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Item Metadata only Magnetization of a spinel ferrite(Mahidol University. Mahidol University Library and Knowledge Center, 1987) Vichit Pinitchun; Tang, I-MingA molecular field theory for mixed spinel ferrites is developed which takes into account the disorder caused by the random arrangement of the two types of magnetic ions both of the sublattices of the spinel structure. The case of the mixed state... points of the mixed spinel ferrites are the same for both cases. The expressions for the local field fluctuations are, however, different for the two cases. The temperature behaviors of the configuration averages of the four different spins in CoFe(,2)OPublication Metadata only Oxidative thermal conversion of hydrothermal derived precursors toward the mixed-metal cobaltite spinel oxides (Znco2o4 and nico2o4): In-situ investigation by synchrotron-radiation xrd and xas techniques(2021-10-01) Wanchai Deeloed; Yuranan Hanlumyuang; Wanwisa Limphirat; Songwut Suramitr; Kantapat Chansaenpak; Pongsakorn Kanjanaboos; Suttipong Wannapaiboon; Worawat Wattanathana; Kasetsart University; Mahidol University; Thailand National Science and Technology Development Agency; Synchrotron Light Research InstituteIn-situ investigations of structural transitions during the thermal-oxidative event of mixedmetal spinel oxide precursors, the so-called nickel-(NCO) and zinc-containing (ZCO) cobaltite spinel precursors, were investigated to understand... the formations of the derived NiCo2O4 and ZnCo2O4 spinel oxides, respectively. In-situ XRD investigation revealed that emerged temperatures for spinel oxide phase were between 325 and 400◦C, depending on the cationic substituent. It indicated that the emergedPublication Metadata only NiAl 2 O 4 spinel-type catalysts for deoxygenation of palm oil to green diesel(2018-08-01) Atthapon Srifa; Rungnapa Kaewmeesri; Cheng Fang; Vorranutch Itthibenchapong; Kajornsak Faungnawakij; Mahidol University; King Mongkut s University of Technology Thonburi; Thailand National Science and Technology Development Agency© 2018 Elsevier B.V. NiAl 2 O 4 spinel-type catalyst was successfully prepared by an incipient wetness impregnation method accompanied with high-temperature calcination at 1273 K for 10 h. The effect of reduction temperatures (773, 923, and 1073 K... degree at different temperatures. The TEM analysis revealed the formation of large particle size of the catalysts reduced at higher temperature. The highest product yield (94.3%) was achieved for the NiAl 2 O 4 reduced at 923 K. Interestingly, the spinelPublication Metadata only An improved mean field theory for mixed spinel ferrites(1995-09-02) I. M. Tang; S. Varamit; Mahidol UniversityThe standard mean field approach neglects the random disordering of magnetic and nonmagnetic ions with the sublattice of the mixed spinel ferrites. It is known that this disordering can lead to real effects. A mean field theory is developed in whichPublication Metadata only A molecular field theory for inverse spinel ferrite(1979-04-16) I. Ming Tang; Chomkwan Prayoonwech; Mahidol University; Faculty of ScienceA molecular field theory is developed for inverse spinel ferrites which takes into account the disorder arising from the random arrangement of two types of magnetic ions in the B sublattice. It is seen that the disorder gives rise to a localPublication Metadata only Local field fluctuations in the mixed spinel ferrite, Ni1-xZnxFe2O4(1999-03-20) I. M. Tang; S. Varamit; B. Wiwatanapataphee; Mahidol University; The Institute of Science and Technology for Research and Development, Mahidol UniversityThe magnetic properties of the mixed spinel ferrites Ni1-xZnxFe2O4 are studied with the framework of a mean field approach which takes into account the effects of random arrangements of the Zn and Fe ions in the A-sublattice and of the Ni and FeItem Metadata only Fabrication of glass-ceramics composite by infiltration of lithium tetraborate glass into porous magnesium aluminate spinel ceramic(2023-01-01) Kulrat N.; Busabok C.; Intarasiri S.; Dangtip S.; Khongwong W.; Mahidol UniversityMagnesium aluminate spinel (MAS) glass-ceramics composite has excellent mechanical and optical properties. It can be obtained from porous ceramic by infiltrating the proper choice of glass. In this study, porous MAS ceramic was preparedPublication Metadata only Enhancement of photocatalytic by Mn3O4 spinel ferrite decorated graphene oxide nanocomposites(2021-06-01) Tanawat Imboon; Jeerawan Khumphon; Khrongkhwan Yotkuna; I. Ming Tang; Sirikanjana Thongmee; Kasetsart University; Mahidol Universitybands from 250 to 550 nm. These bands arise from the d–d crystal field transitions of the tetrahedral Mn3+ species and indicate a distortion in the crystal structure. Photo-catalytic activity of spinel ferrite Mn3O4 NP’s by themselves was low but photo... with an interplanar d-spacing of 0.49 nm for (101) plane.2.Photocatalytic activity of spinel ferrite Mn3O4 nanoparticles by itself is low.3.Number of photoelectrons created depends on number of Mn3O4 on a given area of GO4.The bonding of the Mn3O4 to the GO sheetItem Metadata only Structural investigation and optical properties of cobalt aluminate pigments derived from thermal decomposition of mixed-metal nitrate co-crystals(2022-07-01) Yaemphutchong S.; Wattanathana W.; Chansaenpak K.; Singkammo S.; Kanjanaboos P.; Siri-apai P.; Janejobsakonkit S.; Pipattanaporn P.; Suetrong N.; Wannapaiboon S.; Hanlumyuang Y.; Mahidol UniversityIn this study, the coloration mechanism of cobalt aluminate spinel materials derived by thermal decomposition of the co-crystallized mixed-metal precursors has been reported. The structural alteration of cobalt aluminates, along with the origins... properties suggested that the coloration can be modified by controlling Co2+/Co3+ contents and their site occupancies in the spinel structure by adjusting calcination temperatures and selecting the counter ions with appropriate oxidizing power. The interplaysItem Metadata only Synergistic Effect of Zn Doping on the Structural, Optical, and Photocatalytic Properties of Sol–Gel Derived Spinel Ferrite for Tetracycline Photodegradation(2025-04-01) Nasir M.H.A.; Yasar M.; Khokhar A.M.; Fatima K.; Abbas M.; Ali M.; Mahmood F.; Almaary K.S.; Shah T.A.; Rao D.P.; Nasir M.H.A.; Mahidol University-doped spinel ferrite represents a significant advancement in the development of efficient recyclable photocatalysts for water treatment.
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