Improvement on microwave dielectric properties of Ba(Mg_⅓Ta_⅔)O₃ materials prepared via a two-step process

Abstract

A two-step process, which includes the formation of B-site compounds, MgTa₂O₆, followed by the formation of Ba(Mg_⅓Ta_⅔)O₃, BMT, perovskite by reacting BaCO₃ with MgTa₂O₆, has been successfully applied for synthesizing BMT materials. The powders prepared by 2-step process exhibit superior reactivity and result in ceramics with larger Q-factor (Q·f_o =600,000 GHz) than the properties obtainable for the materials prepared by the single-step process. Thermogravimetric and differential thermal analyses indicate that the mechanism is the effective suppression on the formation of secondary phase, Ba₅Ta₄O₁₅

Key Words:

• microwave dielectrics
• BMT
• Ba₅Ta₄O₁₅
• 2-step