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首页> 外文期刊>Japanese journal of applied physics >Piezoelectric Properties And Densification Based On Control Of Volatile Mass Of Potassium And Sodium In (k_(0.5)na_(0.5))nbo_3 Ceramics
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Piezoelectric Properties And Densification Based On Control Of Volatile Mass Of Potassium And Sodium In (k_(0.5)na_(0.5))nbo_3 Ceramics

机译：基于（k_（0.5）na_（0.5））nbo_3陶瓷中钾和钠挥发性物质控制的压电特性和致密化

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摘要

Recently lead-free ceramic systems have been intensively studied in order to fabricate environmentally friendly piezoelectric ceramics and replace widely used lead-free piezoelectric ceramics. The (K_(0.5)Na_(0.5))NbO_3 (KNN) piezoelectric ceramics with non-lead piezoelectric ceramics were manufactured by conventional solid-state synthesis, and we obtained sintered bodies with relative densities over 97.4% by adding excess K (0.44 mol %)/Na (0.22 mol %) to improve sinterability. The composition of the sintered bodies was close to stoichiometric compounds. The electromechanical coupling factor (k_p) and piezoelectric constant (d_(33)) of KNN + excess K (0.44 mol %)/Na (0.22 mol %) composition ceramics showed optimal values of 0.341 and 126 pC/N, respectively.
机译：最近，对无铅陶瓷体系进行了深入研究，以制造环保的压电陶瓷并取代广泛使用的无铅压电陶瓷。通过传统的固态合成方法制造了具有无铅压电陶瓷的（K_（0.5）Na_（0.5））NbO_3（KNN）压电陶瓷，并通过添加过量的K（0.44 mol）获得了相对密度超过97.4％的烧结体％）/ Na（0.22 mol％）以提高烧结性。烧结体的组成接近化学计量的化合物。 KNN +过量K（0.44 mol％）/ Na（0.22 mol％）组成的陶瓷的机电耦合系数（k_p）和压电常数（d_（33））分别显示最佳值0.341和126 pC / N。

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