Preparation of strontium-based fibers via electrospinning technique

The Sr-based fiber was prepared by electrospinning process. The effect of electric field, precursor viscosity, and calcination temperature (Tcal) was investigated at required conditions. Then the Sr-based fiber was characterized by TGA, nitrogen adsorption, SEM, TEM, and XRD to elucidate thermal transition, specific surface area, morphology, crystal structure, and crystalline phase of the samples, respectively. The result showed that the smooth fiber sample could be spun at electric field of 1.5 kV cm−1 with the suitable viscosity of ca. 5 Pa s. Finally the crystalline phase could be controlled by properly adjusting Tcal, i.e. when the Tcal was risen from 400 to 1000 °C, the crystalline phase was transformed from SrCO3 to Sr(OH)2H2O, and eventually to SrO.