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Fired Silver Paint: Silver Oxide and Flux in Polyvinyl Alcohol and Water (Gray, Erie Resistor 1954, Ex. 2)

작성자

28. 10월 2026

Fired Silver Paint: Silver Oxide and Flux in Polyvinyl Alcohol and Water (Gray, Erie Resistor 1954, Ex. 2)

A paint for putting silver electrodes on ceramic, glass or mica. Silver oxide and a little ceramic flux are held in polyvinyl alcohol dissolved in water. The wet paint conducts electricity, so a capacitor can be measured while it is being painted. On firing, the silver oxide turns into a silver film held on by the flux. Gray found this paint so stable that it kept six months. Source: Robert B. Gray, US 2,695,275 (Erie Resistor, 1954), Example 2. Not given: which flux, and the firing heat. Bismuth subnitrate, one of the fluxes Gray names, is ours. Picture drawn by Youblob.

초급

1 day

안내

Dissolve 2 g polyvinyl alcohol in the water

For 100 g of paint: dissolve 2 g polyvinyl alcohol in the water, warming it to help it dissolve. The water is the balance, about 34 to 44 g. Warming is ours.

이 단계의 재료:

폴리비닐알코올 분말2 g

증류수1 as required

필요한 도구:

접시 저울

붕규산 비커

전열판(핫플레이트)

붕규산 유리 막대

Grind in silver oxide and flux

Grind 50 g precipitated silver oxide and 2 to 10 g ceramic flux into the solution until smooth. Gray gives the flux only as a class; ours: bismuth subnitrate, one of the common fluxes he names. The right amount depends on the ceramic it will be fired onto.

이 단계의 재료:

산화은50 g

차질산비스무트1 as required

필요한 도구:

접시 저울

막자사발과 막자

니트릴 장갑

Add 2 to 4 g alcohol against foam

Stir in 2 to 4 g ethyl alcohol. It stops the polyvinyl alcohol from foaming.

이 단계의 재료:

에탄올 - 실험실 등급, 95 %1 as required

필요한 도구:

붕규산 유리 막대

Store

Keep it in a closed jar. Gray found no reaction between the ingredients in six months, and the paint can stand for some hours in use without stirring.

필요한 도구: