Potassium carbonate has recently been identified as a promising candidate for thermochemical energy storage. However, many salt hydrates, its reaction kinetics is relatively slow. K2CO3 metastable zone, where the kinetically hindered, which limits temperature operating window. This work aims to improve material performance, focusing on two aspects; improving outside zone and reducing width. sho...

Elusive metastable orthorhombic paracetamol single crystals were obtained by specially designed seeding technique from conventional slow evaporation method. Seeds were prepared at optimized conditions under different cooling rates from seed preparation unit and Powder x-ray diffraction (PXRD) was performed to ensure the polymorphic form of seeds. Saturated paracetamol solutions with three diffe...

We study thermal instability in NbN superconducting stripline resonators. The system exhibits extreme nonlinearity near a bifurcation, which separates a monostable zone and an astable one. The lifetime of the metastable state, which is locally stable in the monostable zone, is measured near the bifurcation and the results are compared with a theory. Near bifurcation, where the lifetime becomes ...

although cu and fe are immiscible under equilibrium conditions, they can form supersaturated solid solutions by mechanical alloying. in this paper, nano-structured of the metastable cu-fe phase containing 10, 15, 20 and 25% wt fe were synthesized by intensive ball milling for 15h, in order to achieve a solid solution of fe in cu. the phase composition, dissolution of the fe atoms into the cu ma...

We report on marked memory effects in the vortex system of twinned YBa2Cu3O7 single crystals observed in ac susceptibility measurements. We show that the vortex system can be trapped in different metastable states with variable degree of order arising in response to different system histories. The pressure exerted by the oscillating ac field assists the vortex system in ordering, locally reduci...