【摘要】 Ｐ＿２Ｏ＿５和Ｖ＿２Ｏ＿５对ＣａＯ－Ａｌ＿２Ｏ＿３－ＳｉＯ＿２系统玻璃分相与析晶行为的影响膝立东，陆德明，甘朝亢（山东轻工业学院２５０１００）ＴｈｅＥｆｆｅｃｔｓｏｆＰ＿２Ｏ＿５ａｎｄＶ＿２Ｏ＿５ｏｎｔｈｅＰｈａｓｅｓｅｐａｒａｔｉｏｎａｎｄＣｒｙｓ...更多还原

【Abstract】 The effects of P₂O₅ and V₂O₅ on the phase separation and crystallization of CaO- Al₂O₃-SiO₂ system glasses have been studied by means of DTA,ESR,STEM SADP,XBD and so on,Crysallization of the glasses containing P₂O₅ only occurs on the surface,the surface crystallization temperature increases with increase of P₂O₅ content , P₂O₅ can promote phase separation in the base glass. The feature of phase separation is that some certain spheroidal phases enriched with Si and Al are embeded in a continuous matrix phase. V₂O₅ can induoe the glass to crystallize internally if its content is more than 0.6 mol%. The glass melted at reducing atmosphere has lower crytallization temperature than that of glass melted at oxidi-zing atmosphere. The main states of vanadium in the former glass are V￣（3+）and T￣（4+）,while in the latter are V￣（5+）。V￣（5+） ions were transformed into V￣（4+）and V￣（3+） during the process of heat treatment.The existence of lower valence ions of vandadium will greatly contribute to the volume crystallization of the glasses.更多还原