Gamma iron oxide

Temperatures reached during phosphate-based cleaning programs are only modest, and under these lower temperature conditions the passivated film consists of gamma iron oxide (yFe203) together with primary ferrous phosphate [Fe2H2(P04)2] and tertiary ferrous phosphate [Fe3(P04)2]. 

Nanocrystalline gamma iron oxide (y-Fe203) recently been studied as a gas sensing material, has been synthesised at 70°C using sonication-assisted precipitation technique [21]. The synthesised material was then used for fabricating the... 

D.E. Ovsienko, G.AAlflntsev Crytal Growth from the Melt/Experimental Investigation of Kinetics and Morphology AH.Monish Morphology and Physical Properties of Gamma Iron Oxide... 

Shmakov et al. (1995) TEM Gamma-iron oxide Vacancy ordering + + n.a. Evolution of real structure... 

Fillers magnetite (Fe304) with micro- and nano- size and carbonyl iron powder CIP were obtained from Sigma Aldrich, gamma iron oxide (y-Fe203) was supplied from ABCR, fumed silica AEROSIL A380 was purchased from Evonik Degussa. 

Tanaka S, Nakagawa K, Kanezaki E, Katoh M, Murai K-1, Moriga T, Nakabayashi 1, Sugiyama S, Kidoguchi Y, Miwa K (2005) Catalytic activity of iron oxides supported on gamma-Al Oj for methane oxidation. J Jpn Pet Inst 48 223... 

Waite, T.D., and A. Torikov. 1987. Photoassisted dissolution of colloidal iron oxides by thiol-containing compounds. 2. Comparison of lepidocrocite (gamma-FeOOH) and hematite (alpha-Fe203) dissolution. J. Colloid Interface Sci. 119 228-235. 

Gracien, E. B., Ruimin, Z., LiHui, X., Kanza Kanza, L., Lopaka, I. 2006. Effects of pH on the morphology of iron oxides synthesized under gamma-irradiation. Journal of Radioanalytical and Nuclear Chemistry 270 473-478. 

Quinton, J.S., Dastoor, PC. (2000) Conformational dynamics of gamma-APS on the iron oxide surface an adsorption kinetic study using XPS and ToF-SIMS. Surf. Interface Anal, 30,21-24. 

S.M. Clark, S.G. Prilliman, C.K. Erdonmez, A.P. Alivisatos, Size dependence of the pressure-induced gamma to alpha structural phase transition in iron oxide nanocrystals. Nanotechnology 16(12), 2813-2818 (2005)... 

AES) indicate that iron and carbon are dispersed over both the silicon and the silicon oxide region. Cross-sectional TEM observation [42] of the substrates show that particles on top of silicon oxide surfaces are made of pure gamma iron (fee Fe), and the silicon surface diffraction patterns show the presence of iron sili-cide and iron silicate, where such materials are not effective for carbon nanotube catalysis. 

Ballestra et al. [32] described a radiochemical measurement for determination of "technetium in rain, river, and seawater, which involved reduction to technetium (IV), followed by iron hydroxide precipitation and oxidation to the heptavalent state. Technetium (VII) was extracted with xylene and electrode-posited in sodium hydroxide solution. The radiochemical yield was determined by gamma counting on an anticoincidence shield GM-gas flow counter. The radiochemical yield of 50 to 150 litre water samples was 20-60%. 

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