Pakikipagtulungan
SINING
BEAUTY AT WELLNESS
CRAFTS
KULTURA AT KASAYSAYAN
LIBANGAN
KAPALIGIRAN
PAGKAIN AT INUMIN
REVERSE ENGINEERING
AGHAM
ISPORTS
TEKNOLOHIYA
MGA WEARABLE
Metal Oxide Varistor: Pure Zinc Oxide at 1350 °C, Bismuth Oxide Paste Fired at 600 °C (Masuyama 1972, Ex. 4)
A varistor made the other way round: a disc of pure zinc oxide, sintered, with bismuth oxide fired into its faces from a paste instead of mixed in. Sintered at 1350 °C and fired with the paste at 600 °C, the disc measured a C-value of 13 at 1 mA and a nonlinearity exponent n of 4.2. Masuyama found that firing on the bismuth oxide paste raises n a great deal over mixing it in.
Source: T. Masuyama, M. Matsuoka and T. Nishi (Matsushita), US 3,663,458 (1972), Example 4. Unknown: what the silver paint is, and how strong the epoxy solution of the paste is. The spraying is ours, after US Army Corps of Engineers EM 1110-2-3401 (1999). The 10 g batch is our arithmetic. Picture: the patent's drawing.
Abantado
2 days
Mga Tagubilin
1
1
Press pure zinc oxide at 340 kg/cm²
Press pure zinc oxide at 340 kg/cm²
Press zinc oxide powder at 340 kg/cm². Example 4 gives no disc size; ours: discs 13 mm across and 2.5 mm thick in the mould of Example 1.
Mga materyales para sa hakbang na ito:
Pulbos ng Zinc Oxide1 as requiredMga kailangang kasangkapan:
Timbangang panimbang
Haydroliko na pandiin
Hulmahan sa pagpindot ng disk
Kalipers na Vernier2
2
Sinter 1 hour at 1350 °C and cool
Sinter 1 hour at 1350 °C and cool
Heat the pressed disc for 1 hour at 1350 °C, then let it cool to room temperature.
Mga kailangang kasangkapan:
Muffle furnace3
3
Lap both faces
Lap both faces
Lap both faces with silicon carbide abrasive. Example 4 gives no thickness.
Mga kailangang kasangkapan:
Butil ng silicon carbideKalipers na Vernier4
4
Coat with bismuth oxide paste and fire at 600 °C
Coat with bismuth oxide paste and fire at 600 °C
Coat both lapped faces with a paste of 50 % by weight bismuth oxide in a solution of epoxy resin in butyl alcohol, and fire it in air at 600 °C for 30 minutes. The bismuth oxide diffuses into the zinc oxide. Not given: how much paste, or the strength of the epoxy solution.
Mga materyales para sa hakbang na ito:
Bismuth oxide1 as requiredMga kailangang kasangkapan:
Dagtang epoksi
n-ButanolMuffle furnace5
5
Spray aluminium electrodes and attach leads
Spray aluminium electrodes and attach leads
Spray a metallised film of aluminium on both faces. Attach a lead wire to each with conductive silver paint, as in Example 1. Ours, after US Army Corps of Engineers EM 1110-2-3401 (1999): wire-arc spray the aluminium from two 3.2 mm wires melted by an 18-40 V DC arc and atomised by compressed air, 15-20 cm from the disc and never at less than 45°, in at least two coats at right angles of 50-75 µm each. Unknown: the paint.
Mga materyales para sa hakbang na ito:
Bareta ng aluminyo1 as 3.2 mm spray wire
Pinturang pilak na nagdadala ng kuryente1 as required
Kawad na Tanso2 pirasoMga kailangang kasangkapan:
Kalipers na Vernier
Baril na pang-spray na may arko ng kawad
Pang-industriyang panipil ng hanginMga Materyales
5- 1 as requiredPlaceholder
- 1 as requiredPlaceholder
- 1 as 3.2 mm spray wirePlaceholder
- 1 as requiredPlaceholder
- 2 pirasoPlaceholder
Mga Kinakailangang Kasangkapan
10- Placeholder
- Placeholder
- Placeholder
- Placeholder
- Placeholder
- Placeholder
- Placeholder
- Placeholder
- Placeholder
- Placeholder
Ang blueprint na ito ay gumagawa ng
Kaugnay na Blueprint
Ang mga blueprint na ito ay nagbabahagi ng kaalaman — mga teknik, materyales, o prinsipyo
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.