The Investigations on Luminescence Characteristics and Influence of Doping and Co-Doping Different Rare Earth Ions in White Phosphorescence Materials Having Different Luminescent Centers

2014 ◽  
Vol 90 ◽  
pp. 133-140
Author(s):  
Erkul Karacaoglu ◽  
Bekir Karasu ◽  
Esra Öztürk
Keyword(s):  
Particle Size ◽  
Rare Earth ◽  
Solid State ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Rare Earths ◽  
Solid State Reaction ◽  
Solid State Reaction Method ◽  
Reaction Method ◽  
Luminescence Characteristics

The Akermanite type alkaline earth silicate Ca2MgSi2O7 activated by different types of rare earths was prepared by the conventional solid state reaction method under weak reductive atmosphere. The phase formation, particle size distribution, particle morphologies and photoluminescence properties of the samples have been investigated respectively. The comparative results of SEM and laser particle size analysis revealed that the relatively regular morphology, smaller particle size distribution could be achieved for the phosphors synthesized by the solid state reaction method including dry-ground after which powders were sieved below 170 meshes. The effects of rare earth oxides; Nd2O3, Pr6O11, Ce2O3 and Sm2O3 on the luminescence properties of the host material, Ca2MgSi2O7, were studied. Remarkable enhancement and novel color emitting including white in luminescence characteristics of host material were observed as a result of doping the mentioned rare-earths were doped.

scholarly journals Growth of significantly low dimensional zinc orthotitanate (Zn2TiO4) nanoparticles by solid state reaction method

2018 ◽  
Vol 50 (1) ◽  
pp. 133-138 ◽  
Author(s):  
Lizina Khatua ◽  
Rudrashish Panda ◽  
Avanendra Singh ◽  
Arpan Nayak ◽  
Pravakar Satapathy ◽  
...  
Keyword(s):  
Particle Size ◽  
Solid State ◽  
Surface Area ◽  
Solid State Reaction ◽  
Average Particle Size ◽  
Cost Effective ◽  
Solid State Reaction Method ◽  
Average Particle ◽  
Reaction Method ◽  
Low Dimensional

In this work, the ZnO-TiO2 mixed phase nanoparticles were prepared by solid state reaction method by using ZnO and TiO2 powder as precursors. The X-ray diffraction pattern shows a dominant phase of Zinc Orthotitanate (Zn2TiO4). The average particle size (58?18 nm) calculated by the analysing FESEM data closely matches with the particle size calculated by Scherrer?s equation. The calculated average particle size is significantly smaller than the previously published results of nanoparticles, prepared by same method. In the Brunauer-Emmett-Teller (BET) study the specific surface area of the nanoparticles was found as 8.78 m2/g which is similar to the surface area reported in this material prepared by mechanochemical method. The method which we report is simpler and cost effective unlike the previous reported.

Photoluminescence properties of Pr3+, Sm3+ and Tb3+ doped SrAlSi4N7 and energy level locations of rare-earth ions in SrAlSi4N7

2014 ◽  
Vol 2 (37) ◽  
pp. 7952-7959 ◽  
Author(s):  
Zhi-Jun Zhang ◽  
Otmar M. ten Kate ◽  
Anneke Delsing ◽  
Pieter Dorenbos ◽  
Jing-Tai Zhao ◽  
...  
Keyword(s):  
Rare Earth ◽  
High Temperature ◽  
Solid State ◽  
Energy Level ◽  
Solid State Reaction ◽  
Solid State Reaction Method ◽  
Rare Earth Ions ◽  
Photoluminescence Properties ◽  
Reaction Method

RE3+ (RE = Pr, Sm, and Tb)-doped SrAlSi4N7 samples were synthesized by a solid-state reaction method at high temperature, and their photoluminescence properties were investigated.

Preparation and Identification of Barium Monoferrite by Solid State Reaction Method

2019 ◽  
Vol 34 ◽  
pp. 46-52
Author(s):  
Iulian Ştefan ◽  
Gabriel Benga ◽  
Ionel Dănuț Savu ◽  
Sorin Vasile Savu ◽  
Adrian Olei
Keyword(s):  
Particle Size ◽  
Solid State ◽  
Mechanical Alloying ◽  
Solid State Reaction ◽  
Barium Carbonate ◽  
Solid State Reaction Method ◽  
High Energy ◽  
Phase Identification ◽  
Formation Temperature ◽  
Reaction Method

In this paper, BaFe2O4 was prepared from BaCO3 and Fe2O3 powders through the solid state reaction method. This method starts by mixing the barium carbonate and iron oxide in order to homogenize the raw materials and takes place in a wet medium. For a better homogenization of BaCO3 and Fe2O3 powders and in order to reduce the monoferrite formation temperature, it was used the mechanical alloying process for 3 and 9 hours in a high energy ball mill. Particle size distributions of the milled powders were analyzed by a BROOKHAVEN 90PLUS device. To understand the phase formation temperature, thermogravimetry analysis was carried out. The phase identification of the calcined powder was carried out by D8 Discover Bruker X-ray diffractometer. The results showed that once with the reduction of powders particle size, in the mechanical alloying process, the temperature of the solid state reaction of barium monoferrite was also reduced.

Influence of particle size distribution of precursor oxides on the synthesis of cordierite by solid-state reaction

2005 ◽  
Vol 153 (1) ◽  
pp. 34-42 ◽  
Author(s):  
J.R. González-Velasco ◽  
R. Ferret ◽  
R. López-Fonseca ◽  
M.A. Gutiérrez-Ortiz
Keyword(s):  
Particle Size ◽  
Solid State ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Solid State Reaction

Particle Size and Band Gap Calculation of Pure Y2SiO5 Crystal Synthesized by Solid-State Reaction Method

2021 ◽  
Vol 51 (3) ◽  
pp. 599-604
Author(s):  
Kanchan Upadhyay ◽  
Sabu Thomas ◽  
Nandakumar Kalarikkal ◽  
Raunak Kumar Tamrakar
Keyword(s):  
Particle Size ◽  
Solid State ◽  
Band Gap ◽  
Solid State Reaction ◽  
Solid State Reaction Method ◽  
Reaction Method
Sign in / Sign up

Export Citation Format

Share Document