Low-temperature sintering of K0.5Na0.5NbO3 lead free ceramics using nano CuO sintering aid

Effect of CuO modification on dielectric, ferroelectric and piezoelectric properties of lead-free SrBi4Ti4O15 ceramics

“…So, for reducing the volatilization of Bi 2 O 3 it is important to control the sintering process. For decreasing the sintering temperature and controlling the sintering process the importance of use of small amount sintering aid is reported by many researchers [15,16]. Hence, in the current article we investigated the effect of CuO modification on the dielectric, ferroelectric and piezoelectric properties of SBTi.…”

Large electrostrain in low‐temperature sintered NBT‐BT‐0.025FN incipient piezoceramics

“…The Archimedes method was used to evaluate the relative densities of the specimens. For the piezoelectric measurements, the samples were poled under the application of a DC electric field of 6 kV/mm in silicon oil for 10‐15 minutes, aged for 24 hours, and then measured by a quasi‐static d 33 meter (Institute of Acoustics, Chinese Academy of Science) . Ferroelectric properties (polarization—electric‐field loops) and electrostrain (strain—electric‐field loops) measurement were carried out by ferroelectric testing system (RTI‐LCII; Radiant Technologies, Albuquerque, NM) in a frequency of 1 Hz and a laser measurement system equipped with a strain gauge amplifier (MTI‐2100, Hottinger Baldwin Messtechnik GmbH).…”

“…For the piezoelectric measurements, the samples were poled under the application of a DC electric field of 6 kV/mm in silicon oil for 10-15 minutes, aged for 24 hours, and then measured by a quasi-static d 33 meter (Institute of Acoustics, Chinese Academy of Science). 35 Ferroelectric properties (polarization-electric-field loops) and electrostrain (strain-electric-field loops) measurement were carried out by ferroelectric testing system (RTI-LCII; Radiant Technologies, Albuquerque, NM) in a frequency of 1 Hz and a laser measurement system equipped with a strain gauge amplifier (MTI-2100, Hottinger Baldwin Messtechnik GmbH). The temperature-dependent dielectric properties were evaluated in frequencies of 1 kHz, 10 kHz, 100 kHz, and 1000 kHz using a high-precision LCR meter and an automatic temperature controller (Tonghui Electronic Co., Ltd.).…”

Low-temperature sintering of sodium beta alumina ceramics using nanosized SnO2 sintering aid

“…The dense microstruc- ture with no pores or cracks, observed for the ceramics prepared with 1 mol% of nanosized SnO 2 additive, was confirmation of higher density even at lower sintering temperature. The existence of SnO 2 could improve the densification behaviour of sodium beta alumina ceramics in virtue of lower sodium loss and formation of a liquid phase during the sintering process [11,22]. In liquidphase sintering, the additive melts or reacts with a small part of the major component to form an eutectic liquid.…”

“…Using sintering aids is a well known method for altering microstructure during sintering of ceramic materials which could modify densification characteristics and improve mechanical, magnetic and electrical properties of the fired sample [2][3][4][5][6]. In recent years, it has been shown that using sintering aids with nanoparticle size can reduce the required amount of sintering aids even down to 1 mol% and can also improve properties of the sintered products [7][8][9][10][11][12][13]. The unique properties of nanoparticles are primarily due to their large surface-to-volume ratio and their high activity.…”