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Ferrite Toroid Core: Copper-Zinc Ferrite Sintered at 1200 °C (Snoek 1948, Ex. I)
Charlie

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Charlie

28. Oktoba 2026DE
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Ferrite Toroid Core: Copper-Zinc Ferrite Sintered at 1200 °C (Snoek 1948, Ex. I)

A soft ferrite ring core for coils and transformers: copper, zinc and iron oxides with a little brownstone, pressed into a ring and sintered at 1200 °C in oxygen. Snoek's ring had an initial permeability of 285. Source: J. L. Snoek, US 2,452,530 (Philips, 1948), Example I and its table. Unknown: the 'violet' iron oxide, linked to an unknown head. Picture: the patent's Fig. 4, the ring core.
Juu
2 days

Maagizo

1

Weigh 20 : 30 : 50 mol % and 1 % brownstone

Mix 20 mol % pure copper oxide, 30 mol % pure zinc oxide and 50 mol % pure violet iron oxide, and add 1 % by weight of brownstone (manganese dioxide). Ours, by weight: 13.24 g copper oxide, 20.32 g zinc oxide and 66.44 g iron oxide per 100 g, plus 1 g brownstone. Unknown: what makes the iron oxide 'violet'; Snoek does not say.

Vifaa kwa hatua hii:

Oksidi ya shabaOksidi ya shaba13.24 g
Poda ya oksidi ya zinkiPoda ya oksidi ya zinki20.32 g
Oksidi ya chuma ya zambarauOksidi ya chuma ya zambarau66.44 g
Dioksidi ya manganizi (pairolusiti)Dioksidi ya manganizi (pairolusiti)1 g

Zana zinazohitajika:

Mizani ya mizani-mbiliMizani ya mizani-mbili
Barakoa ya vumbiBarakoa ya vumbi
2

Grind half an hour in an iron ball mill

Grind the mixture for half an hour in a mill with iron balls.

Zana zinazohitajika:

Kinu cha mipira ya chumaKinu cha mipira ya chuma
Barakoa ya vumbiBarakoa ya vumbi
3

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.

Zana zinazohitajika:

Mashine ya kubana ya haidrolikiMashine ya kubana ya haidroliki
Kalibu ya kubonyeza peteKalibu ya kubonyeza pete
Barakoa ya vumbiBarakoa ya vumbi
4

Sinter at 1200 °C in oxygen, cool 5–10 °C a minute

Sinter the ring at 1200 °C in a current of oxygen. Example I heats for 1 hour and cools in the oxygen at 5 to 10 °C per minute. Snoek's ring had an initial permeability of 285, measured at room temperature at 2 kHz.

Zana zinazohitajika:

Tanuru ya MrijaTanuru ya Mrija
OksijeniOksijeni
Mtungi wa gesi yenye shinikizoMtungi wa gesi yenye shinikizo
Kipima joto kaliKipima joto kali
Koleo la kaure ya kuyeyushiaKoleo la kaure ya kuyeyushia
Glavu Zinazostahimili JotoGlavu Zinazostahimili Joto

Vifaa

4

Zana Zinazohitajika

11

Mchoro huu unatengeneza

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Kiini cha toroidi cha feraiti

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Ferrite Toroid Core: Nickel-Zinc Ferrite Sintered at 1300 °C in Oxygen (Snoek)
Hatari

Ferrite Toroid Core: Nickel-Zinc Ferrite Sintered at 1300 °C in Oxygen (Snoek)

na CharlieDE

Viwandani

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Copper(II) Oxide by Heating Copper in Air

Copper(II) Oxide by Heating Copper in Air

na CharlieDE

Kemia

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