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Ferrite Toroid Core: Copper-Zinc Ferrite Sintered at 1200 °C, Presintered Twice at 900 °C (Snoek 1948, Ex. I)
A soft ferrite ring core for coils and transformers: copper, zinc and iron oxides with a little brownstone, presintered twice at 900 °C, pressed into a ring and sintered at 1200 °C in oxygen. Snoek's ring had an initial permeability of 450.
Source: J. L. Snoek, US 2,452,530 (Philips, 1948), Example I and its table. 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.
Lanjutan
2 days
Arahan
1
1
Weigh 20 : 30 : 50 mol % and 1 % brownstone
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. Snoek does not say what makes it 'violet'; violet iron oxide has its own blueprint.
Bahan untuk langkah ini:
Kuprum Oksida13.24 g
Serbuk Zink Oksida20.32 g
Oksida besi ungu66.44 g
Mangan dioksida (pirolusit)1 gAlatan diperlukan:
Neraca dua piring
Topeng Habuk2
2
Grind half an hour in an iron ball mill
Grind half an hour in an iron ball mill
Grind the mixture for half an hour in a mill with iron balls.
Alatan diperlukan:
Kilang Bebola BesiTopeng Habuk3
3
Presinter at 900 °C for 2 hours in oxygen
Presinter at 900 °C for 2 hours in oxygen
Heat the ground powder to 900 °C for 2 hours in oxygen and let it cool.
Alatan diperlukan:
Relau Tiub
Oksigen
Silinder gas bertekanan
Pirometer
Mangkuk pijar bertutup (porselin)
Sarung Tangan Tahan Haba4
4
Grind and presinter at 900 °C again (2 of 2)
Grind and presinter at 900 °C again (2 of 2)
Grind the powder, then heat it once more to 900 °C in oxygen. Snoek gives no times for the repeats.
Alatan diperlukan:
Kilang Bebola BesiRelau TiubOksigenSilinder gas bertekananMangkuk pijar bertutup (porselin)Sarung Tangan Tahan HabaTopeng Habuk5
5
Grind 2 hours with iron balls
Grind 2 hours with iron balls
Grind it for 2 hours in a disintegrator with iron balls.
Alatan diperlukan:
Kilang Bebola BesiTopeng Habuk6
6
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.
Alatan diperlukan:
Mesin tekan hidraulik
Acuan Penekan GelangTopeng Habuk7
7
Sinter at 1200 °C in oxygen, cool 5–10 °C a minute
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 450, measured at room temperature at 2 kHz.
Alatan diperlukan:
Relau TiubOksigenSilinder gas bertekananPirometer
Penyepit Mangkuk PijarSarung Tangan Tahan HabaBahan
4- 13.24 gPemegang Tempat
- 20.32 gPemegang Tempat
- 66.44 gPemegang Tempat
- Pemegang Tempat
Alatan Diperlukan
12- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
Blueprint ini membuat
Blueprint berkaitan
Blueprint ini berkongsi pengetahuan — teknik, bahan atau prinsip
CC0 Domain Awam
Blueprint ini dikeluarkan di bawah CC0. Anda bebas menyalin, mengubah, mengedar, dan menggunakan karya ini untuk sebarang tujuan, tanpa meminta kebenaran.
Sokong Pembuat dengan membeli produk melalui Blueprint mereka di mana mereka memperoleh Komisen Pembuat ditetapkan oleh Penjual, atau cipta iterasi baru Blueprint ini dan sertakan ia sebagai sambungan dalam Blueprint anda sendiri untuk berkongsi hasil.