... , granularity 0.15-0.7um , refractive index is 1.95-2.05 , specific heat in 20 °C 0.0915 ka. /g. °C, melting point ... 1973 °C, Zinc oxide evaporates in 1000 °C .Standard: HHXPQB-YHX(HX)- ... 2005Technical index Itemtyrerubberdesulphurizer1 #2 #Zinc oxide ( ZnO ),% ≥95-9895-9895-9895-98Moisture,% ≤0.70.70 ...