Synthesis and Physicochemical Properties of Yttrium Oxide Doped with Neodymium and Lanthanum

Abstract

Transparent La 0.1 Nd 0.1 Y 1.8 O 3 ceramics were prepared by use of the ethylenediaminetetraacetic acid gel process followed by sintering by hot isostatic pressing. The structure and morphology of the powders and bulk samples and the optical properties of bulk samples were investigated by use of x-ray diffraction (XRD), scanning electron microscopy, visible and near-infrared reflectance spectroscopy, and study of magneto-optic (Faraday) effects. The powders consisted of many agglomerates of fine, oval particles. XRD studies of the powder and bulk sample confirmed their single-phase composition, and spectrophotometric and magneto-optical studies in the range 500-1000 nm revealed their potential for application as an optical materials.

Investigation on the physicochemical properties of La-doped Er0.05Y1.95O3 nanopowders

“…Recently, new types of optical devices, such as high-energy laser, optical fiber amplifiers, and optical rotators, have attracted significant attention due to their unique physical properties. Y 2 O 3 , either pure or often doped with rare-earth ions, has been widely investigated as a host material for potential applications in lasers, three dimensional volumetric displays, fluorescent labels, and luminous pipes for high-intensity discharge lamps [1][2][3][4][5][6][7][8][9][10][11][12][13]. The performance of these devices is mainly dependent on the physicochemical properties of the powders that were sintered.…”

“…The powders are useful due to their good chemical and physical stability, high corrosion resistance, and broad transparency range (0.2-10 lm) [1,2,5]. The recent research and reports have shown the relatively low phonon energy (430-550 cm -1 ) [1][2][3] and high thermal conductivity [13.6 W(mK) -1 ] [1][2][3][4]. Pure yttrium oxide exhibits C-bixbyite, cubic, hexagonal, or monoclinic crystal structure [5][6][7][8][9][10].…”

“…Furthermore, citrate sol-gel process is one of wet chemical methods that receives attention due to its high efficiency and possibility to prepare high clean and nano-sized powders [4, 6-9, 13, 15]. Numerous studies conducted thus far indicate that the choice of preparation method influences the size, shape, and crystalline structure of powders, which determine optical, transmittance, and luminescence properties of sinters [1][2][3][4][5]. The rare-earth metal ions, e.g.…”

“…The rare-earth metal ions, e.g. : Nd, Er, Eu, and Tm, have been successfully used as an additive material in order to improve the performances of Y 2 O 3 materials [3][4][5][6][7][10][11][12]. Many papers have indicated that the doping of Y 2 O 3 with erbium ions allows for luminescence emission in the infrared range [3,14].…”

“…Additional substitution of La ions can also enhance luminescence in Er:Y 2 O 3 by tuning the symmetry of the crystal field around the rare-earth ions [15]. Notably, doped with rare-earth ions, Y 2 O 3 may be used as a magneto-optic ceramic potential to build a magneto-optic device [4,16]. This device is based on Faraday phenomena, and it uses external magnetic fields.…”