Abnormally enhanced dielectric permittivity in poly(vinylidene fluoride)/nanosized-La 2 NiO 4−δ films

SUT-NANOTEC-SLRI beamline for X-ray absorption spectroscopy

“…For the last two years, most of the research carried out at the beamline has involved investigations on valence states and local atomic structures in magnetic materials (e.g. Wongsaprom et al, 2015;Sonsupap et al, 2016;Kidkhunthod et al, 2016;Luadthong et al, 2016), dielectric materials (Boonlakhorn et al, 2015;Jumpatam et al, 2016;Meeporn et al, 2016;Wongmaneerung et al, 2016) and catalysts (Itthibenchapong et al, 2015;Srifa et al, 2015;Sanetuntikul et al, 2015;Witoon et al, 2016;Ketwong et al, 2016).…”

Significant enhancement of dielectric permittivity and percolation behaviour of La2−xSrxNiO4/poly(vinylidene fluoride) composites with different Sr doping concentrations

“…Two PVDF-based composite systems using LSNO-1 and LSNO-2 as fillers were fabricated via a solution processing method similar to a previously reported technique. 26 First, the PVDF powder was dissolved in DMF solvent at RT until the solution was transparent. Second, the LSNO-1 and LSNO-2 fillers were separately added to the PVDF solution at 5–25 vol% and continuously stirred for 4 h. To enhance the dispersion of the ceramic filler, each mixture was further ultrasonicated for 10 min.…”

Extremely reduced loss tangent with retaining ultra high dielectric permittivity in Mg2+-doped La1.9Sr0.1NiO4 ceramics

“…Giant dielectric permittivity materials such as CaCu 3 Ti 4 O 12 (CCTO) and isostructural ACu 3 Ti 4 O 12 -oxides [ [1] , [2] , [3] , [4] , [5] , [6] , [7] , [8] , [9] , [10] ], CuO [ 11 ], co-doped NiO-based oxides [ 12 , 13 ], AFe 1/2 B 1/2 O 3 (A = Ca, Sr, Ba; B = Sb, Ta, Nb) [ 14 ], co-doped TiO 2 -based oxides [ [15] , [16] , [17] , [18] , [19] , [20] , [21] , [22] ], co-doped SrTiO 3 -based oxides [ 23 ], and Ln 2-x Sr x NiO 4 ( Ln = La, Nd, and Sm) ( Ln SNO) ceramics [ [24] , [25] , [26] , [27] , [28] , [29] , [30] ], have been widely investigated in recent years. These giant dielectric materials (or colossal-permittivity materials) can exhibit extreme values of dielectric permittivity (ε′) of approximately 10 4 –10 6 compared to those of ferroelectric materials ( e.g.…”