Effects of sintering temperature on the properties of donor-acceptor codoped Ba0.67Sr0.33TiO3 ceramics for pyroelectric infrared detector applications

Intrinsic pyroelectric properties of thick, coarse grained Ba 1−x Sr x TiO 3 ceramics

“…In the present case, the remnant polarization obtained from the dynamic hysteresis loop presented in the supplemental material for undoped BaTiO 3 ceramic is of about 11.5 μCcm -2 , which is higher than previous reports showing values that spread between 0.005 μC/cm 2 and 7.5 μC/cm 2 [45,[48][49][50][51]. Also, the remnant polarization for the other BST ceramics is, in general, higher than previous reports [52,53]. The present results are comparable to those recently reported for ceramics obtained by spark plasma sintering [54].…”

“…Among pyroelectric materials, barium strontium titanate (Ba 1-x Sr x TiO 3 , BST) is intensively studied for several reasons: Sr is an effective solute for decreasing the paraelectricferroelectric phase transition temperature in a wide temperature range [12][13][14][15], leading to enhanced pyroelectric properties around room temperature; BST compositions are environmentally-friendly materials, which might represent viable alternatives to replace Pbbased oxides; the total pyroelectric coefficient can be very large in materials like BST, as shown in previous literature, especially due to the contribution of the induced part [16][17][18][19][20][21].…”

Effects of sintering temperature on the properties of Mn/Y codoped Ba0.67Sr0.33TiO3 ceramics for tunable application

“…The dielectric constant peak e max increased from 3563 to 9269 with the sintering temperature increased from 1220 to 1275°C. It is well known that the dielectric properties of ceramics are affected by microstructural characteristics such as grain size and homogeneity of the grains, as well as density of the specimens [5,14]. The magnitude of the dielectric maxima e max is strongly dependent on the average grain size, e max increase with grain size increase [15].…”

“…On the other hand, the crystal structure of ferroelectric material depends on the thermal history and the fabrication method [11,12]. It was reported that the superfine BST powders with high reactivity can be prepared by citrate precursor method, which improved sinterability and enhanced electrical properties of BST ceramics [4,5].…”

“…Researchers have put a great deal of effort into the research and development of lead-free materials. In recent years, lead-free ceramics such as KNN-based piezoceramics [1][2][3], BST-based ferroelectric ceramics [4,5] and CCTO dielectric ceramics [6] have been given much attention due to their excellent electrical properties. BST ferroelectric material is one of the promising candidates for phase shifters, tunable filters and dynamic random access memory applications [7,8].…”