Synthesis of Cr-Doped Sphene Ceramic Pigments by Spray Drying

2006 ◽  
Vol 45 ◽  
pp. 272-275 ◽  
Author(s):  
T. Stoyanova ◽  
F. Matteucci ◽  
Anna L. Costa ◽  
M. Dondi ◽  
F.J. Carda
Keyword(s):  
Spray Drying ◽  
Thermal Evolution ◽  
Ceramic Pigments ◽  
Drying Process ◽  
Colorimetric Analysis ◽  
Powder Morphology ◽  
Ceramic Method ◽  
X Ray ◽  
State Process ◽  
Cielab System

Ceramic pigments with Cr-doped sphene structure (CaSn1-xCrxSiO5, CaTi1-xCrxSiO5) were synthesized by both spray drying an aqueous solution of precursor salts plus further calcining the resulting powders and conventional ceramic method. The thermal evolution of products was studied by X-Ray Powder Diffraction (XRPD). The powder morphology and chemical composition were analyzed by SEM-EDX. The color efficiency of pigments was evaluated by colorimetric analysis (CIELab system). Results showed that the spray drying process decreased the maximum firing temperature and increased the color efficiency of Cr-doped sphene pigments therefore enhancing a higher reactivity of powders compared with the solid state process.

Effect of foam spray drying process parameters on powder morphology

2018 ◽  
Vol 37 (5) ◽  
pp. 535-545 ◽  
Author(s):  
Artur Lewandowski ◽  
Maciej Jaskulski ◽  
Ireneusz Zbiciński
Keyword(s):  
Spray Drying ◽  
Process Parameters ◽  
Drying Process ◽  
Powder Morphology

scholarly journals Preparation of BaZrO3 powders by a spray-drying process

2003 ◽  
Vol 18 (6) ◽  
pp. 1325-1332 ◽  
Author(s):  
B. Robertz ◽  
F. Boschini ◽  
A. Rulmont ◽  
R. Cloots ◽  
I. Vandriessche ◽  
...  
Keyword(s):  
Spray Drying ◽  
Precursor Solution ◽  
Barium Zirconate ◽  
Drying Process ◽  
X Ray Diffraction ◽  
High Quality ◽  
Corrosion Resistant ◽  
X Ray ◽  
Potential Use ◽  
Scanning Electron

The potential use of barium zirconate for the manufacture of corrosion-resistant substrates emphasizes the need for a simple, inexpensive, and easily scalable process to produce high-quality powders with well-controlled composition and properties. However, the classical solid-state preparation of barium zirconate leads to an inhomogeneous powder unsuitable for applications in highly corrosive environment. For this paper, the possibility to use the spray-drying technique for the preparation of BaZrO3 powders with a controlled size distribution and morphology was investigated. The influence of the nature and concentration of the precursor solution and the influence of the spray-drying step are discussed on the basis of x-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, and dilatometric measurements.

Heterocoagulation-spray drying process for the inclusion of ceramic pigments

2008 ◽  
Vol 28 (1) ◽  
pp. 169-176 ◽  
Author(s):  
A.L. Costa ◽  
F. Matteucci ◽  
M. Dondi ◽  
I. Zama ◽  
S. Albonetti ◽  
...  
Keyword(s):  
Spray Drying ◽  
Ceramic Pigments ◽  
Drying Process

Synthesis of the Nanocrystalline/Nanosized NiFe2O4 Powder by Ceramic Method and Mechanical Milling

2012 ◽  
Vol 188 ◽  
pp. 27-30 ◽  
Author(s):  
Vasile Florin Tarța ◽  
Ionel Chicinaş ◽  
Traian Florin Marinca ◽  
Bogdan Viorel Neamţu ◽  
Florin Popa ◽  
...  
Keyword(s):  
Milling Time ◽  
High Energy ◽  
Milling Process ◽  
X Ray Diffraction ◽  
Polycrystalline Nickel ◽  
Powder Morphology ◽  
Chemical Homogeneity ◽  
Ceramic Method ◽  
X Ray ◽  
Nanometric Range

The polycrystalline nickel ferrite - NiFe2O4has been obtained by ceramic route starting from a stoichiometric mixture of oxides (NiO and α-Fe2O3powders). The obtained NiFe2O4was subjected to high energy ball milling. The formation of NiFe2O4by ceramic method and also the evolution of the powder during milling were studied by X-ray diffraction. The mean crystallite size of the NiFe2O4continuously decreases with the increasing of the milling time and for all the milling time it is in nanometric range. The particles sizes are drastically reduced by milling process. For the milled samples, the particles size is ranging from tens of microns to few nanometers. The powder morphology and local chemical homogeneity were investigated by scanning electron microscopy (SEM) and respectively by energy dispersive x-ray spectrometry (EDX).

The Effects of Extinction on X-Ray Powder Diffraction Intensities

1986 ◽  
Vol 30 ◽  
pp. 447-456 ◽  
Author(s):  
Janies P. Cline ◽  
Robert L. Snyder
Keyword(s):  
Spray Drying ◽  
Powder Diffraction ◽  
Preferred Orientation ◽  
Drying Process ◽  
Statistical Nature ◽  
X Ray ◽  
Intensity Measurements

Several factors have long been known to affect the intensity measurements of X-ray powder diffraction. The characterization of these effects has been impeded by difficulties in their isolation and the statistical nature of the data in which they manifest themselves. The most celebrated, and most detrimental, of the these effects is that of preferred orientation. This error can be eliminated with the spherical agglomeration of the sample (1). The spray drying process offers this result and is considered to have the broadest range of applicability to materials encountered by the powder diffractionist.

