Li ion beam irradiation persuaded modifications in the thermodynamic properties of liquid crystalline material 4-n (hexyloxy) benzoic acid (HOBA) have been investigated. The irradiation has been carried out by a pelletron beam using 3 nA current at fluences (1010, 1011, 1012, 1013 ions∕cm2) at room temperature in the crystalline phase of the material. The pure and irradiated liquid crystalline material has a phase sequence of I-N-Cr. The pure and irradiated materials were explored using differential scanning calorimeter (DSC). Thermodynamic studies of the pure and irradiated materials reveal that all the transition temperature is depressed as compared to those of pure materials by the Li ion beam irradiation. The average transition enthalpies and entropies of the irradiated materialare increased as compared to those of purematerial.Li ion beam irradiation persuaded modifications in the thermodynamic properties of liquid crystalline material 4-n (hexyloxy) benzoic acid (HOBA) have been investigated. The irradiation has been carried out by a pelletron beam using 3 nA current at fluences (1010, 1011, 1012, 1013 ions∕cm2) at room temperature in the crystalline phase of the material. The pure and irradiated liquid crystalline material has a phase sequence of I-N-Cr. The pure and irradiated materials were explored using differential scanning calorimeter (DSC). Thermodynamic studies of the pure and irradiated materials reveal that all the transition temperature is depressed as compared to those of pure materials by the Li ion beam irradiation. The average transition enthalpies and entropies of the irradiated materialare increased as compared to those of purematerial.
{"title":"Changes in the thermodynamic properties of 4-n(hexyloxy) benzoic acid by Li+3 ion beam irradiation","authors":"Satendra Kumar, R. Verma, R. Dhar, A. Tripathi","doi":"10.1063/1.5122331","DOIUrl":"https://doi.org/10.1063/1.5122331","url":null,"abstract":"Li ion beam irradiation persuaded modifications in the thermodynamic properties of liquid crystalline material 4-n (hexyloxy) benzoic acid (HOBA) have been investigated. The irradiation has been carried out by a pelletron beam using 3 nA current at fluences (1010, 1011, 1012, 1013 ions∕cm2) at room temperature in the crystalline phase of the material. The pure and irradiated liquid crystalline material has a phase sequence of I-N-Cr. The pure and irradiated materials were explored using differential scanning calorimeter (DSC). Thermodynamic studies of the pure and irradiated materials reveal that all the transition temperature is depressed as compared to those of pure materials by the Li ion beam irradiation. The average transition enthalpies and entropies of the irradiated materialare increased as compared to those of purematerial.Li ion beam irradiation persuaded modifications in the thermodynamic properties of liquid crystalline material 4-n (hexyloxy) benzoic acid (HOBA) have been investigated. The irradiation has been carried out by a pelletron beam using 3 nA current at fluences (1010, 1011, 1012, 1013 ions∕cm2) at room temperature in the crystalline phase of the material. The pure and irradiated liquid crystalline material has a phase sequence of I-N-Cr. The pure and irradiated materials were explored using differential scanning calorimeter (DSC). Thermodynamic studies of the pure and irradiated materials reveal that all the transition temperature is depressed as compared to those of pure materials by the Li ion beam irradiation. The average transition enthalpies and entropies of the irradiated materialare increased as compared to those of purematerial.","PeriodicalId":7262,"journal":{"name":"ADVANCES IN BASIC SCIENCE (ICABS 2019)","volume":"100 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85869646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A new chiral derivatizing reagent, (S)-naproxen (Npx) benzotriazole ester, has been synthesized and it was characterized by UV, IR, 1HNMR, elemental analysis and polarimetric studies. It was used a...
