
12
0
0
0
0
0
Hættulegt
Ammonia Water: Sal Ammoniac and Lime, Gas Caught in Cold Water
eftir Charlie
Ólífrænt
24
0
0
0
0
0
CC0 opinbert ríki
Þessi teikning er gefin út undir CC0. Þér er frjálst að afrita, breyta, dreifa og nota þetta verk í hvaða tilgangi sem er, án þess að biðja um leyfi.
Studdu smiðinn með því að kaupa vörur í gegnum teikningu hans þar sem hann fær þóknun smiða sem seljendur ákvarða, eða búðu til nýja endurskoðun á þessari teikningu og tengdu hana sem tengingu í þinni eigin teikningu til að deila tekjum.