Above-room-temperature molecular ferroelectric and fast switchable dielectric of diisopropylammonium perchlorate

Acoustically and thermally insulating epoxy foams prepared by non‐traditional expandable microspheres

“…Thus, lightweight soundproof materials attract a considerable research interest in industry and academy [1][2][3]. Based on the mass law of acoustics, the increase in density can effectively improve the sound attenuation performance of materials [4,5]. Most materials used for acoustic attenuation at present are the metals due to their high density, modulus and tensile strength [6][7][8].…”

Sequential Phase Transitions Near Room Temperature in a Metal-Crown Ether Compound SbBr3(15-Crown-5)

“…Nevertheless, the intense polarized band at 851 cm −1 is remarkable, which can be attributed to the metal−oxygen ring interactions . Raman spectra also show the presence of some relatively strong bands above 2800 cm −1 (as shown in Figure S9), corresponding to the stretching vibrations of CH 2 groups …”

Anomalous Dielectric Features and Structural Implications in Gallic Acid–Isoniazid Cocrystal Mediated by Lattice Water

“…It is of interest to note that above 389 K, the dielectric constant drops to about 5.5 and remains invariant on the cooling cycle due to the loss of the water of hydration(Figure 2 inset). Further, loss of water molecule and irreversibility of transition was also captured by in situ powder X-ray diffraction (Figure S4; Supporting Information).Thus, even though this material does not exhibit switchable dielectric phenomenon[5][6][7][8][9][10][11][12] , the appearance of a step like behavior brings out the role of lattice water initially in augmenting the value of the dielectric constant.…”

“…2 In this context, some of the physical properties like dielectric and ferroelectric behaviour [3][4][5][6][7][8][9][10][11][12] of such materials have been correlated with their structural features. In particular, considerable attention has been placed on switchable dielectric materials for data storage and data dissemination applications, resulting from the transition between dynamic/disordered phases in molecular solids.…”