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Metal Oxide Varistor: Zinc Oxide with Manganese and Antimony Oxides, Bismuth Paste Fired On (Masuyama 1972, Ex. 6)
A varistor with manganese dioxide and antimony trioxide mixed into the zinc oxide, and bismuth oxide fired on from a paste: 99.0 % zinc oxide, 0.5 % manganese dioxide and 0.5 % antimony trioxide by moles, sintered at 1350 °C, coated with bismuth oxide paste and fired at 800 °C. The disc measured a C-value of 190 at 1 mA and a nonlinearity exponent n of 34.5.
Source: T. Masuyama, M. Matsuoka and T. Nishi (Matsushita), US 3,663,458 (1972), Example 6. Unknown: how the aluminium is sprayed on, what the silver paint is, and how strong the epoxy solution of the paste is. The 10 g batch is our arithmetic. Picture: the patent's drawing.
Lanjutan
2 days
Instruksi
1
1
Weigh 99 : 0.5 : 0.5 and wet-mill 5 hours
Weigh 99 : 0.5 : 0.5 and wet-mill 5 hours
Mix zinc oxide, manganese dioxide and antimony trioxide 99 : 0.5 : 0.5 by moles. Ours, for 10 g: 9.771 g zinc oxide, 0.053 g manganese dioxide, 0.177 g antimony trioxide (our arithmetic). Mill wet for 5 hours, then dry, as in Example 1. Unknown: the milling liquid.
Material untuk langkah ini:
Serbuk Seng Oksida9.771 g
Mangan dioksida (pirolusit)0.053 g
Antimon trioksida0.177 gAlat yang dibutuhkan:
Neraca lengan
Ball Mill Besi
Oven pengeringan2
2
Press discs 13 mm by 2.5 mm
Press discs 13 mm by 2.5 mm
Press discs 13 mm across and 2.5 mm thick at 340 kg/cm², as in Example 1.
Alat yang dibutuhkan:
Mesin pres hidrolik
Cetakan press cakram
Jangka Sorong Vernier3
3
Sinter 1 hour at 1350 °C and furnace-cool
Sinter 1 hour at 1350 °C and furnace-cool
Sinter in air at 1350 °C for 1 hour and let the discs cool in the furnace.
Alat yang dibutuhkan:
Tungku Muffle4
4
Lap both faces
Lap both faces
Lap both faces with silicon carbide abrasive. Example 6 gives no thickness.
Alat yang dibutuhkan:
Butiran silikon karbidaJangka Sorong Vernier5
5
Coat with bismuth oxide paste and fire at 800 °C
Coat with bismuth oxide paste and fire at 800 °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 800 °C for 30 minutes. The bismuth oxide diffuses into the zinc oxide. Not given: how much paste, or the strength of the epoxy solution.
Material untuk langkah ini:
Bismut oksida1 as requiredAlat yang dibutuhkan:
Resin epoksi
n-ButanolTungku Muffle6
6
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. Unknown: the spraying method and the paint.
Material untuk langkah ini:
Batangan aluminium1 as required
Cat perak penghantar listrik1 as required
Kawat Tembaga2 buahAlat yang dibutuhkan:
Metode semprot logam yang tidak diketahuiJangka Sorong VernierBahan
7- 9.771 gPlaceholder
- 0.053 gPlaceholder
- 0.177 gPlaceholder
- 1 as requiredPlaceholder
- 1 as requiredPlaceholder
- 1 as requiredPlaceholder
- 2 buahPlaceholder
Alat yang Diperlukan
11- Placeholder
- Placeholder
- Placeholder
- Placeholder
- Placeholder
- Placeholder
- Placeholder
- Placeholder
- Placeholder
- Placeholder
- Placeholder
Cetak biru ini membuat
Blueprint terkait
Blueprint ini berbagi pengetahuan — teknik, bahan, atau prinsip
Metal Oxide Varistor: Zinc Oxide with 0.2 % Bismuth Oxide, Sintered Disc (Masuyama 1972)
oleh Ed
Industri
1
0
0
0
0
0
Metal Oxide Varistor: Zinc Oxide with 0.2 % Manganese Dioxide, Bismuth Oxide Paste Fired On (Masuyama 1972, Ex. 5)
oleh Ed
Industri
2
0
0
0
0
0
Antimony Trioxide: Roasted Antimony Fused with More Metal (Thorpe 1912)
oleh Charlie
Industri
3
0
0
0
0
0
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