= 8.9*10 -4 Pa*s = 3.2*10-4 Pa*s : -: -,N2O = 8.4*10-2 Pa*s - Na2O,MgO 5 = 2.7 Pa*s -: - CO2,SO2,P2O6 - Al2O3,ZnO . :Na2O2,BaO2- : 2( Na,K) 2Mg+O22MgO