T. Sai Santoshi , S. Bharadwaj , M. Chaitanya Varma , Vivek Dhand , G.S.V.R.K. Choudary
{"title":"用共沉淀法制备并在不同温度下退火的含锂铁氧体的 α-Fe2O3 的结构和磁特性","authors":"T. Sai Santoshi , S. Bharadwaj , M. Chaitanya Varma , Vivek Dhand , G.S.V.R.K. Choudary","doi":"10.1016/j.chphi.2024.100717","DOIUrl":null,"url":null,"abstract":"<div><p>Using Co-precipitation method, an attempt was made to prepare lithium ferrite. However, during the synthesis, formation of an additional α-Fe<sub>2</sub>O<sub>3</sub> phase along with Li<sub>0.5</sub>Fe<sub>2.5</sub>O<sub>4</sub> was observed. To reduce the α-Fe<sub>2</sub>O<sub>3</sub> phase, samples were annealed at 700°C, 800°C and 900°C temperatures for 2 hours. The investigated samples were then characterized using X-Ray diffraction for phase formation and Rietveld analysis was carried out to determine the different structural parameters such as phase percentage, lattice parameter and cell volume. The Chi square values were observed to be within the limit along with goodness of fit less than 3 for all the samples annealed at different temperatures. Surface morphology was carried out using scanning electron microscope and the average grain size was found to be 1.43 µm for the sample annealed at 900°C. Magnetic properties of samples were investigated, and it was observed that all the samples exhibit low values of saturation magnetization along with coercivity. The presence of two phases such as α-Fe<sub>2</sub>O<sub>3</sub> phase and lithium ferrite phase dilutes the exchange interaction, tuning the magnetic parameters.</p></div>","PeriodicalId":9758,"journal":{"name":"Chemical Physics Impact","volume":"9 ","pages":"Article 100717"},"PeriodicalIF":3.8000,"publicationDate":"2024-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2667022424002615/pdfft?md5=fece485576a9b152f5cd710b88b54cf5&pid=1-s2.0-S2667022424002615-main.pdf","citationCount":"0","resultStr":"{\"title\":\"Structural and magnetic properties of α-Fe2O3 with lithium ferrite prepared using co-precipitation method and annealed at different temperatures\",\"authors\":\"T. Sai Santoshi , S. Bharadwaj , M. Chaitanya Varma , Vivek Dhand , G.S.V.R.K. Choudary\",\"doi\":\"10.1016/j.chphi.2024.100717\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Using Co-precipitation method, an attempt was made to prepare lithium ferrite. However, during the synthesis, formation of an additional α-Fe<sub>2</sub>O<sub>3</sub> phase along with Li<sub>0.5</sub>Fe<sub>2.5</sub>O<sub>4</sub> was observed. To reduce the α-Fe<sub>2</sub>O<sub>3</sub> phase, samples were annealed at 700°C, 800°C and 900°C temperatures for 2 hours. The investigated samples were then characterized using X-Ray diffraction for phase formation and Rietveld analysis was carried out to determine the different structural parameters such as phase percentage, lattice parameter and cell volume. The Chi square values were observed to be within the limit along with goodness of fit less than 3 for all the samples annealed at different temperatures. Surface morphology was carried out using scanning electron microscope and the average grain size was found to be 1.43 µm for the sample annealed at 900°C. Magnetic properties of samples were investigated, and it was observed that all the samples exhibit low values of saturation magnetization along with coercivity. The presence of two phases such as α-Fe<sub>2</sub>O<sub>3</sub> phase and lithium ferrite phase dilutes the exchange interaction, tuning the magnetic parameters.</p></div>\",\"PeriodicalId\":9758,\"journal\":{\"name\":\"Chemical Physics Impact\",\"volume\":\"9 \",\"pages\":\"Article 100717\"},\"PeriodicalIF\":3.8000,\"publicationDate\":\"2024-08-24\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.sciencedirect.com/science/article/pii/S2667022424002615/pdfft?md5=fece485576a9b152f5cd710b88b54cf5&pid=1-s2.0-S2667022424002615-main.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Chemical Physics Impact\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2667022424002615\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Chemical Physics Impact","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2667022424002615","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Structural and magnetic properties of α-Fe2O3 with lithium ferrite prepared using co-precipitation method and annealed at different temperatures
Using Co-precipitation method, an attempt was made to prepare lithium ferrite. However, during the synthesis, formation of an additional α-Fe2O3 phase along with Li0.5Fe2.5O4 was observed. To reduce the α-Fe2O3 phase, samples were annealed at 700°C, 800°C and 900°C temperatures for 2 hours. The investigated samples were then characterized using X-Ray diffraction for phase formation and Rietveld analysis was carried out to determine the different structural parameters such as phase percentage, lattice parameter and cell volume. The Chi square values were observed to be within the limit along with goodness of fit less than 3 for all the samples annealed at different temperatures. Surface morphology was carried out using scanning electron microscope and the average grain size was found to be 1.43 µm for the sample annealed at 900°C. Magnetic properties of samples were investigated, and it was observed that all the samples exhibit low values of saturation magnetization along with coercivity. The presence of two phases such as α-Fe2O3 phase and lithium ferrite phase dilutes the exchange interaction, tuning the magnetic parameters.