{"title":"Synthesis of (S)-naproxen based amide bond forming chiral reagent and application for liquid chromatographic resolution of (RS)-salbutamol","authors":"Poonam Malik, R. Bhushan","doi":"10.1063/1.5122389","DOIUrl":"https://doi.org/10.1063/1.5122389","url":null,"abstract":"A new chiral derivatizing reagent, (S)-naproxen (Npx) benzotriazole ester, has been synthesized and it was characterized by UV, IR, 1HNMR, elemental analysis and polarimetric studies. It was used a...","PeriodicalId":7262,"journal":{"name":"ADVANCES IN BASIC SCIENCE (ICABS 2019)","volume":"45 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75736578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
P. K. Ingalagondi, Omnath Patil, G. Shivaraj, T. Sankarappa, S. M. Hanagodimath
The effect of solvents on absorption and fluorescence spectra of a newly synthesized coumarin laser dye namely; 6-Methoxy-4 (2-Methoxy methyl) –Chromen-2 one (2-MMC) has been studied in different solvents at room temperature (300 K). Ground and excited state dipole moments were estimated using Lippert’s Bakhshiev’s and Kawski- Chamma-Violet’s equations. It is found that the ground state dipole moment is less than that of excited state dipole moment.The effect of solvents on absorption and fluorescence spectra of a newly synthesized coumarin laser dye namely; 6-Methoxy-4 (2-Methoxy methyl) –Chromen-2 one (2-MMC) has been studied in different solvents at room temperature (300 K). Ground and excited state dipole moments were estimated using Lippert’s Bakhshiev’s and Kawski- Chamma-Violet’s equations. It is found that the ground state dipole moment is less than that of excited state dipole moment.
溶剂对新合成香豆素激光染料吸收光谱和荧光光谱的影响研究了6-甲氧基-4(2-甲氧基甲基)- chromen2 - one (2-MMC)在不同溶剂下的室温(300 K)反应。基态和激发态偶极矩用利珀特的巴赫希耶夫方程和考夫斯基-查马-维奥莱特方程估计。发现基态偶极矩小于激发态偶极矩。溶剂对新合成香豆素激光染料吸收光谱和荧光光谱的影响研究了6-甲氧基-4(2-甲氧基甲基)- chromen2 - one (2-MMC)在不同溶剂下的室温(300 K)反应。基态和激发态偶极矩用利珀特的巴赫希耶夫方程和考夫斯基-查马-维奥莱特方程估计。发现基态偶极矩小于激发态偶极矩。
{"title":"Solvent effect on the spectral properties of coumarin laser dye: Estimation of ground and excited state dipole moments","authors":"P. K. Ingalagondi, Omnath Patil, G. Shivaraj, T. Sankarappa, S. M. Hanagodimath","doi":"10.1063/1.5122541","DOIUrl":"https://doi.org/10.1063/1.5122541","url":null,"abstract":"The effect of solvents on absorption and fluorescence spectra of a newly synthesized coumarin laser dye namely; 6-Methoxy-4 (2-Methoxy methyl) –Chromen-2 one (2-MMC) has been studied in different solvents at room temperature (300 K). Ground and excited state dipole moments were estimated using Lippert’s Bakhshiev’s and Kawski- Chamma-Violet’s equations. It is found that the ground state dipole moment is less than that of excited state dipole moment.The effect of solvents on absorption and fluorescence spectra of a newly synthesized coumarin laser dye namely; 6-Methoxy-4 (2-Methoxy methyl) –Chromen-2 one (2-MMC) has been studied in different solvents at room temperature (300 K). Ground and excited state dipole moments were estimated using Lippert’s Bakhshiev’s and Kawski- Chamma-Violet’s equations. It is found that the ground state dipole moment is less than that of excited state dipole moment.","PeriodicalId":7262,"journal":{"name":"ADVANCES IN BASIC SCIENCE (ICABS 2019)","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80099716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Synthesis and structural characterization of powdered (La1.2Sr0.8)InMnO6 were made using the coprecipitation method. The prepared samples have a orthorhombic structure corresponding to the space group P n m a (62). X-Ray diffraction and full pattern fitting through Rietveld method were used for structural characterization. The Wyckoff positions, discrepancy factor and inter-atomic distance have been calculated. Some of the applications of nanosized (La1.2Sr0.8)InMnO6 have also been highlighted.
