The Experts below are selected from a list of 195 Experts worldwide ranked by ideXlab platform
Petra Šulcová - One of the best experts on this subject based on the ideXlab platform.
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Synthesis and study of mixed oxide Inorganic Pigment from Bi2O3–ZnO–CeO2 system
Journal of Thermal Analysis and Calorimetry, 2017Co-Authors: Kateřina Těsitelova, Petra ŠulcováAbstract:Novel environment-friendly yellow mixed oxide Inorganic Pigment from Bi2O3–ZnO–CeO2 system with the composition 23 mol% Bi2O3, 15 mol% ZnO and 62 mol% CeO2 was successfully synthesized by a conventional solid-state reaction method. Comprehensive analyses were carried out to characterize the develop Pigment powder including simultaneous TG–DTA thermal analysis, colour properties and particle size distribution. The results demonstrated that the optimum calcination for Pigment synthesis was located at a range 800–950 °C. The colour of the studied mixed oxide Pigment is connected with the calcination condition. The substitution of Zn2+ changes the colour from orange to yellow. The colour of the obtained samples was dependent on the calcination condition and the particle size distribution. The most saturated yellow hue was obtained at the calcination temperature of 950 °C for 2 h in a furnace of pure air and after its application into organic binder in mass tone. The value C of this sample was approx. 65. The mixed oxide Pigments were also evaluated from the standpoint of their particle size distribution. Bi2Ce2O7 is considered to be a non-toxic compound, and the other component (Zn2+ ions) is also the safe element. Therefore, the present mixed oxide could be an attractive candidate as a novel environment-friendly Inorganic yellow Pigment.
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synthesis and study of mixed oxide Inorganic Pigment from bi2o3 zno ceo2 system
Journal of Thermal Analysis and Calorimetry, 2017Co-Authors: Kateřina Těsitelova, Petra ŠulcováAbstract:Novel environment-friendly yellow mixed oxide Inorganic Pigment from Bi2O3–ZnO–CeO2 system with the composition 23 mol% Bi2O3, 15 mol% ZnO and 62 mol% CeO2 was successfully synthesized by a conventional solid-state reaction method. Comprehensive analyses were carried out to characterize the develop Pigment powder including simultaneous TG–DTA thermal analysis, colour properties and particle size distribution. The results demonstrated that the optimum calcination for Pigment synthesis was located at a range 800–950 °C. The colour of the studied mixed oxide Pigment is connected with the calcination condition. The substitution of Zn2+ changes the colour from orange to yellow. The colour of the obtained samples was dependent on the calcination condition and the particle size distribution. The most saturated yellow hue was obtained at the calcination temperature of 950 °C for 2 h in a furnace of pure air and after its application into organic binder in mass tone. The value C of this sample was approx. 65. The mixed oxide Pigments were also evaluated from the standpoint of their particle size distribution. Bi2Ce2O7 is considered to be a non-toxic compound, and the other component (Zn2+ ions) is also the safe element. Therefore, the present mixed oxide could be an attractive candidate as a novel environment-friendly Inorganic yellow Pigment.
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Synthesis and study of Bi2Ce2O7 as Inorganic Pigment
Journal of Thermal Analysis and Calorimetry, 2016Co-Authors: Kateřina Těšitelová, Petra ŠulcováAbstract:This research is focused on the synthesis, characterization and optical properties of novel environmentally friendly Inorganic Pigment Bi2Ce2O7. Powder sample was prepared by the conventional ceramic method, i.e. solid-state reaction. Prepared Pigments were applied into organic matrix in mass tone and ceramic glaze. Thermal behaviour of the reaction mixture was investigated using differential thermal and thermogravimetric analyses. The optimum conditions for synthesis of the compound were determined. The Pigment Bi2Ce2O7 was evaluated from standpoint of its structure, colour and particle sizes. The phase composition of the product was studied by X-ray diffraction analysis. Colourimetric parameters were evaluated by measuring the reflectance in the visible region of light. The resulting colour hue of studied Pigment in an organic binder is yellow to yellow orange, depending on the calcination temperature. Characterization of Bi2Ce2O7 Pigment suggests that it has a potential to be alternative yellow or yellow-orange colourant for paint, plastics, ceramics and building materials.
J Gopalakrishnan - One of the best experts on this subject based on the ideXlab platform.
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yga1 xmnxo3 a novel purple Inorganic Pigment
RSC Advances, 2013Co-Authors: S Tamilarasan, Debajit Sarma, M L P Reddy, Srinivasan Natarajan, J GopalakrishnanAbstract:A purple Inorganic Pigment, YGa1−xMnxO3 (0 < x ≤ 0.10), based on hexagonal YGaO3 is reported here. The metastable series of oxides were prepared by a sol–gel technique where the dried gels, obtained from aqueous solutions of metal nitrate–citric acid mixtures, were calcined for a short duration in a preheated furnace around 850 °C. The purple colour of the oxides arises from the specific trigonal bipyramidal ligand field around MnIII in a YGaO3 host. Other hexagonal RGaO3 hosts for R = Lu, Tm and Ho substituted with MnIII also produce similar purple coloured materials.
