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Volume 7 Issue 2 July - September 2019

Research Paper

Synthesis of Gd-Doped Ceria Films from (Ce, Gd)-EDTA Solutions via Atmospheric Sintering

Keiji Komatsu* , Tsuyoshi Kikuta, Atsushi Nakamura*, Hidetoshi Saitoh****

-, Department of Materials Science and Technology, Nagaoka University of Technology, Nagaoka, Japan.

Chubu Chelest Co Ltd, Osaka, Japan.

Komatsu, K., Kikuta, T., Nakamura, A., and Saitoh, H. (2019). Synthesis of Gd-Doped Ceria Films from (Ce, Gd)-EDTA Solutions via Atmospheric Sintering. i-manager’s Journal on Material Science, 7(2), 1-9. https://doi.org/10.26634/jms.7.2.16027

Abstract

Gd-doped ceria (GDC) films were synthesized on Si substrates from (Ce, Gd)-EDTA solutions and atmospheric sintering. The (Ce, Gd)-EDTA solutions were coated onto silicon by a commercial spin coater and the coated samples were sintered in a furnace at 850^oC for 1 h. For the composition of Ce: Gd=0.8:0.2 in the EDTA complex with sintering at 850^oC only the crystalline phases of Ce_0.8Gd_0.2O_1.9 were synthesised on the Si substrates. Microstructures of the Ce_0.8Gd_0.2O_1.9 films had 78 3D-relative densities as revealed by ellipsometry. Furthermore, the oxidation degree of the Ce ion was equal in the obtained Ce_0.8Gd_0.2Ofilms at various experimental conditions as confirmed by XPS analysis.

References

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[5]. Gong, Y., Ji, W., Zhang, L., Li, M., Xie, B., Wang, H., ... & Song, Y. (2011). Low temperature deposited (Ce, Gd) O_2−x interlayer for La Sr Co_0.6Fe_0.4O_0.2Fe_0.8O₃ cathode based solid oxide fuel cell. Journal of Power Sources, 196(5), 2768- 2772. https://doi.org/10.1016/j.ssi.2007.12.008

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Research Paper

Synthesis and characterization of La substituted M type Calcium Hexaferrite

V. S. Shinde* , S. G. Dahotre, L. N. Singh*

* Department of Physics, Konkan Education Society's Anandibai Pradhan Science College, Nagothane, Maharashtra, India.

-* Department of Physics, Dr. Babasaheb Ambedkar Technological University, Lonere, Maharashtra, India.

Shinde, V. S., Dahotre, S. G., and Singh, L. N. (2019). Synthesis and Characterization of La Substituted M type Calcium Hexaferrite. i-manager’s Journal on Material Science, 7(1), 10-17. https://doi.org/10.26634/jms.7.2.15960

Abstract

La substituted M type Calcium hexaferrite with composition CaLa_xFe_12-xO₁₉ (x=0.5, 1.0, 1.5, 2.0) were synthesized by sol gel auto combustion method. The prepared samples were characterized by XRD, SEM, EDAX, FTIR, and VSM. X ray diffraction study shows that all the species have hexagonal crystal structure with lattice constants of a =5.87 - 5.91 Å and c = 22.89 - 23.21 Å. There was increase in lattice volume with increasing La ion concentration. SEM images reveal that particles were hexagonal platelet-like shape, and the grain size increases with increase of La ion concentration. EDS measurements revealed the stoichiometric cationic ratios of the prepared samples. The absorption band between 520 cm^-1 and 440 cm^-1 in FTIR confirm the formation of hexaferrite. The magnetic properties of the samples were studied by VSM. The change in magnetic parameter results make substituted hexaferrite material suitable for recording media..