采用共沉淀法合成了粉状(La1.2Sr0.8)InMnO6，并对其结构进行了表征。所制备的样品具有与空间群P n m a(62)对应的正交结构。通过x射线衍射和Rietveld方法进行全模式拟合进行结构表征。计算了Wyckoff位置、差异因子和原子间距离。本文还重点介绍了纳米(La1.2Sr0.8)InMnO6的一些应用。
{"title":"Rietveld refinement and structural characterization of (La1.2Sr0.8) InMnO6 nanopowders synthesized by coprecipitation method","authors":"Preeti, Sunil Rohilla","doi":"10.1063/1.5122589","DOIUrl":"https://doi.org/10.1063/1.5122589","url":null,"abstract":"Synthesis and structural characterization of powdered (La1.2Sr0.8)InMnO6 were made using the coprecipitation method. The prepared samples have a orthorhombic structure corresponding to the space group P n m a (62). X-Ray diffraction and full pattern fitting through Rietveld method were used for structural characterization. The Wyckoff positions, discrepancy factor and inter-atomic distance have been calculated. Some of the applications of nanosized (La1.2Sr0.8)InMnO6 have also been highlighted.","PeriodicalId":7262,"journal":{"name":"ADVANCES IN BASIC SCIENCE (ICABS 2019)","volume":"138 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73750296","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The oxidative polymerization process has been used to prepare composites of Polyaniline/iron oxide (PANI/Fe2O3). For synthesis of these composites, Polyaniline using different amounts (10, 20, 30, 40, 50 wt %) of the Fe2O3 with oxidant ammonium persulphate have been used. Temperature dependent dc conductivity measurement is done in temperature range upto 120°C using Mott’s model. Mott’s model explains the conduction by hopping process in disordered semiconducting systems and match well with the experimental data.
{"title":"Study of DC electrical properties of iron oxide doped polyaniline","authors":"Smriti Sharma, S. Goyal, R. Pal","doi":"10.1063/1.5122551","DOIUrl":"https://doi.org/10.1063/1.5122551","url":null,"abstract":"The oxidative polymerization process has been used to prepare composites of Polyaniline/iron oxide (PANI/Fe2O3). For synthesis of these composites, Polyaniline using different amounts (10, 20, 30, 40, 50 wt %) of the Fe2O3 with oxidant ammonium persulphate have been used. Temperature dependent dc conductivity measurement is done in temperature range upto 120°C using Mott’s model. Mott’s model explains the conduction by hopping process in disordered semiconducting systems and match well with the experimental data.","PeriodicalId":7262,"journal":{"name":"ADVANCES IN BASIC SCIENCE (ICABS 2019)","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90699886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Considerable as well as thriving demand and challenges of transportation industry such as cost cutting measures, new environmental conservation regulations and the impressive growth in terms of transport volumes open windows for ingenious joining technologies for new materials that possess high fracture toughness, better environmental resistance characteristics and recyclability. But materials and their conversion into products play the major role in the applicability. Escalation of thermoplastic usage in large structural components also faces similar ambiguity for joining multi-material structures. Friction assisted riveting technology called ‘Friction riveting’ is the cogent joining technology in tackling these challenges. Processing of materials is the key research area where the required outcomes are expected in terms of performance, strength and durability. Typical studies are discussed in this review article. A study on the influences and impacts of process parameters such as rotational speed is presented in this paper which provides a new gateway for the further betterments.
