Microwave-Assisted Synthesis of Strontium Tungstate Particles by A Solid-State Metathetic Route

Well crystallized strontium tungstate (SrWO4) particles were formed by a solid-state metathetic (SSM) route assisted by a microwave irradiation, showing a spherical and homogeneous morphology with sizes of 0.5-1 mu m. The synthesized SrWO4 particles were characterized I by X-ray diffraction, Fourier transform infrared spectroscopy and scanning electron microscopy. The optical properties were investigated I by photoluminescence emission and Raman spectroscopy. With excitation at 250 nm, the major peaks are located at the blue wavelength of 425-450 nm. The emission spectra of 4-8 narrow neighbored and sloped shoulders were considered to form by defects structure. The well-resolved Raman spectra for the SrWO4 particles at 920, 836, 798, 371, 334 and 235 cm(-1) provide that the synthesized particles are highly crystallized.