The design and preparation of the thermally stable, Mn4+ ion activated, narrow band, red emitting fluoride Na3GaF6:Mn4+ for warm WLED applications

2017 ◽  
Vol 5 (11) ◽  
pp. 2910-2918 ◽  
Author(s):  
T. T. Deng ◽  
E. H. Song ◽  
J. Sun ◽  
L. Y. Wang ◽  
Y. Deng ◽  
...  
Keyword(s):  
Room Temperature ◽  
Narrow Band ◽  
Precipitation Method ◽  
Thermally Stable ◽  
Red Phosphor ◽  
Co Precipitation

Herein, a new red phosphor Na3GaF6:Mn4+ has been designed and synthesized by a facile two-step co-precipitation method at room temperature.

Synthesis and warm-white LED applications of an efficient narrow-band red emitting phosphor, Rb2ZrF6:Mn4+

2017 ◽  
Vol 5 (29) ◽  
pp. 7253-7261 ◽  
Author(s):  
L. Y. Wang ◽  
E. H. Song ◽  
Y. Y. Zhou ◽  
T. T. Deng ◽  
S. Ye ◽  
...  
Keyword(s):  
Narrow Band ◽  
Precipitation Method ◽  
White Led ◽  
Red Phosphor ◽  
Yellow Phosphor ◽  
Co Precipitation ◽  
Red Emitting Phosphor

Phosphor Rb2ZrF6:Mn4+has been synthesizedviaa co-precipitation method. Series of WLEDs were fabricated by combining YAG:Ce3+yellow phosphor and different amount of Rb2ZrF6:Mn4+red phosphor with InGaN blue chips.

Preparation and Electrochemical Performance of Mn3O4/GR Composites Electrode Material in Supercapacitors

2019 ◽  
Vol 807 ◽  
pp. 50-56
Author(s):  
Yun Long Zhou ◽  
Zhi Biao Hu ◽  
Li Mei Wu ◽  
Jiao Hao Wu
Keyword(s):  
Room Temperature ◽  
Raw Materials ◽  
Precipitation Method ◽  
Electrochemical Performances ◽  
Manganese Sulfate ◽  
X Ray Diffraction ◽  
X Ray ◽  
Co Precipitation ◽  
A Current ◽  
Discharge Test

Using hydrated manganese sulfate and general type graphene (GR) as raw materials, Mn3O4/GR composite has been successfully prepared by the liquid phase chemical co-precipitation method at room temperature. X-ray diffraction (XRD) was used to investigate the phase structure of Mn3O4powder and Mn3O4/GR composite; The electrochemical performances of the samples were elucidated by cyclic voltammetry and galvanostatic charge-discharge test in 0.5 mol/L Na2SO4electrolyte. The results show that the Mn3O4/GR composite possesses graphene phase and good reversibility; the composite also displays a specific capacitance of 318.8 F/g at a current density of 1 A/g.

scholarly journals Synthesis and Characterization of the CaTiO3:Eu3+ Red Phosphor by an Optimized Microwave-Assisted Sintering Process

Materials ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 874
Author(s):  
Haifeng Wang ◽  
Jianwei Lu ◽  
Ruoxuan Wang ◽  
Yungu Dong ◽  
Linfeng Ding
Keyword(s):  
Red Light ◽  
Precipitation Method ◽  
Synthesis Process ◽  
Sintering Process ◽  
Time Saving ◽  
Red Phosphor ◽  
Microwave Assisted ◽  
Furnace Sintering ◽  
Co Precipitation

The synthesis process has a significant influence on the properties of Ca1-xTiO3:Eu3+x phosphors; thus, an optimized process will lead to a better performance of the Ca1-xTiO3:Eu3+x phosphors. In this work, the feasibility of synthesizing the Ca1-xTiO3:Eu3+x phosphor with a good luminescent performance by combining the chemical co-precipitation method and microwave-assisted sintering was studied. The precursor of Ca1-xTiO3:Eu3+x phosphors were prepared by the chemical co-precipitation method. To find an optimized process, we applied both of the traditional (furnace) sintering and the microwave-assisted sintering to synthesize the Ca1-xTiO3:Eu3+x phosphors. We found out that a sintering power of 528 W for 50 min (temperature around 950 °C) by a microwave oven resulted in similar emission intensity results compared to traditional furnace sintering at 900 °C for 2.5 h. The synthesized Ca1-xTiO3:Eu3+x phosphors has an emission peak at 617 nm (5D0→7F2), which corresponds to the red light band. This new synthesized method is an energy efficient, time saving, and environmentally friendly means for the preparation of Ca1-xTiO3:Eu3+x red phosphor with good luminescent performance.

