Because of the important application in the field of microwave communications, sensors, transducers, ferroelectric memory information technology, etc.(Ferroelectricity is a property of certain materials that have a spontaneous electric polarization that can be reversed by the application of an external electric field. The term is used in analogy to ferromagnetism, in which a material exhibits a permanent magnetic moment. Ferromagnetism was already known when ferroelectricity was discovered in 1920 in Rochelle salt by Valasek. Thus, the prefix ferro, meaning iron, was used to describe the property despite the fact that most ferroelectric materials do not contain iron.) The non-filled tungsten bronze type material have caught a lot of attention in scientific research workers. Current scientific research mainly focused on the electrical properties of non-filled tungsten bronze materials instead of other functional properties. However, with the development of modern technology, the multi-function demand of device is increasingly high, which requires the development of new material combines two or more functions in order to develop new devices simultaneously achieve multiple functions.

 

Therefore, in materials development and design, it’s necessary to do further research and develop new properties of the materials on the base of maintaining or enhancing the original functions and properties, so that the material will have the wider application. the rare earth ions are generally intrinsic ions of non-filled tungsten bronze materials, by selecting the appropriate rare earth ions activated, the luminescence functional properties of non-filled tungsten bronze materials can be developed, therefore such material is a kind of potential rare earth luminescent materials. However, the potential luminescent properties of non-filled tungsten bronze material have not been concerned. If the materials have both luminescence properties and ability to improve the existing dielectric, ferroelectric properties can be prepared, these materials will have more widely applications in the electronics industry in the future.