Low-temperature synthesis and particle-size control in yttrium-based phosphors

1997 ◽  
Vol 5 (2) ◽  
pp. 107 ◽  
Author(s):  
D. Ravichandran ◽  
Rustum Roy ◽  
William B. White
Keyword(s):  
Particle Size ◽  
Low Temperature ◽  
Size Control ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis ◽  
Particle Size Control

scholarly journals Low temperature synthesis and characterization of Mn3O4 nanoparticles

2007 ◽  
Vol 5 (1) ◽  
pp. 169-176 ◽  
Author(s):  
Abdülhadi Baykal ◽  
Yüksel Köseoğlu ◽  
Mehmet Şenel
Keyword(s):  
Particle Size ◽  
Infrared Spectroscopy ◽  
Low Temperature ◽  
Synthesis And Characterization ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis ◽  
X Ray ◽  
Peak Broadening ◽  
Mn3o4 Nanoparticles

AbstractHeating hydrous manganese (II) hydroxide gel at 85 °C for 12 hours produces Mn3O4 nanoparticles. They were characterized by X-ray powder diffraction (XRD) and infrared spectroscopy (FTIR). The particle size estimated from the SEM and X-ray peak broadening is approximately 32 nm, showing them to be nanocrystalline. EPR measurements confirm a typical Mn2+signal with a highly resolved hyperfine structure.

scholarly journals LOW-TEMPERATURE SYNTHESIS OF SUPERPARAMAGNETIC Zn0.8Ni0.2Fe2O4 FERRITE NANOPARTICLES

2018 ◽  
Vol 56 (1) ◽  
pp. 31
Author(s):  
Luong Thi Quynh Anh ◽  
Nguyen Van Dan ◽  
Do Minh Nghiep
Keyword(s):  
Particle Size ◽  
Magnetic Properties ◽  
Oleic Acid ◽  
Low Temperature ◽  
Coercive Force ◽  
Saturation Magnetization ◽  
Ferrite Nanoparticles ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis ◽  
Co Precipitation

The crystalline nanoparticles of Ni0.2Zn0.8Fe2O4 ferrite were synthesized by chemical co-precipitation with precursor concentration of 0.1M, then modified by 0.25M solution of oleic acid in pentanol, finally heated at temperatures 120, 140, 160 and 180oC for 6h in autoclave. The XRD, EDS and TEM confirmed that all of samples are crystalline and their particle size are 6, 6.5, 7 and 8 nm. The magnetic properties showed that the coercive force, the remanence of samples are about zero, the saturation magnetization Ms has values from 14.20 to 27.12 emu/g.

L3xLa2/3-XTiO3 Nanoparticles Obtained from a Low Temperature Synthesis Route

2011 ◽  
Vol 14 ◽  
pp. 105-111 ◽  
Author(s):  
Teobaldo Mariño Otero ◽  
Yodalgis Mosqueda Laffita ◽  
Carlos Ricardo Milian Pila ◽  
Eduardo Pérez Cappe
Keyword(s):  
Thermal Decomposition ◽  
Particle Size ◽  
Low Temperature ◽  
Chemical Compound ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis ◽  
Electrochemical Application ◽  
Citrate Precursor ◽  
Very Low Temperature

In this work, the synthesis of Li3xLa2/3-xTiO3 oxide is studied by thermal decomposition of citrate precursor at very low temperature which has not been yet reported in the literature for these compounds. The characterization of oxides and its precursor was realized by DRX, IR, ATD and TEM techniques. The results show the formation of a new chemical compound (precursor) as well as several advantages of the citrate method in relation to reported ones in the literature: the ostensible decreasing of temperature Li3xLa2/3-xTiO3 formation and the decreasing of particle size on the nanometric scale which is very desirable for the electrochemical application.

scholarly journals Low Temperature Synthesis of Hexagonal Shapedα-Al2O3Using a Solvothermal Method

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
A-Young Kim ◽  
Hyun Soo Kim ◽  
No-Kuk Park ◽  
Tae Jin Lee ◽  
Won Gun Lee ◽  
...  
Keyword(s):  
Particle Size ◽  
Low Temperature ◽  
Zeta Potential ◽  
Specific Surface ◽  
Acidic Solution ◽  
Solvothermal Method ◽  
Solvothermal Reaction ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis ◽  
Ph Conditions

This study demonstrates the low temperature synthesis ofα-Al2O3by solvothermal method using gibbsite alumina precursor in 1, 4-butanediol solvent according to various pH conditions. In acidic solution, an orthorhombic boehmite (AlOOH) structure was obtained after solvothermal reaction. A significant result in this study was that the solvothermally synthesized alumina inpH=9at 300 °C for 36 h represented a rhombohedralα-Al2O3structure hexagonal shaped with about 1.5~2.0 μm of particle size. Otherwise, theα-Al2O3structure was rather changed to the mixture of a boehmite andα-Al2O3structures abovepH=11. In the case ofα-Al2O3synthesized atpH=9, the specific surface area was 26.18 m2/g, and the particles that were stable in acidic solution resulted in 61.80 mV of zeta potential.

Low-Temperature Synthesis of PMnN-PZT Powders by Hybrid Method of Sol-Gel and Ultrasonic Atomization

2007 ◽  
Vol 280-283 ◽  
pp. 635-638
Author(s):  
Zh.J. Xu ◽  
Rui Qing Chu ◽  
Bao Shan Li ◽  
Guo Rong Li ◽  
Qing Rui Yin
Keyword(s):  
Particle Size ◽  
Low Temperature ◽  
Hybrid Method ◽  
Fine Particle ◽  
Sol Gel ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis ◽  
Ultrasonic Atomization ◽  
Fine Particle Size

Pb(Mn1/3Nb2/3)O3-Pb(Ti,Zr)O3 (PMnN-PZT) powders were synthesized by a hybrid method of sol-gel and ultrasonic atomization. The study shows that the resulting powder is pure, homogeneous and possesses a reasonably fine particle size. It is also believed to be applicable to other materials that can be processed via the technique.

Low temperature synthesis of nanosized NaY zeolite crystals from organic-free gel by using supported seeds

RSC Advances ◽  
2014 ◽  
Vol 4 (42) ◽  
pp. 21951-21957 ◽  
Author(s):  
T. F. Mastropietro ◽  
E. Drioli ◽  
T. Poerio
Keyword(s):  
Particle Size ◽  
Low Temperature ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Room Temperature ◽  
Nay Zeolite ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis ◽  
Organic Structure ◽  
Zeolite Crystals

Zeolite crystals having faujasite-type (FAU) topology and particle size distribution in the nanometer range have been successfully prepared by a room temperature, short duration synthesis, in the absence of organic structure directing agents (SDAs).

Low-temperature Synthesis and Characterizations of LaFeAsO Nanocrystals

2015 ◽  
Vol 30 (12) ◽  
pp. 1273
Author(s):  
ZHANG De-Xing ◽  
SUN Yun-Lei ◽  
ABULIMIT Abuduweli ◽  
CAO Guang-Han
Keyword(s):  
Low Temperature ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis
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