常见氧化物等电点

ThefollowinglistgivesthepH25℃ofisoelectricpointat25℃forselectedmaterialsinwater:Tungsten(VI)oxideWO30.2-0.5Antimony(V)oxideSb2O50.4to1.9Vanadium(V)oxide(vanadia)V2O51-2Siliconoxide(silica)SiO21.7-3.5Siliconcarbide(alpha)SiC2-3.5Tantalum(V)oxideTa2O52.7-3.0Tin(IV)oxideSnO24-5.5(7.3)Zirconium(IV)oxide(zirconia)ZrO24-11Manganese(IV)oxideMnO24-5Deltamanganese(IV)oxidedelta-MnO21.5Betamanganese(IV)oxidebeta-MnO27.3Titanium(IV)oxide(titania)(rutileoranatase)TiO23.9-8.2SiliconnitrideSi3N46-7Iron(II,III)oxide(magnetite)Fe3O46.5-6.8Gammairon(III)oxide(maghemite)Fe2O33.3-6.7Cerium(IV)oxide(ceria)CeO26.7-8.6Chromium(III)oxide(chromia)Cr2O37(6.2-8.1)Gammaaluminiumoxide(gammaalumina)Al2O37-8Thallium(I)oxideTl2O8Alphairon(III)oxide(hematite)Fe2O38.4-8.5Alphaaluminiumoxide(alphaalumina,corundum)Al2O38-9SiliconnitrideSi3N49Yttrium(III)oxide(yttria)Y2O37.15-8.95Copper(II)oxideCuO9.5ZincoxideZnO8.7-10.3Lanthanum(III)oxideLa2O310Nickel(II)oxideNiO10-11(9.9-11.3)Lead(II)oxidePbO10.7-11.6Magnesiumoxide(magnesia)MgO12-13(9.8-12.7)