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Zinc Sulphide Phosphor: Precipitated Sulphide Heated to Redness with a Flux (Thorpe 1913)
Precipitated zinc sulphide does not glow. Heated to redness together with an alkali chloride or the sulphide of another metal, it turns into the phosphorescent sulphide used for fluorescent screens.
Source: Thorpe, Dictionary of Applied Chemistry vol. 5 (1913), Zinc. Unknown: which chloride or sulphide, how much, and for how long. Thorpe names only the class, so the additive is linked to an unknown head. Crucible and furnace are ours. Picture drawn by Youblob.
Katamtaman
1 day
Mga Tagubilin
1
1
Mix the sulphide with the additive
Mix the sulphide with the additive
Grind precipitated zinc sulphide together with an alkali chloride or the sulphide of another metal. Unknown: which one and how much. Thorpe names only the class.
Mga materyales para sa hakbang na ito:
Zinc sulfide1 as required
Hindi kilalang flux1 as requiredMga kailangang kasangkapan:
Almires at Panghalo2
2
Heat to redness
Heat to redness
Heat the mixture to redness (ours: in a lidded porcelain crucible in a muffle furnace). Unknown: for how long. Let it cool.
Mga kailangang kasangkapan:
Krisol na may takip (porselana)
Muffle furnace
Sipit ng Krisol
Guwantes na Matibay sa Init3
3
Check the glow
Check the glow
Grind the cooled cake gently. Expose a little to light, then look at it in the dark: the phosphorescent sulphide glows.
Mga kailangang kasangkapan:
Almires at PanghaloMga Materyales
2- 1 as requiredPlaceholder
- 1 as requiredPlaceholder
Mga Kinakailangang Kasangkapan
5- Placeholder
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