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Ferrite Toroid Core: Magnesium-Zinc Ferrite, One-Day Grind, 1400 °C (Snoek 1948, Ex. II)
A soft ferrite ring core of magnesium-zinc ferrite: magnesia, zinc oxide and iron oxide ground for a whole day, pressed into a ring and fired at 1400 °C in oxygen. Snoek's ring had an initial permeability of 670 and a Curie point near 100 °C.
Source: J. L. Snoek, US 2,452,530 (Philips, 1948), Example II. The violet iron oxide has its own blueprint (precipitated hematite calcined at 1000-1100 °C, after Nurdini et al. 2022); Snoek does not say how his was made. Picture: the patent's Fig. 4, the ring core.
Abantado
2 days
Mga Tagubilin
1
1
Weigh 25.5 : 25.5 : 49 mol %
Weigh 25.5 : 25.5 : 49 mol %
Mix 25½ mol % pure magnesia, 25½ mol % pure zinc oxide and 49 mol % pure violet iron oxide. Ours, by weight: 9.4 g magnesium oxide, 18.99 g zinc oxide and 71.61 g iron oxide per 100 g. Snoek does not say what makes it 'violet'; violet iron oxide has its own blueprint.
Mga materyales para sa hakbang na ito:
Oksido ng magnesiyo9.4 g
Pulbos ng Zinc Oxide18.99 g
Lilang iron oxide71.61 gMga kailangang kasangkapan:
Timbangang panimbang
Maskara Laban sa Alikabok2
2
Grind for one day in an iron ball mill
Grind for one day in an iron ball mill
Grind the mixture for one day in a mill with iron balls.
Mga kailangang kasangkapan:
Gilingang Bolang BakalMaskara Laban sa Alikabok3
3
Press a ring at 4 tons per cm²
Press 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 cross-section.
Mga kailangang kasangkapan:
Haydroliko na pandiin
Dais na Pang-Press ng SingsingMaskara Laban sa Alikabok4
4
Fire 1 hour at 1400 °C, cool slowly in oxygen
Fire 1 hour at 1400 °C, cool slowly in oxygen
Heat the ring in oxygen for 1 hour at 1400 °C, then cool it slowly in oxygen. Snoek's ring had an initial permeability of 670 at room temperature and 2 kHz.
Mga kailangang kasangkapan:
Hurnong Tubo
Oksiheno
Tangke ng gas na may presyon
Pirometro
Sipit ng Krisol
Guwantes na Matibay sa InitMga Materyales
3- 9.4 gPlaceholder
- 18.99 gPlaceholder
- 71.61 gPlaceholder
Mga Kinakailangang Kasangkapan
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Ang blueprint na ito ay gumagawa ng
Kaugnay na Blueprint
Ang mga blueprint na ito ay nagbabahagi ng kaalaman — mga teknik, materyales, o prinsipyo
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