Kerjasama
SENI
KECANTIKAN & KESEJAHTERAAN
KRAFTANGAN
BUDAYA & SEJARAH
HIBURAN
ALAM SEKITAR
MAKANAN & MINUMAN
KEJURUTERAAN TERBALIK
SAINS
SUKAN
TEKNOLOGI
BOLEH PAKAI
Metal Oxide Varistor: Zinc Oxide with 0.5 % Chromic Oxide, Bismuth-Manganese Oxide Paste Fired On (Masuyama 1972, Ex. 7)
A varistor whose bismuth oxide and manganese dioxide are both fired on from a paste: 99.5 % zinc oxide with 0.5 % chromic oxide by moles, sintered at 1350 °C, coated with a 70 : 30 bismuth oxide and manganese dioxide paste and fired at 800 °C. The disc measured a C-value of 167 at 1 mA and a nonlinearity exponent n of 34.2.
Source: T. Masuyama, M. Matsuoka and T. Nishi (Matsushita), US 3,663,458 (1972), Example 7. 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.
Lanjutan
2 days
Arahan
1
1
Weigh 99.5 : 0.5 and wet-mill 5 hours
Weigh 99.5 : 0.5 and wet-mill 5 hours
Mix zinc oxide and chromic oxide 99.5 : 0.5 by moles. Ours, for 10 g: 9.907 g zinc oxide, 0.093 g chromic oxide (our arithmetic). Mill wet for 5 hours, then dry, as in Example 1. Unknown: the milling liquid.
Bahan untuk langkah ini:
Serbuk Zink Oksida9.907 g
Kromik Oksida0.093 gAlatan diperlukan:
Neraca dua piring
Kilang Bebola Besi
Ketuhar 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.
Alatan diperlukan:
Mesin tekan hidraulik
Acuan tekan cakera
Angkup 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.
Alatan diperlukan:
Relau Muffle4
4
Lap both faces
Lap both faces
Lap both faces with silicon carbide abrasive. Example 7 gives no thickness.
Alatan diperlukan:
Grit silikon karbidaAngkup Vernier5
5
Coat with bismuth and manganese oxide paste, fire at 800 °C
Coat with bismuth and manganese oxide paste, fire at 800 °C
Coat both lapped faces with a paste whose solids are 70 % bismuth oxide and 30 % manganese dioxide by weight, and fire it in air at 800 °C for 30 minutes. Example 7 does not name the paste's liquid; ours: the epoxy-resin butyl-alcohol solution of Example 4. Not given: how much paste.
Bahan untuk langkah ini:
Bismut oksida1 as required
Mangan dioksida (pirolusit)1 as requiredAlatan diperlukan:
Resin epoksi
n-ButanolRelau 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. 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.
Bahan untuk langkah ini:
Jongkong aluminium1 as 3.2 mm spray wire
Cat perak konduktif1 as required
Dawai Tembaga2 kepingAlatan diperlukan:
Angkup Vernier
Pistol semburan arka wayar
Pemampat udara industriBahan
7- 9.907 gPemegang Tempat
- 0.093 gPemegang Tempat
- 1 as requiredPemegang Tempat
- 1 as requiredPemegang Tempat
- 1 as 3.2 mm spray wirePemegang Tempat
- 1 as requiredPemegang Tempat
- 2 kepingPemegang 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.