LIST
FEGURÐ OG VELLÍÐAN
HANDVERK
MENNING OG SAGA
SKEMMTUN
UMHVERFI
MATUR OG DRYKKUR
ÖFUGVERKFRÆÐI
VÍSINDI
ÍÞRÓTTIR
TÆKNI
KLÆÐANLEG TÆKNI
Metal Oxide Varistor: Zinc Oxide with 5 % Bismuth Oxide, 1100 °C, 1.0 mm (Masuyama 1972)
A non-linear resistor: the current through it rises far faster than the voltage across it. Masuyama, Matsuoka and Nishi made one from zinc oxide with a little bismuth oxide: pressed into a disc, sintered, lapped, and given metal electrodes. With 5 mole % bismuth oxide, sintered at 1100 °C and lapped to 1.0 mm, the disc measured a C-value of 65 at 1 mA and a nonlinearity exponent n of 3.3.
Source: T. Masuyama, M. Matsuoka and T. Nishi (Matsushita), US 3,663,458 (1972), Example 1. Unknown: how the aluminium is sprayed on and what the silver paint is. The patent calls both well known, so they are linked to unknown heads. The 10 g batch is our arithmetic. Picture: the patent's drawing.
Lengra kominn
1 day
Leiðbeiningar
1
1
Weigh 95 : 5 and wet-mill 5 hours
Weigh 95 : 5 and wet-mill 5 hours
Mix zinc oxide and bismuth oxide 95 : 5 by moles. Ours, for 10 g: 7.684 g zinc oxide, 2.316 g bismuth oxide (our arithmetic). Mill wet for 5 hours, then dry. Unknown: the milling liquid.
Efni fyrir þetta skref:
Sinkoxíðduft7.684 g
Bismútoxíð2.316 gNauðsynleg verkfæri:
Skálavog
Járnkúlukvörn
Þurrkofn2
2
Press discs 13 mm by 2.5 mm
Press discs 13 mm by 2.5 mm
Press the powder in a mould into discs 13 mm across and 2.5 mm thick at 340 kg/cm².
Nauðsynleg verkfæri:
Vökvapressa
Pressumót fyrir skífur
Skífmælir3
3
Sinter 1 hour at 1100 °C and furnace-cool
Sinter 1 hour at 1100 °C and furnace-cool
Sinter the discs in air for 1 hour at 1100 °C, then let them cool in the furnace to room temperature (about 15-30 °C).
Nauðsynleg verkfæri:
Múffluofn4
4
Lap both faces to 1.0 mm
Lap both faces to 1.0 mm
Lap both faces with 600-mesh silicon carbide until the disc is 1.0 mm thick.
Nauðsynleg verkfæri:
KísilkarbíðkornSkífmælir5
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. Unknown: the spraying method and the paint.
Efni fyrir þetta skref:
Álhleifur1 as required
Leiðandi silfurmálning1 as required
Koparvír2 stykkiNauðsynleg verkfæri:
Óþekkt málmúðunaraðferðSkífmælirEfni
5- 7.684 gStaðgengill
- 2.316 gStaðgengill
- 1 as requiredStaðgengill
- 1 as requiredStaðgengill
- 2 stykkiStaðgengill
Þessi teikning býr til
Tengd Blueprint
Þessi blueprint deila þekkingu — tækni, efni eða meginreglur
CC0 opinbert ríki
Þessi teikning er gefin út undir CC0. Þér er frjálst að afrita, breyta, dreifa og nota þetta verk í hvaða tilgangi sem er, án þess að biðja um leyfi.
Studdu smiðinn með því að kaupa vörur í gegnum teikningu hans þar sem hann fær þóknun smiða sem seljendur ákvarða, eða búðu til nýja endurskoðun á þessari teikningu og tengdu hana sem tengingu í þinni eigin teikningu til að deila tekjum.