Prepare Uniformity Superfine WO3 by Spray Drying

2011 ◽  
Vol 399-401 ◽  
pp. 731-735 ◽  
Author(s):  
Jian Hua Liu ◽  
Tao Huang ◽  
Huan Ran Zhang ◽  
Rui Xiang Wang
Keyword(s):  
Electron Microscopy ◽  
Particle Size ◽  
Spray Drying ◽  
High Purity ◽  
Rotational Speed ◽  
Concentration Ratio ◽  
Size Structure ◽  
Drying Process ◽  
X Ray ◽  
Structure And Morphology

Precursor of tungsten was obtained by spray drying process with high purity APT crystal liquor as material. The precursor was analysized by electron microscopy and X-ray. A suitable spray drying process was found through the morphology and powder structure. The influence of atomization disk rotational speed, the concentration ratio of ammonia to WO3 in APT liquor and APT liquor’s concentration on particle size, structure and morphology of the ball precursor were studied. Uniformity superfine WO3 was obtained from precursor by calcined.

Synthesis of V-ZrSiO4 Blue Ceramic Pigments

2010 ◽  
Vol 658 ◽  
pp. 105-108
Author(s):  
Kyu Ri Pyon ◽  
Byung Ha Lee
Keyword(s):  
Sodium Fluoride ◽  
Ceramic Pigments ◽  
Colour Properties ◽  
Monoclinic Zirconia ◽  
X Ray Diffraction ◽  
Ceramic Method ◽  
X Ray ◽  
Vis Spectroscopy

Vanadium doped zircon pigments were prepared by ceramic method from mixture of monoclinic zirconia and silica and sodium fluoride as mineralizer on the colour properties of the pigments was also investigated. The colour of synthesized pigments observed in the absence and the presence of the NaF was green and blue, respectively. They were characterized by X-ray diffraction and UV-Vis spectroscopy.

The Effect of Inlet Temperature on the Wall Temperature Behavior of Salt Powders Produced by Spray-Drying

2012 ◽  
Vol 550-553 ◽  
pp. 704-708 ◽  
Author(s):  
Cherdpong Chiawchanwattana ◽  
Kittichai Triratanasirichai
Keyword(s):  
Spray Drying ◽  
Wall Temperature ◽  
Prediction Equation ◽  
Temperature Behavior ◽  
Inlet Temperature ◽  
Deposition Flux ◽  
Temperature Profiles ◽  
Drying Process ◽  
State Process ◽  
Significant Difference

This research is concerned with the experimental study of the wall temperature behavior of salt powders in the spray-drying process under various inlet temperatures. The results are presented and discussed in terms of the temperature profiles within two sections of the drying chamber that consists of cylindrical and conical sections. Firstly, the temperature profiles of cylindrical section have shown that the behavior from the steps of spraying air, water, and solution before has lead to a steady state process. Finally, the wall temperature distribution at each elevation has shown a statistically significant difference. In our future work, the wall temperature behavior will be compared with the wall deposition flux in order to determine a prediction equation that can be applied to manage the deposition problem in the spray-drying process stage.

Characterizations of Synthetic 8mol% YSZ with Comparison to 3mol %YSZ for HT-SOFC

2020 ◽  
Vol 38 (4A) ◽  
pp. 491-500
Author(s):  
Abeer F. Al-Attar ◽  
Saad B. H. Farid ◽  
Fadhil A. Hashim
Keyword(s):  
Ionic Conductivity ◽  
Electrochemical Impedance ◽  
Structural Information ◽  
Impedance Analysis ◽  
High Energy ◽  
Yttria Stabilized Zirconia ◽  
X Ray Diffraction ◽  
Stabilized Zirconia ◽  
Powder Morphology ◽  
X Ray

In this work, Yttria (Y2O3) was successfully doped into tetragonal 3mol% yttria stabilized Zirconia (3YSZ) by high energy-mechanical milling to synthesize 8mol% yttria stabilized Zirconia (8YSZ) used as an electrolyte for high temperature solid oxide fuel cells (HT-SOFC). This work aims to evaluate the densification and ionic conductivity of the sintered electrolytes at 1650°C. The bulk density was measured according to ASTM C373-17. The powder morphology and the microstructure of the sintered electrolytes were analyzed via Field Emission Scanning Electron Microscopy (FESEM). The chemical analysis was obtained with Energy-dispersive X-ray spectroscopy (EDS). Also, X-ray diffraction (XRD) was used to obtain structural information of the starting materials and the sintered electrolytes. The ionic conductivity was obtained through electrochemical impedance spectroscopy (EIS) in the air as a function of temperatures at a frequency range of 100(mHz)-100(kHz). It is found that the 3YSZ has a higher density than the 8YSZ. The impedance analysis showed that the ionic conductivity of the prepared 8YSZ at 800°C is0.906 (S.cm) and it was 0.214(S.cm) of the 3YSZ. Besides, 8YSZ has a lower activation energy 0.774(eV) than that of the 3YSZ 0.901(eV). Thus, the prepared 8YSZ can be nominated as an electrolyte for the HT-SOFC.

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