{"title":"Friction riveting for joining of wide range of dissimilar materials","authors":"R. Sankaranarayanan, N. Hynes","doi":"10.1063/1.5122553","DOIUrl":"https://doi.org/10.1063/1.5122553","url":null,"abstract":"Considerable as well as thriving demand and challenges of transportation industry such as cost cutting measures, new environmental conservation regulations and the impressive growth in terms of transport volumes open windows for ingenious joining technologies for new materials that possess high fracture toughness, better environmental resistance characteristics and recyclability. But materials and their conversion into products play the major role in the applicability. Escalation of thermoplastic usage in large structural components also faces similar ambiguity for joining multi-material structures. Friction assisted riveting technology called ‘Friction riveting’ is the cogent joining technology in tackling these challenges. Processing of materials is the key research area where the required outcomes are expected in terms of performance, strength and durability. Typical studies are discussed in this review article. A study on the influences and impacts of process parameters such as rotational speed is presented in this paper which provides a new gateway for the further betterments.","PeriodicalId":7262,"journal":{"name":"ADVANCES IN BASIC SCIENCE (ICABS 2019)","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79063081","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
VO2(B) has been successfully synthesized via one step hydrothermal process using vanadium source as V2O5 and 2-Hydroxypropane-1,2,3-tricarboxylic acid as reducing and structure directing agent at 230°C for 24 hr. The product compound was analysed through X-ray diffraction (XRD) and scanning electron microscopy (SEM), and its physicochemical properties are characterized by FTIR and UV-VIS spectroscopy. The obtained VO2 (B) nanoparticles are under 10nm with optical band gap of 2.67eV. Thin film of VO2 (B) nanoparticles was deposited on ITO substrate was electrochemically characterized by cyclic voltammetry. The electrochemical characterizations have revealed reversible redox behavior which corresponds to the reversible lithium intercalation/deintercalation.VO2(B) has been successfully synthesized via one step hydrothermal process using vanadium source as V2O5 and 2-Hydroxypropane-1,2,3-tricarboxylic acid as reducing and structure directing agent at 230°C for 24 hr. The product compound was analysed through X-ray diffraction (XRD) and scanning electron microscopy (SEM), and its physicochemical properties are characterized by FTIR and UV-VIS spectroscopy. The obtained VO2 (B) nanoparticles are under 10nm with optical band gap of 2.67eV. Thin film of VO2 (B) nanoparticles was deposited on ITO substrate was electrochemically characterized by cyclic voltammetry. The electrochemical characterizations have revealed reversible redox behavior which corresponds to the reversible lithium intercalation/deintercalation.
