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Structural and electromechanical properties of lead‐free Na 0.5 Bi 0.5 TiO 3 –BaZrO 3 ceramics
Author(s) -
Hussain Ali,
Rahman Jamil Ur,
Maqbool Adnan,
Kim Min Su,
Song Tae Kwon,
Kim Won Jeong,
Kim Myong Ho
Publication year - 2014
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201330472
Subject(s) - materials science , ferroelectricity , dielectric , analytical chemistry (journal) , piezoelectricity , perovskite (structure) , polarization (electrochemistry) , ceramic , solid solution , phase (matter) , crystal structure , mineralogy , crystallography , composite material , chemistry , metallurgy , optoelectronics , organic chemistry , chromatography
The effect of BaZrO 3 (BZ) addition on the crystal structure, ferroelectric, and piezoelectric properties of Na 0.5 Bi 0.5 TiO 3 (NBT) ceramics synthesized by a conventional solid‐state reaction method was systemically investigated. The X‐ray diffraction profile reveals the formation of single‐phase perovskite structure for all BZ modified NBT ceramics in composition range ( x = 0–0.08). With the increase in BZ content, the maximum dielectric constant ( T m ) and depolarization temperature ( T d ) peaks shift towards lower temperatures. At room temperature, the ferroelectric response increase with increase in BZ concentration. A maximum value of remanent polarization ( P r ) 30 µC/cm 2 was obtained at x = 0.04 and, however, with further increase in BZ content polarizations values decrease. The piezoelectric constant ( d 33 ) increased from 60 pC/N for pure NBT to 112 pC/N for x = 0.040. Furthermore, a significant enhancement in the normalized strain ( d 33 * = S max / E max = 500 pm/V) was observed at x = 0.055 which can be attributed to ferroelectric and relaxor ferroelectric phase transformation.