【摘要】 采用烧结法制备了Li2O-SiO2系微晶玻璃低温共烧陶瓷。通过热膨胀系数、DTA、XRD、影像式烧结点试验仪、SEM、体积电阻率等方法,研究了K2O含量对玻璃热力学性质、析晶行为、烧结性能、形貌和电学性能的影响。结果表明:用K2O取代Li2O,可降低玻璃转变温度,减弱析晶倾向,提高热膨胀系数和析晶活化能;K2O有助于玻璃粉体烧结致密,可以控制微晶玻璃晶相组成和含量。电学性能研究结果表明,K2O可显著提高微晶玻璃的电学性能。更多还原

【Abstract】 Low temperature co-fired Li2O-SiO2glass-ceramics were prepared by sintering method.The effects of K2 O content on the thermal properties,crystallization behavior,sintering character,morphology and electrical performance were investigated using thermal expansion coefficient(CTE),differential thermal analysis(DTA),X-ray diffraction(XRD)analysis,hot-stage microscopy(HSM),scanning electron microscopy(SEM)and volume resistivity.The results showed that the replacement of Li2 O by K2 O glasses led to the reduce of the glass transition temperature(Tg)and the crystallization tendency,the increases in the coefficient of thermal expansion(CTE)and the crystallization energy(E).Furthermore,K2 O is beneficial to the sintering property of the glass powders,and the control of the composition and content of crystal phase.The results of electrical performance showed that K2 O improved the electrical property of the glass-ceramics significantly.更多还原