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YGa1−xMnxO3: A novel purple Inorganic Pigment
RSC Advances, 2013Co-Authors: S Tamilarasan, Debajit Sarma, M L P Reddy, Srinivasan Natarajan, J GopalakrishnanAbstract:A purple Inorganic Pigment, YGa1−xMnxO3 (0 < x ≤ 0.10), based on hexagonal YGaO3 is reported here. The metastable series of oxides were prepared by a sol–gel technique where the dried gels, obtained from aqueous solutions of metal nitrate–citric acid mixtures, were calcined for a short duration in a preheated furnace around 850 °C. The purple colour of the oxides arises from the specific trigonal bipyramidal ligand field around MnIII in a YGaO3 host. Other hexagonal RGaO3 hosts for R = Lu, Tm and Ho substituted with MnIII also produce similar purple coloured materials.
S Tamilarasan - One of the best experts on this subject based on the ideXlab platform.
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yga1 xmnxo3 a novel purple Inorganic Pigment
RSC Advances, 2013Co-Authors: S Tamilarasan, Debajit Sarma, M L P Reddy, Srinivasan Natarajan, J GopalakrishnanAbstract:A purple Inorganic Pigment, YGa1−xMnxO3 (0 < x ≤ 0.10), based on hexagonal YGaO3 is reported here. The metastable series of oxides were prepared by a sol–gel technique where the dried gels, obtained from aqueous solutions of metal nitrate–citric acid mixtures, were calcined for a short duration in a preheated furnace around 850 °C. The purple colour of the oxides arises from the specific trigonal bipyramidal ligand field around MnIII in a YGaO3 host. Other hexagonal RGaO3 hosts for R = Lu, Tm and Ho substituted with MnIII also produce similar purple coloured materials.
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YGa1−xMnxO3: A novel purple Inorganic Pigment
RSC Advances, 2013Co-Authors: S Tamilarasan, Debajit Sarma, M L P Reddy, Srinivasan Natarajan, J GopalakrishnanAbstract:A purple Inorganic Pigment, YGa1−xMnxO3 (0 < x ≤ 0.10), based on hexagonal YGaO3 is reported here. The metastable series of oxides were prepared by a sol–gel technique where the dried gels, obtained from aqueous solutions of metal nitrate–citric acid mixtures, were calcined for a short duration in a preheated furnace around 850 °C. The purple colour of the oxides arises from the specific trigonal bipyramidal ligand field around MnIII in a YGaO3 host. Other hexagonal RGaO3 hosts for R = Lu, Tm and Ho substituted with MnIII also produce similar purple coloured materials.
I S Ahmed - One of the best experts on this subject based on the ideXlab platform.
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near infrared reflecting blue Inorganic nano Pigment based on cobalt aluminate spinel via combustion synthesis method
Dyes and Pigments, 2018Co-Authors: El E Fadaly, I S AhmedAbstract:Abstract CoAl2O4 nanoparticles as a high NIR solar reflectance Inorganic Pigment was successfully prepared by combustion synthesis using glycine, malonic acid dihydrazide as a simple fuel and mixture of them with different molar ratio, following by annealing in temperature range of 400–1000 °C. As-prepared and annealed products characterized by using various tools such as TGA/DTA, XRD, HRTEM, EDX, DRS, FTIR. The color of products was studied using CIE1978 L∗a∗b∗ colorimetric method. In addition, the solar reflectance was determined by using (JIS) standard k5602-2008. The obtained results referred that powder product exhibits a high solar reflectance with value 38.18% in UV–Visible region, 51.82% in NIR region and total solar reflectance was 43.7% and the optical band gap of products was determined. The blue Pigments on glaze give a maximum NIR solar reflectance in range of 61.3–69.08%. These results demonstrate the prepared products are a suitable as cool blue Inorganic Pigments on glaze.
Debajit Sarma - One of the best experts on this subject based on the ideXlab platform.
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yga1 xmnxo3 a novel purple Inorganic Pigment
RSC Advances, 2013Co-Authors: S Tamilarasan, Debajit Sarma, M L P Reddy, Srinivasan Natarajan, J GopalakrishnanAbstract:A purple Inorganic Pigment, YGa1−xMnxO3 (0 < x ≤ 0.10), based on hexagonal YGaO3 is reported here. The metastable series of oxides were prepared by a sol–gel technique where the dried gels, obtained from aqueous solutions of metal nitrate–citric acid mixtures, were calcined for a short duration in a preheated furnace around 850 °C. The purple colour of the oxides arises from the specific trigonal bipyramidal ligand field around MnIII in a YGaO3 host. Other hexagonal RGaO3 hosts for R = Lu, Tm and Ho substituted with MnIII also produce similar purple coloured materials.
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YGa1−xMnxO3: A novel purple Inorganic Pigment
RSC Advances, 2013Co-Authors: S Tamilarasan, Debajit Sarma, M L P Reddy, Srinivasan Natarajan, J GopalakrishnanAbstract:A purple Inorganic Pigment, YGa1−xMnxO3 (0 < x ≤ 0.10), based on hexagonal YGaO3 is reported here. The metastable series of oxides were prepared by a sol–gel technique where the dried gels, obtained from aqueous solutions of metal nitrate–citric acid mixtures, were calcined for a short duration in a preheated furnace around 850 °C. The purple colour of the oxides arises from the specific trigonal bipyramidal ligand field around MnIII in a YGaO3 host. Other hexagonal RGaO3 hosts for R = Lu, Tm and Ho substituted with MnIII also produce similar purple coloured materials.