{"title":"Hydrothermal synthesis, spectroscopic, optical and electrochemical characterization of vanadium dioxide nanostructures","authors":"Meenu, Bharti, B. S. Dehiya","doi":"10.1063/1.5122591","DOIUrl":"https://doi.org/10.1063/1.5122591","url":null,"abstract":"VO2(B) has been successfully synthesized via one step hydrothermal process using vanadium source as V2O5 and 2-Hydroxypropane-1,2,3-tricarboxylic acid as reducing and structure directing agent at 230°C for 24 hr. The product compound was analysed through X-ray diffraction (XRD) and scanning electron microscopy (SEM), and its physicochemical properties are characterized by FTIR and UV-VIS spectroscopy. The obtained VO2 (B) nanoparticles are under 10nm with optical band gap of 2.67eV. Thin film of VO2 (B) nanoparticles was deposited on ITO substrate was electrochemically characterized by cyclic voltammetry. The electrochemical characterizations have revealed reversible redox behavior which corresponds to the reversible lithium intercalation/deintercalation.VO2(B) has been successfully synthesized via one step hydrothermal process using vanadium source as V2O5 and 2-Hydroxypropane-1,2,3-tricarboxylic acid as reducing and structure directing agent at 230°C for 24 hr. The product compound was analysed through X-ray diffraction (XRD) and scanning electron microscopy (SEM), and its physicochemical properties are characterized by FTIR and UV-VIS spectroscopy. The obtained VO2 (B) nanoparticles are under 10nm with optical band gap of 2.67eV. Thin film of VO2 (B) nanoparticles was deposited on ITO substrate was electrochemically characterized by cyclic voltammetry. The electrochemical characterizations have revealed reversible redox behavior which corresponds to the reversible lithium intercalation/deintercalation.","PeriodicalId":7262,"journal":{"name":"ADVANCES IN BASIC SCIENCE (ICABS 2019)","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85175192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sanjeev K. Gupta, Shilpa Singh, Y. Sonvane, K. Nekrasov, A. Kupryazhkin, P. Gajjar
In this work, we have studied nanoclusters of thorium (Thn) (n=2-6), using first principles calculation by density functional theory. Out of these nanoclusters, the most stable isomer of Th is found to have square bipyramidal structure (Th6(b)). We have also calculated HOMO-LUMO gap (HLG) and chemical hardness of these nanoclusters, which indicates that these atomic clusters are soften. HLG of most stable nanoclusters of Th first increases from 0.29 eV (n=2) to 0.72 eV (n=4) and then decreases to 0.27 eV (n=6). Further, absorption spectra of these nanoclusters show absorption mainly in infrared (IR) and visible region (UV).In this work, we have studied nanoclusters of thorium (Thn) (n=2-6), using first principles calculation by density functional theory. Out of these nanoclusters, the most stable isomer of Th is found to have square bipyramidal structure (Th6(b)). We have also calculated HOMO-LUMO gap (HLG) and chemical hardness of these nanoclusters, which indicates that these atomic clusters are soften. HLG of most stable nanoclusters of Th first increases from 0.29 eV (n=2) to 0.72 eV (n=4) and then decreases to 0.27 eV (n=6). Further, absorption spectra of these nanoclusters show absorption mainly in infrared (IR) and visible region (UV).
在这项工作中，我们利用密度泛函理论的第一性原理计算研究了钍(Thn)纳米团簇(n=2-6)。在这些纳米簇中，最稳定的Th异构体被发现具有方形双锥体结构(Th6(b))。我们还计算了这些纳米团簇的HOMO-LUMO间隙(HLG)和化学硬度，表明这些原子团簇是软化的。最稳定的Th纳米团簇的HLG先从0.29 eV (n=2)上升到0.72 eV (n=4)，然后下降到0.27 eV (n=6)。此外，这些纳米团簇的吸收光谱主要显示在红外(IR)和可见光(UV)区吸收。在这项工作中，我们利用密度泛函理论的第一性原理计算研究了钍(Thn)纳米团簇(n=2-6)。在这些纳米簇中，最稳定的Th异构体被发现具有方形双锥体结构(Th6(b))。我们还计算了这些纳米团簇的HOMO-LUMO间隙(HLG)和化学硬度，表明这些原子团簇是软化的。最稳定的Th纳米团簇的HLG先从0.29 eV (n=2)上升到0.72 eV (n=4)，然后下降到0.27 eV (n=6)。此外，这些纳米团簇的吸收光谱主要显示在红外(IR)和可见光(UV)区吸收。
