Schwarzes Siliziumkarbid (SiC) ist ein synthetisches Schleifmaterial, das durch die Hochtemperaturreaktion von Quarzsand und Petrolkoks in einem elektrischen Widerstandsofen hergestellt wird. Es zählt zu den härtesten synthetischen Schleifmitteln mit einer Mohshärte von 9,1–9,3 und eignet sich daher ideal zum Schleifen, Schneiden und Polieren.
Anwendungen von schwarzem Siliziumkarbid:
Schleifwerkzeuge: Werden in Schleifrädern, Schleifpapier und Strahlmitteln für Metalle, Keramik und Stein verwendet.
Feuerfeste Materialien: Werden feuerfesten Steinen hinzugefügt, um die Temperaturwechselbeständigkeit zu verbessern.
Metallurgische Verwendung: Wirkt als Desoxidationsmittel bei der Stahlproduktion.
Läppen und Polieren: Wird zum Präzisionsfinish harter Materialien wie Wolframkarbid verwendet.
Rutschfeste Oberflächen: Eingearbeitet in Beschichtungen für Böden und Gehwege.
Halbleiter und Elektronik: Hochreines SiC wird aufgrund seiner Halbleitereigenschaften in der Elektronik verwendet (obwohl schwarzes SiC normalerweise weniger rein ist als grünes SiC).
| JIS-Körnung | D0 (Mikron) | D3 (Mikron) | D50 (Mikron) | D94 (Mikron) |
| #240 | ≤ 127 | ≤ 103 | 57,0 ± 3,0 | ≥ 40 |
| #280 | ≤ 112 | ≤ 87 | 48,0 ± 3,0 | ≥ 33 |
| #320 | ≤ 98 | ≤ 74 | 40,0 ± 2,5 | ≥ 27 |
| #360 | ≤ 86 | ≤ 66 | 35,0 ± 2,0 | ≥ 23 |
| #400 | ≤ 75 | ≤ 58 | 30,0 ± 2,0 | ≥ 20 |
| #500 | ≤ 63 | ≤ 50 | 25,0 ± 2,0 | ≥ 16 |
| #600 | ≤ 53 | ≤ 41 | 20,0 ± 1,5 | ≥ 13 |
| #700 | ≤ 45 | ≤ 37 | 17,0 ± 1,5 | ≥ 11 |
| #800 | ≤ 38 | ≤ 31 | 14,0 ± 1,0 | ≥ 9,0 |
| #1000 | ≤ 32 | ≤ 27 | 11,5 ± 1,0 | ≥ 7,0 |
| #1200 | ≤ 27 | ≤ 23 | 9,5 ± 0,8 | ≥ 5,5 |
| #1500 | ≤ 23 | ≤ 20 | 8,0 ± 0,6 | ≥ 4,5 |
| #2000 | ≤ 19 | ≤ 17 | 6,7 ± 0,6 | ≥ 4,0 |
| #2500 | ≤ 16 | ≤ 14 | 5,5 ± 0,5 | ≥ 3,0 |
| #3000 | ≤ 13 | ≤ 11 | 4,0 ± 0,5 | ≥ 2,0 |
| #4000 | ≤ 11 | ≤ 8,0 | 3,0 ± 0,4 | ≥ 1,8 |
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