Optical Analysis of Ho 3+ Ions Doped BaGd2Ti4O12 Ceramics

Abstract

Ho 3+ (5 mol %) ions doped Barium Gadolinium Titanate (BaGd2Ti4O12) powder ceramics were synthesized by solid state reaction method. From the X-ray diffraction profiles it is observed that the prepared ceramics were crystallized in the form of orthorhombic structure. Agglomeration and the nanometer particle size were observed from the SEM images of the ceramics. The emission spectrum Ho 3+ : BaGd2Ti4O12 powder ceramics has shown blue emission at 467 nm (5 F3 → 5 I8) with an excitation wavelength 208 nm. Introduction. One of the most important electro ceramics is barium titanate. Barium titanate is a good dielectric material with a high dielectric constant and it is a ferroelectric, piezoelectric and pyroelectric with good nonlinear optical properties. Barium titanate compound is an electrical insulator because of its energy and it has been used for a wide range of scientific and industrial applications such as capacitors, ultrasonic transducers, piezoelectric sensors, Barium titanate ceramics applications in various fields such as optical limiting, switches, flat panel displays, modulated-type optical devices and second harmonic generation. Rare-earth ions doped titanate based phosphors have attracted significant importance for potential applications in white-light emitting diodes [1]. Gadolinium compounds doped with rare earth ions are used as the red phosphors for the preparation of WLEDs and gadolinium containing host lattices are also used for making green phosphors for colour TV tubes. From the literature, it is observed that many authors have been reported on PL analysis of titanate based systems such as gadolinium titanate, zirconium titanate, compounds can find potential applications in optoelectronic devices [2]. Rare earth ions doped ceramic hosts have a wide range of applications in the fields of lamp phosphors, solid state lighting in display devices, white light generation [3]. So for no reports have been made on the photoluminescence property of thulium doped barium gadolinium titanate (BaGd2Ti4O12) ceramics. In this paper, we report on the synthesis,XRD, SEM and PL analysis of Ho 3+ ions doped BaGd2Ti4O12 ceramics for novel applications.