References

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[2]. Azim, M., Atiq, S., Riaz, S., & Naseem, S. (2014). Indexing the structural parameters and investigating the magnetic properties of lanthanum doped strontium hexaferrites. In IOP Conference Series: Materials Science and Engineering (Vol. 60, No. 1, p. 012045). IOP Publishing. https://doi.org/10.1088/1757-899X/60/1/ 012045

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[4]. Dafe, S., & Salunkhe, M. ( 2015). FTIR study of diamagnetic Mg²⁺ substitute Ni Z hexaferrite. 2 International Journal of Engineering Research & Technology, 4(11), 345-347. http://dx.doi.org/10.17577/ IJERTV4IS110287

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Research Paper

First Principle Electronic, Magnetic, and Thermodynamic Characterization of Gd₂Cu₂X (X= Cd, In, Mg)Isostructural Ternary Alloys

Naveen Kumar* , Sachin Kumar, Kamna Yadav, Jyoti Sagar , Dr. Ali JbaeerDawood

- Department of Physics, M. M. H. College, Ghaziabad, Uttar Pradesh, India.

Department of Chemistry, S. S. V. College, Hapur, Uttar Pradesh, India.

*** Department of Physics, S. S. V. College, Hapur, Uttar Pradesh, India.

Kumar, N., Kumar, S., Yadav, K., Sagar, J., and Singh, R. P. (2019). First Principle Electronic, Magnetic and Thermodynamic Characterization of Gd₂Cu₂X (X= Cd, In, Mg) Isostructural Ternary Alloys. i-manager’s Journal on Material Science, 7(1), 18-34. https://doi.org/10.26634/jms.7.2.15646

Abstract

Ternary Rare earth transition metal alloys with 2:2:1 stoichiometry, viz. RE₂Cu₂X (RE= Rare earth, X= Cd, In, Mg) are used in the magnetic refrigeration technology due to their unique magnetic and physical properties. For more future aspect of technological applications, Gd₂Cu₂X (X= Cd, In, Mg) alloys have been preferred from RE₂Cu₂X series to study the spin polarized electronic, magnetic, and thermodynamic properties using first principal theory. The spin polarized electronic behavior of Gd₂Cu₂X (X= Cd, In, Mg) shows that Gd-f orbital electrons play main role in the electronic conduction and magnetization. Magnetic calculations show high accuracy with available experimental/theoretical literature values on these materials. Thermodynamic calculations have been carried out in the wide temperature and pressure range for the first time.

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Soft Chemical Route Synthesized CdS/CuInGaSe₂ Thin Films for Photovoltaic Application

Rajesh A. Joshi* , Nikhielesh S. Bajaj, Mukul Gupta*, Ekram Habeeb Hassan****

- Department of Physics, Toshniwal Arts, Commerce and Science College, Sengaon, Maharashtra, India.

-**** UGC-DAE Consortium for Scientific Research, University Campus, Khandwa Road, Indore, Madhya Pradesh, India.

Joshi, R. A., Bajaj, N. S., Gupta, M., and Phase, D. M. (2019). Soft Chemical Route Synthesized CdS/CuInGaSe₂ Thin Films for Photovoltaic Application. i-manager’s Journal on Material Science, 7(1), 35-41. https://doi.org/10.26634/jms.7.2.15649

Abstract

Chalcopyrite heterojunction thin films of CdS/CuInGaSe₂ were synthesized using soft chemical ion exchange route at room temperature over the Indium Tin Oxide (ITO) glass substrate for photovoltaic applications; these as-deposited thin films were characterized for structural, morphological, optical, and electrical properties. The structural characteristics observed using X-ray diffraction pattern (XRD) represent (112), (212), (105), and (205) planes corresponding to chalcopyrite phase of tetragonal CuInGaSe₂ material. Peak at 21.40^oin XRD confirms CdS composition, while average crystallite size is calculated to be 27nm. The XRD observations supported by Raman spectrum represent two shifts at ~113 cm^-1, and 298 cm^-1, respectively corresponding to A₁and B₂ modes of chalcopyrite CuInGaSe₂ materials. Morphological studies using Scanning Electron Microscopy (SEM) exhibits plate like petal distribution with smaller size particles attached over the substrate surface. The energy band gap calculated using extrapolating the absorbance spectra is found to be ~1.47eV. This may correspond to defect state and stiochiometry induced charge transfer. The Hall Effect measurement revealed carrier charge concentration of 3x10²³cm^-3, charge mobility of 7.2 cm²/Vs. I-V studies show ~1.12% conversion efficiency under light illumination condition of 100 mW/cm².

