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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.
初学者
1 day
说明
1
1
Dissolve 2 g polyvinyl alcohol in the water
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.
此步骤所需材料：
聚乙烯醇粉末2 克
蒸馏水1 as required所需工具：
等臂天平
硼硅玻璃烧杯
电热板
硼硅玻璃棒2
2
Grind in silver oxide and flux
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.
此步骤所需材料：
氧化银50 克
次硝酸铋1 as required所需工具：
等臂天平
研钵与研杵
丁腈手套3
3
Add 2 to 4 g alcohol against foam
Add 2 to 4 g alcohol against foam
Stir in 2 to 4 g ethyl alcohol. It stops the polyvinyl alcohol from foaming.
此步骤所需材料：
乙醇——实验级，95 %1 as required所需工具：
硼硅玻璃棒4
4
Store
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.
所需工具：
深色玻璃密封罐材料
5- 2 克占位符
- 1 as required占位符
- 50 克占位符
- 1 as required占位符
- 1 as required占位符
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