{"id":6618,"date":"2021-04-04T12:30:22","date_gmt":"2021-04-04T12:30:22","guid":{"rendered":"https:\/\/www.aluminaceramicball.com\/?p=6618"},"modified":"2021-07-12T02:13:27","modified_gmt":"2021-07-12T02:13:27","slug":"confronto-dei-parametri-tra-polvere-di-allumina-e-polvere-di-corindone-bianco","status":"publish","type":"post","link":"https:\/\/www.aluminaceramicball.com\/it\/confronto-dei-parametri-tra-polvere-di-allumina-e-polvere-di-corindone-bianco\/","title":{"rendered":"Confronto dei parametri tra polvere di allumina e polvere di corindone bianco"},"content":{"rendered":"
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Polvere di allumina<\/a> e polvere di corindone bianco<\/a> hanno lo stesso aspetto e nomi simili. Molte persone vogliono chiarire la differenza tra loro. Di seguito ne distinguiamo la composizione e vi spieghiamo la differenza:<\/p>

1. Polvere di allumina<\/p>

(1) Aspetto: polvere bianca, fase cristallina \u03b3;<\/p>

(2) Colore: bianco, blu scuro dopo la calcinazione.<\/p>

(3) Contenuto %: maggiore di 99,9%;<\/p>

(4) Dimensione media delle particelle (nm): 20\u00b15;<\/p>

(5) Punto di ebollizione: 2980 \u2103;<\/p>

(6) Densit\u00e0 relativa (acqua = 1): 3.97-4.0;<\/p>

(7) Punto di fusione: 2010 \u2103-2050 \u2103;<\/p>

2. Polvere di corindone bianco<\/p>

(1) Forma cristallina: sistema cristallino trigonale;<\/p>

(2) Calore specifico (Cal\/g.C): 0.26 (20-90C);<\/p>

(3) Densit\u00e0: 3,90 g\/cm3;<\/p>

(4) Coefficiente di espansione lineare: (7-9)*10^-6\/K (0-1600C).<\/p>

(5) Punto di fusione: 2250C;<\/p>

(6) Indice di rifrazione: e=1,760 w=1,768 (linea Na);<\/p>

(7) *Alta temperatura di funzionamento: 1900C;<\/p>

(8) Durezza: Durezza Knoop 2000-2200Kg\/mm2, durezza Mohs 9,0;<\/p>

(9) Conduttivit\u00e0 termica: 900C a temperatura ambiente (Cal\/cm3.sec.C);<\/p>

Polvere di corindone bianco<\/a> \u00e8 adatto per la produzione di ceramiche, utensili abrasivi in resina, nonch\u00e9 per la macinazione, la lucidatura, la sabbiatura, la fusione di precisione, ecc. Pu\u00f2 essere utilizzata anche per la produzione di materiali refrattari di alta qualit\u00e0. La polvere di allumina pu\u00f2 essere utilizzata per la conduzione del calore, la lucidatura, la galvanica, la catalisi, ecc.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"

Alumina powder and white corundum powder have the same appearance and similar names. Many people want to clarify the difference between them. The following distinguishes it from its own composition and tells you the difference: 1. Alumina powder (1) Appearance: white powder, crystalline phase \u03b3 phase; (2) Color: white, dark blue after calcination. (3) Content 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