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Oriented Barium Ferrite Disc Magnet: Water Instead of a Binder (Gorter, Philips 1956, Ex. 5)
Omegatron (Wikimedia Commons) · CC BY-SA 3.0
Charlie

Nilikha ni

Charlie

28. Oktubre 2026DE
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Oriented Barium Ferrite Disc Magnet: Water Instead of a Binder (Gorter, Philips 1956, Ex. 5)

A ceramic magnet from pre-fired barium ferrite powder stirred into water, oriented in a magnetic field in the die, moulded into blocks and fired as in Example 4. In the principal direction it held 2,870 gauss with a coercive force of 1,610 oersted and a (BH)max of 1.57 × 10⁶; at right angles 1,625 gauss. Source: E. W. Gorter, G. W. Rathenau and A. L. Stuyts (Philips), US 2,762,778 (1956), Example 5. They made blocks; disc size is ours. Picture: ferrite magnets, Omegatron, Wikimedia Commons, CC BY-SA 3.0.
Abantado
3 days

Mga Tagubilin

1

Weigh barium carbonate and iron oxide

Weigh 450 g barium carbonate and 2000 g ferric oxide. Barium carbonate is poisonous if swallowed: gloves and a dust respirator.

Mga materyales para sa hakbang na ito:

Barium carbonate (witherite)Barium carbonate (witherite)450 g
Ferric oxideFerric oxide2000 g

Mga kailangang kasangkapan:

Timbangang panimbangTimbangang panimbang
Gwantes na gomaGwantes na goma
Panala sa Hininga na P100Panala sa Hininga na P100
2

Mill 20 hours under alcohol, dry

Grind the mixture in a ball mill under alcohol for 20 hours, then dry it.

Mga kailangang kasangkapan:

Gilingang Bolang BakalGilingang Bolang Bakal
Etanol - antas laboratoryo, 95 %Etanol - antas laboratoryo, 95 %
Hurnong pantuyoHurnong pantuyo
3

Pre-fire: through a 1100 °C zone in 10 minutes

Pass the dry powder at 20 mm per minute through an electric furnace with a 20 cm hot zone at 1100 °C, in air: 10 minutes in the heat. Let it cool.

Mga kailangang kasangkapan:

Hurnong TuboHurnong Tubo
Krisol na may takip (porselana)Krisol na may takip (porselana)
Guwantes na Matibay sa InitGuwantes na Matibay sa Init
4

Grind 12 hours with alcohol, dry

Pulverise the pre-fired material in a ball mill with alcohol for 12 hours, then dry it. This is the pre-fired powder.

Mga kailangang kasangkapan:

Gilingang Bolang BakalGilingang Bolang Bakal
Etanol - antas laboratoryo, 95 %Etanol - antas laboratoryo, 95 %
Hurnong pantuyoHurnong pantuyo
5

Stir into water

Stir the pre-fired powder with water, 2 cc of water per gram of powder.

Mga kailangang kasangkapan:

Distiladong TubigDistiladong Tubig
6

Orient in a first field and mould

Put the suspension in a moulding die, apply a first magnetic field and mould it into blocks. The patent does not give this field's strength.

Mga kailangang kasangkapan:

Hulmahan sa pagpindot ng diskHulmahan sa pagpindot ng disk
ElektromagnetoElektromagneto
Haydroliko na pandiinHaydroliko na pandiin
7

Heat to 500 °C in a 2000 oersted field

Put the block in an electric furnace between the magnet's poles. With a second field of 2000 oersted along the first field's direction, heat to 500 °C, which burns off the rest of the binder. Then switch the field off.

Mga kailangang kasangkapan:

Hurnong TuboHurnong Tubo
ElektromagnetoElektromagneto
Guwantes na Matibay sa InitGuwantes na Matibay sa Init
8

Sinter: through a 1280 °C zone in 5 minutes

Pass the block at 20 mm per minute through an electric furnace in air at 1280 °C with a 10 cm hot zone: about 5 minutes in the heat.

Mga kailangang kasangkapan:

Hurnong TuboHurnong Tubo
Guwantes na Matibay sa InitGuwantes na Matibay sa Init
9

Magnetise in the principal direction

Magnetise the block along the direction of the first field, the principal direction. The patent magnetises it in a field in that direction; ours: an electromagnet. Find the north face with a compass.

Mga kailangang kasangkapan:

ElektromagnetoElektromagneto
KompasKompas

Mga Materyales

2

Mga Kinakailangang Kasangkapan

14

Ang blueprint na ito ay gumagawa ng

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Disc na Magnet

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Kaugnay na Blueprint

Ang mga blueprint na ito ay nagbabahagi ng kaalaman — mga teknik, materyales, o prinsipyo

Barium Ferrite Disc Magnet: Barium Carbonate and Iron Oxide Sintered (Went, Philips 1956)

Barium Ferrite Disc Magnet: Barium Carbonate and Iron Oxide Sintered (Went, Philips 1956)

ni CharlieDE

Industriyal

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CC0 Pampublikong Domain

Ang blueprint na ito ay inilabas sa ilalim ng CC0. Malaya kang kumopya, magbago, mamahagi, at gumamit nang walang pahintulot.

Suportahan ang Maker sa pamamagitan ng pagbili ng mga produkto sa kanilang Blueprint Komisyon ng Maker itinakda ng mga Vendor, o lumikha ng bagong bersyon ng Blueprint na ito at isama bilang koneksyon sa iyong Blueprint upang ibahagi ang kita.

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