Muhammad Syazwan Mustaffa, R. Azis, SakinahSulaiman
{"title":"pH变化对溶胶-凝胶合成铁酸锶纳米颗粒结构、形态和磁性能的影响","authors":"Muhammad Syazwan Mustaffa, R. Azis, SakinahSulaiman","doi":"10.5772/INTECHOPEN.80667","DOIUrl":null,"url":null,"abstract":"In this research work, an attempt of regulating the pH as a sol-gel modification parameter during preparation of SrFe 12 O 19 nanoparticles sintered at a low sintering temperature of 900 (cid:1) C has been presented. The relationship of varying pH (pH 1 – 14) on structural microstructures and magnetic behaviors of SrFe 12 O 19 nanoparticles was characterized by X-ray diffraction (XRD), field emission scanning microscope (FESEM), thermogravimetric analysis (TGA), Fourier-transform infrared (FTIR), and vibrating-sample magnetometer (VSM). The single-phase SrFe 2 O 19 with optimum magnetic properties can be obtained at pH 1 with a sintering temperature of 900 (cid:1) C. As pH values increase, the presence of impurity Fe 2 O 3 was observed. TGA data-varying pH shows that the total weight loss of most samples was at 30.44% which corresponds to the decomposition process. The IR spectra showed three main absorption bands in the range of 400 – 600 cm (cid:3) 1 corresponding to strontium hexaferrite. SEM micrographs exhibit a circular crystal type of strontium ferrite with an average crystal size in the range of 53 – 133 nm. A higher saturation magnetization M s , remanent magnetization M r , and hysteresis H c were recorded to have a large loop of 55.094 emu/g, 33.995 emu/g, and 5357.6 Oe, respectively, at pH 11, which make the synthesized materials useful for high-density recording media and permanent magnets.","PeriodicalId":21910,"journal":{"name":"Sol-Gel Method - Design and Synthesis of New Materials with Interesting Physical, Chemical and Biological Properties","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2019-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":"{\"title\":\"Dependence of pH Variation on the Structural, Morphological, and Magnetic Properties of Sol-Gel Synthesized Strontium Ferrite Nanoparticles\",\"authors\":\"Muhammad Syazwan Mustaffa, R. Azis, SakinahSulaiman\",\"doi\":\"10.5772/INTECHOPEN.80667\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"In this research work, an attempt of regulating the pH as a sol-gel modification parameter during preparation of SrFe 12 O 19 nanoparticles sintered at a low sintering temperature of 900 (cid:1) C has been presented. The relationship of varying pH (pH 1 – 14) on structural microstructures and magnetic behaviors of SrFe 12 O 19 nanoparticles was characterized by X-ray diffraction (XRD), field emission scanning microscope (FESEM), thermogravimetric analysis (TGA), Fourier-transform infrared (FTIR), and vibrating-sample magnetometer (VSM). The single-phase SrFe 2 O 19 with optimum magnetic properties can be obtained at pH 1 with a sintering temperature of 900 (cid:1) C. As pH values increase, the presence of impurity Fe 2 O 3 was observed. TGA data-varying pH shows that the total weight loss of most samples was at 30.44% which corresponds to the decomposition process. The IR spectra showed three main absorption bands in the range of 400 – 600 cm (cid:3) 1 corresponding to strontium hexaferrite. SEM micrographs exhibit a circular crystal type of strontium ferrite with an average crystal size in the range of 53 – 133 nm. A higher saturation magnetization M s , remanent magnetization M r , and hysteresis H c were recorded to have a large loop of 55.094 emu/g, 33.995 emu/g, and 5357.6 Oe, respectively, at pH 11, which make the synthesized materials useful for high-density recording media and permanent magnets.\",\"PeriodicalId\":21910,\"journal\":{\"name\":\"Sol-Gel Method - Design and Synthesis of New Materials with Interesting Physical, Chemical and Biological Properties\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2019-02-13\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"2\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Sol-Gel Method - Design and Synthesis of New Materials with Interesting Physical, Chemical and Biological Properties\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.5772/INTECHOPEN.80667\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Sol-Gel Method - Design and Synthesis of New Materials with Interesting Physical, Chemical and Biological Properties","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.5772/INTECHOPEN.80667","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Dependence of pH Variation on the Structural, Morphological, and Magnetic Properties of Sol-Gel Synthesized Strontium Ferrite Nanoparticles
In this research work, an attempt of regulating the pH as a sol-gel modification parameter during preparation of SrFe 12 O 19 nanoparticles sintered at a low sintering temperature of 900 (cid:1) C has been presented. The relationship of varying pH (pH 1 – 14) on structural microstructures and magnetic behaviors of SrFe 12 O 19 nanoparticles was characterized by X-ray diffraction (XRD), field emission scanning microscope (FESEM), thermogravimetric analysis (TGA), Fourier-transform infrared (FTIR), and vibrating-sample magnetometer (VSM). The single-phase SrFe 2 O 19 with optimum magnetic properties can be obtained at pH 1 with a sintering temperature of 900 (cid:1) C. As pH values increase, the presence of impurity Fe 2 O 3 was observed. TGA data-varying pH shows that the total weight loss of most samples was at 30.44% which corresponds to the decomposition process. The IR spectra showed three main absorption bands in the range of 400 – 600 cm (cid:3) 1 corresponding to strontium hexaferrite. SEM micrographs exhibit a circular crystal type of strontium ferrite with an average crystal size in the range of 53 – 133 nm. A higher saturation magnetization M s , remanent magnetization M r , and hysteresis H c were recorded to have a large loop of 55.094 emu/g, 33.995 emu/g, and 5357.6 Oe, respectively, at pH 11, which make the synthesized materials useful for high-density recording media and permanent magnets.