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Carbon Dioxide Gas Sensing Property of Nickel Substituted Zinc Ferrite

S. N. Patil * , B. P. Ladgaonkar, A. M. Pawar*

, Department of Electronics, Tuljaram Chaturchand College, Pune, Maharashtra, India.

Department of Electronics, Shankarrao Mohite College, Solapur, Maharashtra, India.

Patil, S. N., Ladgaonkar, B. P., and Pawar, A. M. (2019). Carbon Dioxide Gas Sensing Property of Nickel Substituted Zinc Ferrite. i-manager’s Journal on Material Science, 7(1), 42-48. https://doi.org/10.26634/jms.7.2.15161

Abstract

The polycrystalline NiZn ferrite have been synthesized by co-precipitation method and characterized by X-ray powder diffraction and FTIR spectroscopy. The FTIR spectra is obtained in the range from 400 cm^-1to 4000 cm^-1.Absorption bands observed at higher frequencies suggest the existence of significant modes of vibrations. The existence of absorption bands at frequency about 1627 cm^-1, 2923 cm^-1, and 3437 cm^-1are attributed to vibrational modes of triatomic water molecule. The absorption bands, observed at 414 cm^-1and 590 cm^-1, confirm the formation of the spinel structure.Employing these materials, the sensing elements, were developed on cylindrical glass as substrate. Carbon dioxide (CO₂) gas sensitive electrical properties of the compositions were investigated. The results are attributed to the chemisorption of oxygen species at specific operating temperature. Existence of nano crystallites favors surface phenomenon of adsorption. The materials show n-type conductivity at ambience and depict increase in the resistance due to presence of oxidizing gas. The electrical resistance of sensing elements (RCO₂) was measured for variable concentration of CO₂ gas from 0% to 15%. The RCO₂ increases with increase in CO₂. The sensitivities of the compositions under investigation are also estimated and the result of investigation is discussed here.

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Surface Enhancement and Improved Mechanical Properties of SA-210 Gr. A1 Boiler Steel by Friction Stir Processing

Supreet Singh* , Manpreet Kaur, Manoj Kumar*, Harprabhjot Singh**, Navneetinder Singh*, Sukanta Sarkar****

, Department of Mechanical Engineering, Chandigarh University, Mohali, Punjab, India.

Department of Mechanical Engineering, Baba Banda Singh Bahadur Engineering College, Fatehgarh Sahib, Punjab, India.

** Department of Mechanical Engineering, Indian Institute of Technology, New Delhi, India.

* Department of Automobile Engineering, Chandigarh University, Mohali, Punjab, India.

**** Department of Metallurgical Engineering and Material Science, Indian Institute of Technology Bombay, Maharashtra, India.

Singh, S., Kaur, M., Kumar, M., Singh, H., Singh, N., and Sarkar, S. (2019). Surface Enhancement and Improved Mechanical Properties of SA-210 Gr. A1 Boiler Steel by Friction Stir Processing i-manager’s Journal on Material Science, 7(1), 49-60. https://doi.org/10.26634/jms.7.2.15941

Abstract

Elevated temperature corrosion is an important material squalor mechanism knowledgeable in boilers in power plants energy generation sectors. Metallic materials such as low carbon steels have special properties, such as easy fabrication and machinability, low cost, but a solemn disadvantage of these materials is that the deterioration in properties originating from the interface with the environment and has poor corrosion resistance. The main objective of the current investigation is to achieve strengthening of SA210 Grade A1 boiler steel through microstructural refinement by Friction Stir Processing (FSP) and analyze the effect of the same on high temperature corrosion behavior. The microstructural, hardness, tensile and corrosion resistance of the unprocessed and FSPed materials was assessed. The characterization was done by XRD and SEM/EDS analyses with an intend to suggest mechanisms behind high temperature corrosion behavior of the FSPed samples.

