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Ferrite Toroid Core: Magnesium-Zinc Ferrite (28 : 18 : 54) Fired at 1400 °C (Snoek)
Ferrite is a ceramic magnet: iron oxide combined with other metal oxides, carrying magnetic flux while hardly conducting electricity. In his first ferrite patent (US 2,452,529, 1948) Snoek at Philips ground the oxides very fine and fired rings in oxygen. This magnesium-zinc ferrite (28 : 18 : 54 mol %) is milled 30 hours and fired 2 hours at 1400 °C; his core had an initial permeability of 150.
The picture: our diagram.
Ilọsíwájú
3 days
Ìlànà
1
1
Mix 28 : 18 : 54 mol
Mix 28 : 18 : 54 mol
Mix pure magnesium oxide, zinc oxide and ferric oxide, 28 : 18 : 54 mol %. Ours, by weight: 10.06 g magnesium oxide, 13.06 g zinc oxide and 76.88 g ferric oxide per 100 g.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Ọ́sáídì magnesium10.06 g
Lulú Sínkì Ọ́ksídì13.06 g
Ọ́kísáìdì irin (III)76.88 gÀwọn irinṣẹ́ tí a nílò:
Òǹwọ̀n ìdọ́gba
Ìbòjú Eruku2
2
Grind 30 hours in an iron ball mill
Grind 30 hours in an iron ball mill
Grind the mixture for 30 hours in an iron ball mill.
Àwọn irinṣẹ́ tí a nílò:
Ẹ̀rọ Lílọ Bọ́ọ̀lù IrinÌbòjú Eruku3
3
Mould a ring at 4 tons per cm²
Mould a ring at 4 tons per cm²
Press 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 Òrùka4
4
Fire 2 hours at 1400 °C, cool slowly
Fire 2 hours at 1400 °C, cool slowly
Heat the ring in oxygen for 2 hours at 1400 °C, then cool it slowly in oxygen at 5–10 °C a minute. Snoek's core: initial permeability 150.
Àwọn irinṣẹ́ tí a nílò:
Ààrò Ọ̀pọ́n
Oxygen
Àgbá gáàsì tí a fi ìfúnpá kún
Pirómítà
Ẹmú Ìkòkò Ìyọ́
Ìbọ̀wọ́ Tí Ń Fara Da OoruÀwọn ohun-èlò
3- 10.06 gÀyè
- 13.06 gÀyè
- 76.88 gÀyè
Àwọn irinṣẹ́ tó nílò
11- Àyè
- Àyè
- Àyè
- Àyè
Ìtọ́nisọ́nà yìí ń ṣe
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