{'fraction_non_alphanumeric': 0.03927813163481953, 'fraction_numerical': 0.03184713375796178, 'mean_word_length': 6.425196850393701, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Dielectric Response and Ferroelectric Polarization of Piezoelectric Enhanced (Na0.535K0.475)(Nb0.55Ta0.45)O3 Ceramics at the Orthorhombic-Tetragonal Polymorphic Phase Transition

The piezoelectric-enhanced (Na0.535K0.475)(Nb0.55Ta0.45)O3 (NKNT) ceramics with Na/K excess and Ta substitution were prepared near the polymorphic phase composition with an orthorhombictetragonal structure. The dielectric, piezoelectric, and ferroelectric properties of the lead-free NKNT ceramics are discussed. The temperature dependences of the specific dielectric and ferroelectric properties were investigated in detail. Broadened dielectric anomalies and saturated ferroelectric P-E hysteresis loops were observed over the phase transitional temperature range of the orthorhombic-tetragonal phase (TO−T). Additionally, the particular behaviors of the dielectric and the ferroelectric polarizations at the polymorphic phase boundary (PPB) are also discussed.