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ẸWÀ ÀTI ÌLERA
IṢẸ́ ỌWỌ́
ÀṢÀ ÀTI ÌTÀN
ÌṢERÉ
ÀYÍKÁ
OÚNJẸ ÀTI OHUN MÍMU
REVERSE ENGINEERING
SÁYẸ́ǸSÌ
ERÉ ÌDÁRAYÁ
ÌMỌ̀-Ẹ̀RỌ
ÀWỌN OHUN WÍWỌ̀
Ferrite Toroid Core: Wet-Process Copper-Zinc Ferrite with a Stepped Anneal Down to 310 °C (Snoek 1948)
The wet-process copper-zinc ferrite ring of Snoek's Example II, given a long stepped anneal in oxygen after its 600 °C hold: 19 hours at 510 °C, 34 hours at 410 °C and 12 hours at 310 °C. The initial permeability fell from 500 to 410.
Source: J. L. Snoek, US 2,452,529 (Philips, 1948), Example II, wet process. Picture: our diagram.
Ilọsíwájú
3 days
Ìlànà
1
1
Dissolve the copper, zinc and iron salts
Dissolve the copper, zinc and iron salts
Make 1 litre of a purified solution of 0.2 mol copper sulphate, 0.3 mol zinc sulphate and 1 mol iron nitrate. Ours: 49.94 g copper sulphate pentahydrate; weigh the zinc sulphate and ferric nitrate for the hydrate you have.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Copper sulfate pentahydrate (CuSO4·5H2O)49.94 g
Zinc sulfate0.3 mol
Ferric nitrate1 mol
Omi Àyọ́1 lÀwọn irinṣẹ́ tí a nílò:
Òǹwọ̀n ìdọ́gba
Ago Bórósílíkéètì
Ìbọ̀wọ́ rọ́bà2
2
Precipitate hot with 9 M caustic soda
Precipitate hot with 9 M caustic soda
Heat the solution and precipitate it with 0.5 litre of 9 molar caustic soda. Ours: 180 g sodium hydroxide in water to 0.5 litre. Strong alkali: goggles and gloves.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Sodium Hydroxide — Ìwọ̀n Ilé-ìwádìí180 gÀwọn irinṣẹ́ tí a nílò:
Ago Bórósílíkéètì
Pátákó Gbígbóná
Gílásì Ààbò Fún Ìfọ́n Kẹ́míkàÌbọ̀wọ́ rọ́bà3
3
Wash, dry and pre-heat at 700 °C
Wash, dry and pre-heat at 700 °C
Wash out the deposit, dry it, and pre-heat it at 700 °C so it moulds better.
Àwọn irinṣẹ́ tí a nílò:
Bébà Ìsẹ́Omi Àyọ́
Ààrò ìgbẹ̀
Ààrò Ọ̀pọ́n
Ìkòkò ìyọ́ pẹ̀lú ìdérí (porcelain)
Ìbọ̀wọ́ Tí Ń Fara Da Ooru4
4
Mould a ring at 4 tons per cm²
Mould a ring at 4 tons per cm²
Mould the powder at 4 tons per square centimetre into a ring 3 cm across with a 4 × 4 mm section.
Àwọn irinṣẹ́ tí a nílò:
Ẹ̀rọ ìtẹ̀ háídírọ́líìkì
Ìdà Títẹ̀ Òrùka
Ìbòjú Eruku5
5
Heat 3 hours at 900 °C, cool to 600 °C, hold 30 hours
Heat 3 hours at 900 °C, cool to 600 °C, hold 30 hours
Heat the ring for about 3 hours at 900 °C, cool it to 600 °C at 5 °C per minute, hold it there for 30 hours and let it cool to room temperature, all in a current of oxygen. Snoek's core: initial permeability 500.
Àwọn irinṣẹ́ tí a nílò:
Ààrò Ọ̀pọ́n
Oxygen
Àgbá gáàsì tí a fi ìfúnpá kún
Pirómítà
Ẹmú Ìkòkò Ìyọ́Ìbọ̀wọ́ Tí Ń Fara Da Ooru6
6
Anneal 19 h at 510 °C, 34 h at 410 °C, 12 h at 310 °C
Anneal 19 h at 510 °C, 34 h at 410 °C, 12 h at 310 °C
After the 600 °C hold, keep the core for another 19 hours at 510 °C, 34 hours at 410 °C and 12 hours at 310 °C, all in oxygen. Snoek's core: initial permeability 410.
Àwọn irinṣẹ́ tí a nílò:
Ààrò Ọ̀pọ́nOxygenÀgbá gáàsì tí a fi ìfúnpá kúnPirómítàẸmú Ìkòkò Ìyọ́Ìbọ̀wọ́ Tí Ń Fara Da OoruÀwọn ohun-èlò
5- Àyè
- 0.3 molÀyè
- 1 molÀyè
- 1 lÀyè
Àwọn irinṣẹ́ tó nílò
18- Àyè
- Àyè
- Àyè
- Àyè
- Àyè
- Àyè
- Àyè
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