【摘要】 将废玻璃粉与钙铝黄长石、氟化钙混合,使用反应析晶烧结法制备出主晶相为枪晶石的玻璃陶瓷。研究了钙铝黄长石和氟化钙含量、烧结温度对玻璃陶瓷晶相、相对密度、烧结率、吸水率及力学性能的影响。结果表明,加入15%(质量分数,下同)钙铝黄长石和6%氟化钙时,玻璃陶瓷中析出的主晶相为枪晶石。提高钙铝黄长石或氟化钙含量有硅灰石析出。在850℃和900℃烧结后,玻璃陶瓷的相对密度和烧结率都随钙铝黄长石或氟化钙含量的升高而降低,其中,提高氟化钙含量比提高钙铝黄长石含量对烧结阻碍作用更大;吸水率随钙铝黄长石或氟化钙含量的升高而升高;玻璃陶瓷的强度随钙铝黄长石或氟化钙含量提高而降低,随温度升高而变大。和850℃相比,900℃烧结后,枪晶石玻璃陶瓷的强度最大可提高51%。更多还原

【Abstract】 Cuspidine glass-ceramics was prepared by reactive crystallization with mixed powder of wasted glass,gehlenite and calcium fluoride. The Effects of gehlenite and calcium fluoride content and sintering temperature on the crystal phase,relative density,sintering ratio,water absorption and mechanical properties of glass-ceramics were investigated. The result show that the volume of addition,15%( in mass,the same below) of gehlenite and 6% of calcium fluoride,would crystallize cuspidine as major crystal from the parent phase glass. The wollastonite crystallized when increasing content of gehlenite or calcium fluoride; In 850 ℃ and 900 ℃ sintering glass-ceramics,the relative density and sintering ratio of glass-ceramics were decreased with the increase of gehlenite or calcium fluoride content. Among them,the increase of calcium fluoride content played a more important role than improve gehlenite content to impede sintering. The water absorption was increased with increasing of gehlenite or calcium fluoride content,and which was decreased with the increase of gehlenite or calcium fluoride content. The strength of glass-ceramics was increased with increasing of sintering temperature. In 900 ℃ sintering glassceramics,strength of cuspidine glass-ceramics was increased than in 850 ℃ sintering,and the most increase value was of 51%.更多还原