Low temperature preparation and optical properties of K2Ti6O13
writer：Li, Jing，Zhang, Yong Cai*，Zhang, Ming
keywords：Ceramics, Semiconductors, Optical materials and properties,Powder technology
source：期刊
specific source：Materials Letters
Issue time：2012年
A simple and cost-effective route was developed for the low temperature (700 °C) synthesis of K2Ti6O13 powder, using low-melting-point KNO3 and high-reactive-activity P25 TiO2nanocrystals as the reactants. The characterization results from X-ray diffraction and field emission scanning electron microscopy revealed the successful preparation of monoclinic phase K2Ti6O13 crystallites with a rodlike morphology. UV–vis diffuse reflectance spectrum disclosed that the as-synthesized K2Ti6O13 had a direct optical band gap of about 3.47 eV. Besides, the as-synthesized K2Ti6O13 displayed strong and wide visible light emission in the wavelength range of about 400–700 nm upon laser excitation at 325 nm at room temperature, enabling its use as a promising blue light-emitting material.