Abstract
Crystallization behavior was studied for glass powders in which some portions of AlF3 in the net composition of 60(Ba0.7Sr0.3)TiO3–25SiO2–15AlF3 were replaced with Ga2O3 or Bi2O3. The replacement with Ga2O3 resulted in a progressive increase in crystallization temperature, which effectively assisted the viscous sintering of glass powders to produce densified BST glass–ceramics at relatively lower temperatures. For the Bi2O3-replaced glass powders, an increasing amount of Bi2O3 replacement lowered the crystallization temperature and yielded less densified glass–ceramics containing a considerable amount of glassy phase. The temperature dependence of permittivity was estimated for the Ga2O3- and Bi2O3-replaced glass–ceramics as a function of sintering conditions and the amount of replacement, respectively.
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