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MICROSFERE IN VETRO

DIMENSIONI

Ø mm ± mm Resistenza meccanica N Sfere per kg. (pz/kg) Superficie di contatto di 1 kg. cm2
2 0,2 900 95.493 11.994
3 0,2 1.700 28.294 7.995
4 0,3 2.300 11.937 5.997
5 0,3 2.600 6.112 4.798
6 0,3 3.600 3.537 3.998

COMPOSIZIONE CHIMICA IN %

SiO2 64 CaO 7 Na2O 15
Al2O3 5 MgO 2,5 B2O3 2,5
Composizione del vetro esente da piombo

CARATTERISTICHE FISICHE E CHIMICHE

Peso Specifico2500 ± 40 kg/m³
Coefficiente di espansione termica(9,1 ± 0,4)· 10-6 K-1
Peso della massa1485 kg/m3
Durezza Mohs6
Microdurezza Vickers e Rockwell970 – 10018 kp/cm²
Modulo di elasticità7,75 MPa
Modulo di Young E78 ?85 GPa
Classe idroliticaIV
Classe acida secondo norma DIN 12116III
Classe alcalina secondo norma CSN ISO 695A-1


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