scholarly journals Highly Dispersed Re-Doped CoAl2O4Nanopigments: Synthesis and Chromatic Properties

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Yuping Tong ◽  
Hailong Zhang ◽  
Shun Wang ◽  
Zheng Chen ◽  
Baixue Bian
Keyword(s):  
Solid Solution ◽  
Size Distribution ◽  
Complex Oxides ◽  
Combustion Method ◽  
Uniform Size ◽  
Highly Dispersed ◽  
Chemical Segregation ◽  
Segregation Phenomenon ◽  
Chromatic Properties ◽  
Uniform Size Distribution

Nanosized spinelCoAl2-xRexO4complex oxides were prepared by self-propagation combustion method. The products have been characterized by XRD, SEM, and EDS. The results indicated that Al3+can be partly replaced by Re3+when the doped amount is less than 10%, which forms single solid solution. The NIR reflectance and chromatic properties of samples have also been investigated. The substitution of Re3+for Al3+in CoAl2O4can increase the blueness of pigments. SEM results revealed that the obtainedCoAl2-xRexO4pigments consisted of highly dispersed spherical-like nanoparticles with uniform size distribution. EDS results indicated that the distribution of element was considerably uniform with no chemical segregation phenomenon.

scholarly journals Synthesis, Characterization, and NIR Reflectance of Highly Dispersed NiTiO3and NiTiO3/TiO2Composite Pigments

2016 ◽  
Vol 2016 ◽  
pp. 1-6 ◽  
Author(s):  
Yuping Tong ◽  
Jing Fu ◽  
Zheng Chen
Keyword(s):  
Diffuse Reflectance ◽  
Combustion Method ◽  
Spherical Particles ◽  
Optical Data ◽  
Uniform Size ◽  
Highly Dispersed ◽  
Nanometer Particles ◽  
Chromatic Properties ◽  
Uniform Size Distribution ◽  
Composite Samples

The highly dispersed nanostructured NiTiO3pigments and NiTiO3/TiO2composite pigments can be synthesized at relative low temperature. The activation energy of crystal growth of NiTiO3during calcinations via salt-assistant combustion method is 9.35 kJ/mol. The UV-vis spectra results revealed that the absorbance decreased with the increasing of calcinations temperature due to small size effect of nanometer particles. The optical data of NiTiO3nanocrystals were analyzed at the near-absorption edge. SEM showed that the obtained NiTiO3nanocrystals and NiTiO3/TiO2nanocomposite were composed of highly dispersed spherical-like and spherical particles with uniform size distribution, respectively. The chromatic properties and diffuse reflectance of samples were investigated. The obtained NiTiO3/TiO2composite samples have higher NIR reflectance than NiTiO3pigments.

Germanium dots with highly uniform size distribution grown on Si(100) substrate by molecular beam epitaxy

1997 ◽  
Vol 71 (24) ◽  
pp. 3543-3545 ◽  
Author(s):  
Xun Wang ◽  
Zui-min Jiang ◽  
Hai-jun Zhu ◽  
Fang Lu ◽  
Daming Huang ◽  
...  
Keyword(s):  
Molecular Beam Epitaxy ◽  
Size Distribution ◽  
Molecular Beam ◽  
Uniform Size ◽  
Highly Uniform ◽  
Uniform Size Distribution

Synthesis of LiCoO2 particles with tunable sizes by a urea-based-homogeneous-precipitation method

2020 ◽  
Vol 111 (4) ◽  
pp. 347-355
Author(s):  
Munekazu Motoyama ◽  
Hiroki Iwasaki ◽  
Miyuki Sakakura ◽  
Takayuki Yamamoto ◽  
Yasutoshi Iriyama
Keyword(s):  
Size Distribution ◽  
Average Diameter ◽  
Precipitation Method ◽  
Homogeneous Precipitation ◽  
Uniform Size ◽  
Homogeneous Precipitation Method ◽  
Wide Range ◽  
Size Uniformity ◽  
Average Size ◽  
Uniform Size Distribution

Abstract This paper reports the synthesis of monodisperse spherical LiCoO2 particles in a wide range of average diameter using a urea-based-uniform-precipitation method. The average diameter of LiCoO2 particles can be varied from 2 to 14 lm with a uniform size distribution. The effective approach to maintain the size uniformity while changing the average size of LiCoO2 particles is to keep the ratio of [CO(NH2)2] to [CoSO4] at 8 even when the CoSO4 and urea concentrations are changed.

Growth of highly uniform size-distribution ZnO NR arrays on sputtered ZnO thin film via hydrothermal with PMMA template assisted

2020 ◽  
Vol 105 ◽  
pp. 104736 ◽  
Author(s):  
Nantarat Srisuai ◽  
Sakoolkan Boonruang ◽  
Mati Horprathum ◽  
Pongsak Sarapukdee ◽  
Somyod Denchitcharoen
Keyword(s):  
Thin Film ◽  
Size Distribution ◽  
Zno Thin Film ◽  
Uniform Size ◽  
Highly Uniform ◽  
Uniform Size Distribution

Preparation of TiO2 Nanopowders by Non-Hydrolytic Sol−Gel and Solvothermal Synthesis

2011 ◽  
Vol 110-116 ◽  
pp. 1934-1939
Author(s):  
Yan Xiang Wang ◽  
Min Xu ◽  
Jian Sun
Keyword(s):  
Size Distribution ◽  
Solvothermal Synthesis ◽  
Solvothermal Method ◽  
Sol Gel ◽  
Rutile Phase ◽  
Uniform Size ◽  
Oxygen Donor ◽  
Method Effects ◽  
Sol Gel Synthesis ◽  
Uniform Size Distribution

TiO2nanopowders were synthesized by non-hydrolytic sol−gel synthesis and solvothermal method. Effects of the type of alcohol on the properties of TiO2nanopowders were investigated. XRD and FSEM were used to characterize TiO2nanopowders. The results showed that TiO2nanopowders with diameters of about 50nm and micro-spheres with diameters of about 400~500nm were obtained by non-hydrolytic sol−gel synthesis, when ethanol and isopropanol were used as oxygen donor and solvent, respectively. TiO2prepared with ethanol by non-hydrolytic sol−gel synthesis and calcined at 700°C consisted only 3.8% rutile phase. After solvothermal synthesis, TiO2nanopowders with diameters of about 50nm were obtained when ethanol and isopropanol were used as the oxygen donor. However, submicrometer spheres with uniform size distribution were obtained with 1-octanol.

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