IṢẸ́ ỌNÀ
ẸWÀ ÀTI ÌLERA
IṢẸ́ ỌWỌ́
ÀṢÀ ÀTI ÌTÀN
ÌṢERÉ
ÀYÍKÁ
OÚNJẸ ÀTI OHUN MÍMU
REVERSE ENGINEERING
SÁYẸ́ǸSÌ
ERÉ ÌDÁRAYÁ
ÌMỌ̀-Ẹ̀RỌ
ÀWỌN OHUN WÍWỌ̀
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.
Olùbẹ̀rẹ̀
1 day
Ìlànà
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.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Ẹ̀lúbọ́ polyvinyl alcohol4 g
Omi Àyọ́1 as requiredÀwọn irinṣẹ́ tí a nílò:
Òǹwọ̀n ìdọ́gba
Ago Bórósílíkéètì
Pátákó Gbígbóná
Ọ̀pá Gíláàsì Borosilicate2
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.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Fàdákà tí a sọ̀ kalẹ̀50 g
Bismuth subnitrate1 as requiredÀwọn irinṣẹ́ tí a nílò:
Òǹwọ̀n ìdọ́gba
Odó àti Ọmọ Odó
Ìbọ̀wọ́ Nítírílì3
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.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Omi amonia - 25-28 %1 as requiredÀwọn irinṣẹ́ tí a nílò:
Ọ̀pá Gíláàsì Borosilicate
Gílásì Ààbò Fún Ìfọ́n Kẹ́míkàÌbọ̀wọ́ Nítírílì4
4
Stir while painting
Stir while painting
The silver in this paint settles, so stir it while it is being applied.
Àwọn irinṣẹ́ tí a nílò:
Ọ̀pá Gíláàsì BorosilicateÀwọn ohun-èlò
5- 1 as requiredÀyè
- Àyè
- 1 as requiredÀyè
- 1 as requiredÀyè
Àwọn irinṣẹ́ tó nílò
7Ìtọ́nisọ́nà yìí ń ṣe
Blueprint tó jọra
Àwọn blueprint wọ̀nyí pín ìmọ̀ — ọ̀nà, ohun-èlò tàbí ìlànà
Precipitated Silver: Silver Chloride Reduced by Zinc in Acidulated Water (Thorpe 1913)
láti ọwọ́ Charlie
Ti Ilé-iṣẹ́
8
0
0
0
0
0
Léwu
Bismuth Subnitrate: Bismuth through Nitrate and Carbonate to the White Powder (USP 1870)
láti ọwọ́ Charlie
Ti Ilé-iṣẹ́
5
0
0
0
0
0
Polyvinyl Alcohol: Polyvinyl Acetate Stirred in Alcoholic Potash
láti ọwọ́ Charlie
Polymer
13
0
0
0
0
0
Léwu
Ammonia Water: Sal Ammoniac and Lime, Gas Caught in Cold Water
láti ọwọ́ Charlie
Inorganic
24
0
0
0
0
0
CC0 Àgbègbè Gbogbogbò
Blueprint yìí ti jáde lábẹ́ CC0. O lè ṣe àdàkọ, yí padà, pín, àti lò láìsí ìyọ̀ǹda.
Ṣàtìlẹ́yìn Olùṣẹ́dá nípa rírà àwọn ọjà nipasẹ̀ Blueprint wọn Ẹ̀san Olùṣẹ́dá tí àwọn Olùtajà gbé kalẹ̀, tàbí ṣẹ̀dá àtúnṣe tuntun ti Blueprint yìí kí o sì fi sínú Blueprint rẹ gẹ́gẹ́ bí ìsopọ̀ láti pín owó-wíwọlé.