{"title":"Energetic and structural investigation of thorium nanoclusters using first principles calculations","authors":"Sanjeev K. Gupta, Shilpa Singh, Y. Sonvane, K. Nekrasov, A. Kupryazhkin, P. Gajjar","doi":"10.1063/1.5122327","DOIUrl":"https://doi.org/10.1063/1.5122327","url":null,"abstract":"In this work, we have studied nanoclusters of thorium (Thn) (n=2-6), using first principles calculation by density functional theory. Out of these nanoclusters, the most stable isomer of Th is found to have square bipyramidal structure (Th6(b)). We have also calculated HOMO-LUMO gap (HLG) and chemical hardness of these nanoclusters, which indicates that these atomic clusters are soften. HLG of most stable nanoclusters of Th first increases from 0.29 eV (n=2) to 0.72 eV (n=4) and then decreases to 0.27 eV (n=6). Further, absorption spectra of these nanoclusters show absorption mainly in infrared (IR) and visible region (UV).In this work, we have studied nanoclusters of thorium (Thn) (n=2-6), using first principles calculation by density functional theory. Out of these nanoclusters, the most stable isomer of Th is found to have square bipyramidal structure (Th6(b)). We have also calculated HOMO-LUMO gap (HLG) and chemical hardness of these nanoclusters, which indicates that these atomic clusters are soften. HLG of most stable nanoclusters of Th first increases from 0.29 eV (n=2) to 0.72 eV (n=4) and then decreases to 0.27 eV (n=6). Further, absorption spectra of these nanoclusters show absorption mainly in infrared (IR) and visible region (UV).","PeriodicalId":7262,"journal":{"name":"ADVANCES IN BASIC SCIENCE (ICABS 2019)","volume":"49 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85975878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Here we report the synthesis of Al0.492Cr1.133 Fe0.78 Mg0.499 Ni0.007 O4 Si0.001 Ti0.082 Zn0.005 (chromite) using a wet chemical approach i.e Coprecipitation method. The prepared powdered composite was structurally characterized through X-ray diffraction analysis. The XRD data was refined by MAUD and Fullprof suit software. Rietveld analysis based on structure and microstructure refinement has been used for precise determination of many microstructural parameters such as Wyckoff positions, intensity, Miller indices value, and interatomic distance. X-ray diffraction and Rietveld analysis shows that prepared sample of composites has a single cubic phase of chromite with space group Fd-3m. R-Factor (Profile R factor (Rp), Weighted R Factor (Rwp), Expected values (Rexp), Bragg R Factor (RB), Rf-Factor), goodness fit factor(χ2), have been calculated. The lower values of profile parameters such as Rp, Rwp, RB,Rexp,Rf, χ2 indicated that the calculated diffraction pattern is in fair agreement with observed pattern. Some of the applications of Chromite have also been highlighted.Here we report the synthesis of Al0.492Cr1.133 Fe0.78 Mg0.499 Ni0.007 O4 Si0.001 Ti0.082 Zn0.005 (chromite) using a wet chemical approach i.e Coprecipitation method. The prepared powdered composite was structurally characterized through X-ray diffraction analysis. The XRD data was refined by MAUD and Fullprof suit software. Rietveld analysis based on structure and microstructure refinement has been used for precise determination of many microstructural parameters such as Wyckoff positions, intensity, Miller indices value, and interatomic distance. X-ray diffraction and Rietveld analysis shows that prepared sample of composites has a single cubic phase of chromite with space group Fd-3m. R-Factor (Profile R factor (Rp), Weighted R Factor (Rwp), Expected values (Rexp), Bragg R Factor (RB), Rf-Factor), goodness fit factor(χ2), have been calculated. The lower values of profile parameters such as Rp, Rwp, RB,Rexp,Rf, χ2 indicated that the calculated diffraction pattern is in fair agreement with observed patter...
