Effect of Yttrium (20%) doping on mechanical properties of rare earth nano lanthanum phosphate (LaPO4) synthesized by aqueous sol-gel process |
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| Affiliation: | 1. Research Scholar, Department of Mechanical Engineering, VFSTR (Deemed to Be University), Guntur, 522213, AP, India;2. Department of Mechanical Engineering, VIGNAN’S LARA Institute of Technology and Science, Guntur, 522213, AP, India;3. Department of Mechanical Engineering, VFSTR (Deemed to Be University), Guntur, 522213, AP, India;1. Department of Chemical Engineering, Konkuk University, Seoul 05029, Republic of Korea;2. Department of Physics, Vignan’s Lara Institute of Technology & Science, Vadlamudi, Guntur, Andhra Pradesh, 522 213, India;3. Department of Applied Physics, Delhi Technological University, Bawana Road, New Delhi, 110 042, India;4. Department of Physics, S.V. University, Tirupati, 517 502, Andhra Pradesh, India;1. Department of Chemical Engineering, Konkuk University, Seoul, 05029, Republic of Korea;2. Department of Physics, Vignan’s Lara Institute of Technology & Science, Vadlamudi, Guntur, Andhra Pradesh, 522213, India;3. Department of Physics, V R Siddhartha Engineering College (Autonomous), Vijayawada, Andhra Pradesh, 522007, India;4. Department of Applied Physics, Delhi Technological University, Bawana Road, New Delhi, 110042, India;5. Department of Food Science and Biotechnology, Dongguk University-Seoul, Ilsandong-gu, Goyang-si, Gyenggi-do 410820, Republic of Korea;1. Vignan''s Lara Institute of Technology and Science, Guntur-522213, India;2. VNR VJ Institute of Engineering and Technology, Hyderabad-500090, India;3. Vignan''s Foundation for Science, Technology & Research, Guntur-522213, India;4. PSG Institute of Technology and Applied Research, Coimbatore-641062, India;1. Department of Chemical Engineering, Konkuk University, Seoul 05029, Republic of Korea;2. Department of Physics, R.T.M. Nagpur University, Nagpur 440033, India;1. Chemical Engineering and Process Development Division, National Chemical Laboratory, Pune 411008, India;2. Academy of Scientific and Innovative Research (AcSIR), Anusandhan Bhawan, Rafi Marg, New Delhi 110001, India |
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| Abstract: | In this study, Nascent Lanthanum Phosphate (LaPO4) and LaPO4 with 20% reinforced Yttria (Y2O3) precursor ceramic powder was synthesized through aqueous Sol-gel route, where theLaPO4 and LaPO4/Y2O3 powder was sourced from Lanthanum chloride (LaCl3) and orthophosphoric acid (H3PO4). By sintering the precursor powder at 1400 °C for 2 h, a relatively high-density composite material of LaPO4 (97.4%) and LaPO4/Y2O3 (98.4%) were fabricated. Through X-ray powder diffraction (XRD) experiment, the results revealed that LaPO4 and LaPO4/Y2O3 electrolyte samples sintered at 1400 °C for 2 h is impurity free and thereby elemental composition of the powders is also verified. Further, a small quantity of LaP2 and La2O3elements formed during the synthesis of LaPO4 was found to contribute more on corrosion resistance and high withstanding capacity of the material. 26% of YPO4 formed due to a chemical reaction between Yttrium and Lanthanum made this composite a suitable candidate material for high-temperature applications. Various mechanical characterization tests such as micro-hardness, flexural strength, and compression capacity were studied, where the microscopic analysis provided comprehensive information about both transgranular and intergranular types of failure on the fractured regions of LaPO4 and LaPO4/Y2O3 material. The MicroVicker'shardness of LaPO4 and composite was found to be 5 GPa and 5.2 GPa, respectively. When compared with the nascent sample, on an average, 22% reduction in flexural strength and a 1.05% increase in Young's modulus are observed for the high-density composite. |
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| Keywords: | Flexural properties Tensile property Micro-hardness Surface characterization |
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