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[27]. Xue, P., Li, W. D., Wang, D., Wang, W. G., Xiao, B. L., & Ma, Z. Y. (2016). Enhanced mechanical properties of medium carbon steel casting via friction stir processing and subsequent annealing. Materials Science and Engineering: A, 670, 153-158. https://doi.org/10.1016/j. msea.2016.06.014

[28]. Xue, P., Ma, Z. Y., Komizo, Y., & Fujii, H. (2016). Achieving ultrafine-grained ferrite structure in friction stir processed weld metal. Materials Letters, 162, 161-164. https://doi.org/10.1016/j.matlet.2015.09.115

[29]. Xue, P., Xiao, B. L., & Ma, Z. Y. (2013). Achieving largearea bulk ultrafine grained Cu via submerged multiplepass friction stir processing. Journal of Materials Science & Technology, 29(12), 1111-1115. https://doi.org/10. 1016/j.jmst.2013.09.021

[30]. Xue, P., Xiao, B. L., Wang, W. G., Zhang, Q., Wang, D., Wang, Q. Z., & Ma, Z. Y. (2013). Achieving ultrafine dual-phase structure with superior mechanical property in friction stir processed plain low carbon steel. Materials Science and Engineering: A, 575, 30-34. https://doi.org/ 10.1016/j.msea.2013.03.033

i-manager's Journal on Material Science (JMS)

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Volume 7 Issue 2 July - September 2019

Synthesis of Gd-Doped Ceria Films from (Ce, Gd)-EDTA Solutions via Atmospheric Sintering

Keiji Komatsu* , Tsuyoshi Kikuta**, Atsushi Nakamura***, Hidetoshi Saitoh****

*-**,**** Department of Materials Science and Technology, Nagaoka University of Technology, Nagaoka, Japan. *** Chubu Chelest Co Ltd, Osaka, Japan.

Komatsu, K., Kikuta, T., Nakamura, A., and Saitoh, H. (2019). Synthesis of Gd-Doped Ceria Films from (Ce, Gd)-EDTA Solutions via Atmospheric Sintering. i-manager’s Journal on Material Science, 7(2), 1-9. https://doi.org/10.26634/jms.7.2.16027

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Synthesis and characterization of La substituted M type Calcium Hexaferrite

V. S. Shinde* , S. G. Dahotre**, L. N. Singh***

* Department of Physics, Konkan Education Society's Anandibai Pradhan Science College, Nagothane, Maharashtra, India. **-*** Department of Physics, Dr. Babasaheb Ambedkar Technological University, Lonere, Maharashtra, India.

Shinde, V. S., Dahotre, S. G., and Singh, L. N. (2019). Synthesis and Characterization of La Substituted M type Calcium Hexaferrite. i-manager’s Journal on Material Science, 7(1), 10-17. https://doi.org/10.26634/jms.7.2.15960

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First Principle Electronic, Magnetic, and Thermodynamic Characterization of Gd2Cu2X (X= Cd, In, Mg)Isostructural Ternary Alloys

Naveen Kumar* , Sachin Kumar**, Kamna Yadav***, Jyoti Sagar ****, Dr. Ali JbaeerDawood*****

*-*** Department of Physics, M. M. H. College, Ghaziabad, Uttar Pradesh, India. **** Department of Chemistry, S. S. V. College, Hapur, Uttar Pradesh, India. ***** Department of Physics, S. S. V. College, Hapur, Uttar Pradesh, India.

Kumar, N., Kumar, S., Yadav, K., Sagar, J., and Singh, R. P. (2019). First Principle Electronic, Magnetic and Thermodynamic Characterization of Gd2Cu2X (X= Cd, In, Mg) Isostructural Ternary Alloys. i-manager’s Journal on Material Science, 7(1), 18-34. https://doi.org/10.26634/jms.7.2.15646

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Soft Chemical Route Synthesized CdS/CuInGaSe2 Thin Films for Photovoltaic Application

Rajesh A. Joshi* , Nikhielesh S. Bajaj**, Mukul Gupta***, Ekram Habeeb Hassan****

*-** Department of Physics, Toshniwal Arts, Commerce and Science College, Sengaon, Maharashtra, India. ***-**** UGC-DAE Consortium for Scientific Research, University Campus, Khandwa Road, Indore, Madhya Pradesh, India.