{"title":"Rietveld refinement of Al0.492Cr1.133 Fe0.78 Mg0.499 Ni0.007 O4 Si0.001 Ti0.082 Zn0.005 composite synthesized by coprecipitation method","authors":"Ankita, Sunil Rohilla","doi":"10.1063/1.5122515","DOIUrl":"https://doi.org/10.1063/1.5122515","url":null,"abstract":"Here we report the synthesis of Al0.492Cr1.133 Fe0.78 Mg0.499 Ni0.007 O4 Si0.001 Ti0.082 Zn0.005 (chromite) using a wet chemical approach i.e Coprecipitation method. The prepared powdered composite was structurally characterized through X-ray diffraction analysis. The XRD data was refined by MAUD and Fullprof suit software. Rietveld analysis based on structure and microstructure refinement has been used for precise determination of many microstructural parameters such as Wyckoff positions, intensity, Miller indices value, and interatomic distance. X-ray diffraction and Rietveld analysis shows that prepared sample of composites has a single cubic phase of chromite with space group Fd-3m. R-Factor (Profile R factor (Rp), Weighted R Factor (Rwp), Expected values (Rexp), Bragg R Factor (RB), Rf-Factor), goodness fit factor(χ2), have been calculated. The lower values of profile parameters such as Rp, Rwp, RB,Rexp,Rf, χ2 indicated that the calculated diffraction pattern is in fair agreement with observed pattern. Some of the applications of Chromite have also been highlighted.Here we report the synthesis of Al0.492Cr1.133 Fe0.78 Mg0.499 Ni0.007 O4 Si0.001 Ti0.082 Zn0.005 (chromite) using a wet chemical approach i.e Coprecipitation method. The prepared powdered composite was structurally characterized through X-ray diffraction analysis. The XRD data was refined by MAUD and Fullprof suit software. Rietveld analysis based on structure and microstructure refinement has been used for precise determination of many microstructural parameters such as Wyckoff positions, intensity, Miller indices value, and interatomic distance. X-ray diffraction and Rietveld analysis shows that prepared sample of composites has a single cubic phase of chromite with space group Fd-3m. R-Factor (Profile R factor (Rp), Weighted R Factor (Rwp), Expected values (Rexp), Bragg R Factor (RB), Rf-Factor), goodness fit factor(χ2), have been calculated. The lower values of profile parameters such as Rp, Rwp, RB,Rexp,Rf, χ2 indicated that the calculated diffraction pattern is in fair agreement with observed patter...","PeriodicalId":7262,"journal":{"name":"ADVANCES IN BASIC SCIENCE (ICABS 2019)","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86376935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Magnetite (Fe3O4) nano particles have been synthesized via sol-gel auto-combustion method using citric acid as a fuel. Post preparation thermal treatment was done at: 220 °C, 270 °C and, 320 °C for 1 hour, to insure the formation of single phase Fe3O4 nano particles. X-Ray diffraction (XRD) results confirm the formation of Magnetite (Fe3O4), and also the presence of Hematite (α-Fe2O3) as secondary phase. Results reveal that with increasing annealing temperature lattice parameter (a), specific surface area (S), hopping lengths (LA, LB) for tetrahedral (A) and octahedral site (B) increases, whereas x-ray density (ρXRD) and, Scherer’s grain diameter (Ds) varies respectively range between 5286.2−5376.1 kg/m3, 37.2−43.5 nm. Study of Fe3O4 nano particles is of value, due to its prospective applications in medical science - treating metastatic cancer by injecting into the cells.
{"title":"Sol-gel auto-combustion synthesis of magnetite and its characterization via x-ray diffraction","authors":"C. Parmar, R. Verma, A. Ghosh, S. Modak, S. Kane","doi":"10.1063/1.5122595","DOIUrl":"https://doi.org/10.1063/1.5122595","url":null,"abstract":"Magnetite (Fe3O4) nano particles have been synthesized via sol-gel auto-combustion method using citric acid as a fuel. Post preparation thermal treatment was done at: 220 °C, 270 °C and, 320 °C for 1 hour, to insure the formation of single phase Fe3O4 nano particles. X-Ray diffraction (XRD) results confirm the formation of Magnetite (Fe3O4), and also the presence of Hematite (α-Fe2O3) as secondary phase. Results reveal that with increasing annealing temperature lattice parameter (a), specific surface area (S), hopping lengths (LA, LB) for tetrahedral (A) and octahedral site (B) increases, whereas x-ray density (ρXRD) and, Scherer’s grain diameter (Ds) varies respectively range between 5286.2−5376.1 kg/m3, 37.2−43.5 nm. Study of Fe3O4 nano particles is of value, due to its prospective applications in medical science - treating metastatic cancer by injecting into the cells.","PeriodicalId":7262,"journal":{"name":"ADVANCES IN BASIC SCIENCE (ICABS 2019)","volume":"109 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91334857","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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