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Ferrite Toroid Core: Copper-Zinc Ferrite Milled 200 Hours, Fired at 1050 °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 copper-zinc ferrite is milled about 200 hours, fired 2 hours at 1050 °C and held 12 hours at 600 °C; his core had an initial permeability of 200.
The picture: our diagram.
Abantado
2 weeks
Mga Tagubilin
1
1
Mix 20 : 30 : 50 mol
Mix 20 : 30 : 50 mol
Mix pure copper oxide, zinc oxide and ferric oxide, 20 : 30 : 50 mol %. Ours, by weight: 13.24 g copper oxide, 20.32 g zinc oxide and 66.44 g ferric oxide per 100 g.
Mga materyales para sa hakbang na ito:
Copper Oxide13.24 g
Pulbos ng Zinc Oxide20.32 g
Ferric oxide66.44 gMga kailangang kasangkapan:
Timbangang panimbang
Maskara Laban sa Alikabok2
2
Grind about 200 hours in an iron ball mill
Grind about 200 hours in an iron ball mill
Grind the mixture for about 200 hours in an iron ball mill.
Mga kailangang kasangkapan:
Gilingang Bolang BakalMaskara Laban sa Alikabok3
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.
Mga kailangang kasangkapan:
Haydroliko na pandiin
Dais na Pang-Press ng Singsing4
4
Fire 2 hours at 1050 °C, hold 12 hours at 600 °C
Fire 2 hours at 1050 °C, hold 12 hours at 600 °C
Heat the ring for two hours at 1050 °C in a current of oxygen, cool at 5 °C a minute to 600 °C, hold it there 12 hours, then cool to room temperature, all in oxygen. Snoek's core: initial permeability 200.
Mga kailangang kasangkapan:
Hurnong Tubo
Oksiheno
Tangke ng gas na may presyon
Pirometro
Sipit ng Krisol
Guwantes na Matibay sa InitMga Materyales
3- 13.24 gPlaceholder
- 20.32 gPlaceholder
- 66.44 gPlaceholder
Mga Kinakailangang Kasangkapan
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