Structural and electromechanical properties of lead-free Na0.5Bi0.5TiO3-BaZrO3 ceramics

作者：Hussain Ali; Rahman Jamil Ur; Maqbool Adnan; Kim Min Su; Song Tae Kwon; Kim Won Jeong; Kim Myong Ho^*

来源：Physica Status Solidi A-Applications and Materials Science, 2014, 211(8): 1704-1708.

DOI：10.1002/pssa.201330472

• dielectric properties
• ferroelectric properties
• piezoelectric properties
• titanates
• zirconates

The effect of BaZrO3 (BZ) addition on the crystal structure, ferroelectric, and piezoelectric properties of Na0.5Bi0.5TiO3 (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 mu C/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.

• 出版日期2014-8