Solid state reactions in the system oxalate-bromate-chromium(III) oxide
TL;DR: In this paper, the thermal behavior of intimate mixtures comprising different mole ratios of Potassium oxalate, Potassium bromate and chromium(III) oxide was investigated.
About: This article is published in Thermochimica Acta.The article was published on 1995-09-15. It has received 3 citations till now. The article focuses on the topics: Potassium bromate & Bromate.
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TL;DR: Using two techniques of thermogravimetry and differential scanning calorimetry under O2 and N2 gas atmosphere from 25 to 600 °C, the thermal behavior of chromium(VI) oxide CrO3 was investigated.
Abstract: Using two techniques of thermogravimetry and differential scanning calorimetry under O2 and N2 gas atmosphere from 25 to 600 °C, the thermal behavior of chromium(VI) oxide CrO3 was investigated. The identity of products at different decomposition steps was confirmed by XRD technique. Both techniques produced similar results supporting the same steps for the compound. The received products were investigated by SEM electron microscope. The form and the size of crystals were investigated. Three distinct energy changes were observed, namely, two endothermic and one exothermic in DSC. The amount of ∆H for each peak is also reported.
10 citations
02 Nov 2020
TL;DR: In this article, the authors proposed a solid state synthesis of complex oxides via thermal decomposition process is proposed in order to obtain high dielectric permittivity and/or multiferroic.
Abstract: The renaissance of double molybdates is due to its applicability in different fields like laser, nonlinear optics and owing to their larger lanthanide admittance. The structural diversity of these crystals reflects a wide variety of physical properties. The recent quest for improved functional materials like high dielectric permittivity and/or multiferroic has shown upsurge in finding complex oxides. So, an attempt was made to synthesize these complex oxides i.e., Molybdates and double molybdates, with greater purity and higher yield. Though a few routes are available, the solid state synthesis of complex oxides via thermal decomposition process is proposed in this work. It was found that solid state synthesis paves a viable route for the synthesis of Molybdates, by taking required stoichiometric quantities of bromate and Molybdenum, and double molybdates by taking bromate, Lanthanum oxides (Ln: La, Nd, Dy, Gd) and Molybdenum oxide. The exothermicity of the decomposition of bromates was found to initiate the conversion of metal to its oxide and thereby leading to the formation of the desired products. The Molybdates obtained were also subjected for testing their antimicrobial activity to be used as a biomaterial.
1 citations
TL;DR: In this article , the effect of chromium carbide, the product of thermal carburisation of oxide that is formed as a protective layer of clad, on the thermal decomposition of oxohalate was investigated.
Abstract: The synergy has always led to the renaissance of production of many new substances but the same also has led to the decrease in the efficiency of many of the processes that has led to cause considerable changes. The chemistry of the fuel is one of those fields, which has seen greater effect for effecting the restructuring and redistribution of the fuel. Collaboration of solid state research with nuclear fuels has led to the improved technologies to be fostered inorder to reach the 100% efficacy. High temperatures and thermal gradients existing in the fuel acts as a driving force for many processes, resulting in interaction of the fuel with the substances like clad in nuclear reactor. So an attempt was made to study the effect of Chromium carbide, the product of thermal carburisation of oxide that is formed as a protective layer of clad, on the thermal decomposition of oxohalate. Also a comparative study of effect of chromium, its oxide and its carbide are presented in this paper.
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TL;DR: The No. 10123 1quart "Success" can as discussed by the authors dispenses solvent by finger pressure on the valve, which then closes upon release of the pressure, as indicated in the accompanying figure.
Abstract: use and allows it to dispense no more solvent than is needed when the swab-stick is dipped into it like a pen into an inkwell. Available in 4 oz., 6 oz., and 8 oz. sizes, the price ranges from $3. 50 to $3. 75. This same company also advertises a model No. 10123 1quart "Success" can which dispenses solvent by finger pressure on the valve, which then closes upon release of the pressure, as indicated in the accompanying figure. There is also a plunger can of I-pint size that dispenses solvent by pressure on the plunger. Price for the first type of can is about $8, for the second, about $7.
1,518 citations
TL;DR: In this article, the characteristic frequencies of 52 metals have been studied in the region 700-240 cm−1 and a particle size of 10 μ or smaller was found to give the best representative spectrum.
501 citations
TL;DR: In this article, the effect of additives on the thermal decomposition of halogen oxoacids was studied by gas-flow type DTA and X-ray diffraction of samples obtained in the course of the decomposition.
18 citations
TL;DR: In this article, thermal decomposition studies of intimate mixtures of different molar ratios of potassium nitrate and chromium(III) oxide were made by employing thermogravimetry differential thermal analysis, chemical analysis, infrared spectral measurements and X-ray powder diffraction patterns.
11 citations
TL;DR: In this article, 23 kinds of metal oxides were employed as catalysts for the decomposition of potassium chlorate, and they were classified into three groups, depending upon the catalytic performance.
Abstract: 23 kinds of metal oxides were employed as catalysts for the decomposition of potassium chlorate. These metal oxides were classified into 3 groups, depending upon the catalytic performance; in the first group are transition-metal oxides, which can decompose the chlorate around 380 o C. Rare-earth-metal oxides are in the second group, reducing the decomposition temperature to around 500 o C. The third group includes insulators such as alumina, silica, and magnesium oxide, which do not work as a catalyst for the chlorate decomposition
11 citations