Joshi, R. A., Bajaj, N. S., Gupta, M., and Phase, D. M. (2019). Soft Chemical Route Synthesized CdS/CuInGaSe2 Thin Films for Photovoltaic Application. i-manager’s Journal on Material Science, 7(1), 35-41. https://doi.org/10.26634/jms.7.2.15649

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Carbon Dioxide Gas Sensing Property of Nickel Substituted Zinc Ferrite

S. N. Patil * , B. P. Ladgaonkar**, A. M. Pawar***

*,*** Department of Electronics, Tuljaram Chaturchand College, Pune, Maharashtra, India. ** Department of Electronics, Shankarrao Mohite College, Solapur, Maharashtra, India.

Patil, S. N., Ladgaonkar, B. P., and Pawar, A. M. (2019). Carbon Dioxide Gas Sensing Property of Nickel Substituted Zinc Ferrite. i-manager’s Journal on Material Science, 7(1), 42-48. https://doi.org/10.26634/jms.7.2.15161

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Surface Enhancement and Improved Mechanical Properties of SA-210 Gr. A1 Boiler Steel by Friction Stir Processing

Supreet Singh* , Manpreet Kaur**, Manoj Kumar***, Harprabhjot Singh****, Navneetinder Singh*****, Sukanta Sarkar******

Singh, S., Kaur, M., Kumar, M., Singh, H., Singh, N., and Sarkar, S. (2019). Surface Enhancement and Improved Mechanical Properties of SA-210 Gr. A1 Boiler Steel by Friction Stir Processing i-manager’s Journal on Material Science, 7(1), 49-60. https://doi.org/10.26634/jms.7.2.15941

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Keiji Komatsu* , Tsuyoshi Kikuta, Atsushi Nakamura*, Hidetoshi Saitoh****

-, Department of Materials Science and Technology, Nagaoka University of Technology, Nagaoka, Japan.

Chubu Chelest Co Ltd, Osaka, Japan.

V. S. Shinde* , S. G. Dahotre, L. N. Singh*

* Department of Physics, Konkan Education Society's Anandibai Pradhan Science College, Nagothane, Maharashtra, India.

-* Department of Physics, Dr. Babasaheb Ambedkar Technological University, Lonere, Maharashtra, India.

First Principle Electronic, Magnetic, and Thermodynamic Characterization of Gd₂Cu₂X (X= Cd, In, Mg)Isostructural Ternary Alloys

Naveen Kumar* , Sachin Kumar, Kamna Yadav, Jyoti Sagar , Dr. Ali JbaeerDawood

- Department of Physics, M. M. H. College, Ghaziabad, Uttar Pradesh, India.

Department of Chemistry, S. S. V. College, Hapur, Uttar Pradesh, India.

*** Department of Physics, S. S. V. College, Hapur, Uttar Pradesh, India.

Kumar, N., Kumar, S., Yadav, K., Sagar, J., and Singh, R. P. (2019). First Principle Electronic, Magnetic and Thermodynamic Characterization of Gd₂Cu₂X (X= Cd, In, Mg) Isostructural Ternary Alloys. i-manager’s Journal on Material Science, 7(1), 18-34. https://doi.org/10.26634/jms.7.2.15646

Soft Chemical Route Synthesized CdS/CuInGaSe₂ Thin Films for Photovoltaic Application

Rajesh A. Joshi* , Nikhielesh S. Bajaj, Mukul Gupta*, Ekram Habeeb Hassan****

- Department of Physics, Toshniwal Arts, Commerce and Science College, Sengaon, Maharashtra, India.

-**** UGC-DAE Consortium for Scientific Research, University Campus, Khandwa Road, Indore, Madhya Pradesh, India.

Joshi, R. A., Bajaj, N. S., Gupta, M., and Phase, D. M. (2019). Soft Chemical Route Synthesized CdS/CuInGaSe₂ Thin Films for Photovoltaic Application. i-manager’s Journal on Material Science, 7(1), 35-41. https://doi.org/10.26634/jms.7.2.15649

S. N. Patil * , B. P. Ladgaonkar, A. M. Pawar*

, Department of Electronics, Tuljaram Chaturchand College, Pune, Maharashtra, India.

Department of Electronics, Shankarrao Mohite College, Solapur, Maharashtra, India.

Supreet Singh* , Manpreet Kaur, Manoj Kumar*, Harprabhjot Singh**, Navneetinder Singh*, Sukanta Sarkar****