Luminescence and absorbance of highly crystalline CaMoO4, SrMoO4, CaWO4 and SrWO4 nanoparticles synthesized by co-precipitation method at room temperature

2010 ◽  
Vol 506 (1) ◽  
pp. 475-481 ◽  
Author(s):  
Titipun Thongtem ◽  
Sukjit Kungwankunakorn ◽  
Budsabong Kuntalue ◽  
Anukorn Phuruangrat ◽  
Somchai Thongtem
Keyword(s):  
Room Temperature ◽  
Precipitation Method ◽  
Co Precipitation

Microstructural and Magnetic Studies on Calcined Ni-Zn Ferrite Powders Prepared by Chemical Co-Precipitation Method

2011 ◽  
Vol 264-265 ◽  
pp. 524-529
Author(s):  
I.Z. Rahman ◽  
T.T. Ahmed
Keyword(s):  
Room Temperature ◽  
Magnetic Measurements ◽  
Precipitation Method ◽  
Particle Sizes ◽  
Magnetic Studies ◽  
Zn Ferrite ◽  
Different Temperatures ◽  
Bet Technique ◽  
Co Precipitation ◽  
Cation Distributions

In this paper, we report on structural and magnetic properties of NiZn ferrite powders prepared by chemical co-precipitation method and calcined at different temperatures. Structural, topological and compositional analyses were performed by XRD, SEM, AFM and EDX techniques. The cation distributions in Ni0.8Zn0.2Fe2O4 ferrites were investigated by XPS (Al K radiation: h=1486.6 eV). Particle sizes were measured using AFM techniques and results were compared with BET technique and magnetic measurements were carried out using a vibrating sample magnetometer at room temperature.

K2NaAlF6:Mn4+red phosphor: room-temperature synthesis and electronic/vibronic structures

2018 ◽  
Vol 6 (8) ◽  
pp. 2069-2076 ◽  
Author(s):  
Xiaodong Yi ◽  
Renfu Li ◽  
Haomiao Zhu ◽  
Jun Gao ◽  
Wenwu You ◽  
...  
Keyword(s):  
Room Temperature ◽  
Temperature Synthesis ◽  
Red Phosphor ◽  
Room Temperature Synthesis ◽  
Co Precipitation

K2NaAlF6:Mn4+red phosphor was synthesizedviathe co-precipitation approach at room-temperature and its fine electronic/vibronic structures were revealed.

Synthesis and Characterization of Nano Crystalline Hydroxyapatite Spheroids Using Anionic Template for Bio Applications

2011 ◽  
Vol 493-494 ◽  
pp. 723-727
Author(s):  
P.Michael SL Shanthi ◽  
M. Ashok ◽  
R.V. Mangalaraja ◽  
T. Balasubramanian
Keyword(s):  
Size Distribution ◽  
Room Temperature ◽  
Precipitation Method ◽  
Uniform Size ◽  
Nano Crystalline ◽  
Co Precipitation ◽  
Anionic Template ◽  
Template Material ◽  
Good Agreement

Nano crystalline Hydroxyapatite (HAp) spheroids of uniform size distribution of diameter ~200 nm have been prepared by co-precipitation method at room temperature. The anionic surfactant SDS has been used as the template material. The calcinated samples were subjected to FTIR and XRD characterizations to confirm the phase of HAp. The Ca/P ratio that has been measured from the EDS spectrum 1.69 has good agreement with the theoretical value. The SEM and TEM images reveal the nano spherical nature and narrow size distribution of the HAp particles, which were good candidates for drug delivery applications.

Sodium chromium hexacyanoferrate as a potential cathode material for aqueous sodium-ion batteries

2019 ◽  
Vol 55 (97) ◽  
pp. 14633-14636 ◽  
Author(s):  
Dominika Baster ◽  
Emad Oveisi ◽  
Pierre Mettraux ◽  
Surbhi Agrawal ◽  
Hubert H. Girault
Keyword(s):  
Cathode Material ◽  
Room Temperature ◽  
Sodium Ion ◽  
Precipitation Method ◽  
Sodium Ion Batteries ◽  
Aqueous Sodium ◽  
Co Precipitation

Sodium chromium hexacyanoferrate (NaCrHCF) is obtained here using a facile co-precipitation method at room temperature.

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