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Micropolvere di ossido di alluminio marrone 500#

$780.00 /MT

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L’allumina fusa marrone è un prodotto fabbricato mediante riduzione graduale per fusione della bauxite calcinata in un forno ad arco elettrico ad alta temperatura (circa 2000 gradi Celsius). La sua composizione chimica è costituita principalmente da Al 2 O 3  (94,5-97%) e quantità vestigiali di TiO 2 , SiO 2 , Fe 2 O 3 , CaO e MgO.

L’ossido di alluminio marrone è caratterizzato da buona tenacità, elevata resistenza meccanica e durezza (9 nella scala di Mohs). La microdurezza del materiale raggiunge circa 1900kG/mm 2 . Il peso specifico (densità) è pari a 3,90+/-0,05 g/cm 3 . La densità apparente a seconda delle dimensioni è pari a 1,52-1,87 g/cm 3 . Ha una conduttività termica relativamente elevata e una bassa dilatazione termica. Per quanto riguarda l’elettricità è un isolante.

Allumina fusa marrone JIS 360#
Composizione chimica Percentuale
Al2O3​​​ ≥94,0%
Fe2O3 ≤0,5%
Il 2 O ≤0,30%
SiO2​ ≤1,50%
TiO2 1,5-3,8%
Alto ≤0,30%
Indice fisico-chimico
Densità apparente 1,53-1,99 g/cm3
Densità del grano 3,90 g/cm3
Durezza Morse 9

Le polveri di ossido di alluminio fuso marrone  sono il materiale perfetto, prodotto specificamente per essere utilizzato per applicazioni abrasive generiche in utensili abrasivi legati e processi di lappatura e lucidatura. Mentre l’ossido di alluminio ha una durezza e una capacità abrasiva inferiori rispetto al diamante, al carburo di boro e al carburo di silicio, è ampiamente utilizzato per la rettifica di materiali ferrosi, la finitura di materiali duri e resistenti, il riempimento di parti in ceramica quando il costo di lavorazione è importante.

Articolo D0（uno） D3(di solito) D50(uno) D94(di)
#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

 

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