【摘 要】
：
A series of Gd-doped Li-Ni ferrites with the formula of LiNi0.5GdxFe2-xO4 where x=0.00～0.08 in steps of 0.02, were prepared by thermolysis of oxalate precursors
【机 构】
：
Department of Chemistry
论文部分内容阅读
A series of Gd-doped Li-Ni ferrites with the formula of LiNi0.5GdxFe2-xO4 where x=0.00～0.08 in steps of 0.02, were prepared by thermolysis of oxalate precursors obtained by rheological phase reaction. The structure, morphology, and the magnetic properties of the samples were characterized by powder X-ray diffraction (XRD), atomic force microscopy (AFM) and a vibrating sample magnetometer (VSM). A single spinel phase was obtained in the range of x=0.00～0.04. The lattice parameters of the Gd-doped samples were larger than that of pure Li-Ni ferrite, and increased in the range of 0.00≤x≤0.04, then decreased up to x=0.08, because of the formation of the secondary phase (GdFeO3). All samples were spheric particles with an average size of about 100 nm, but agglomerated to some extent. The hysteresis loops indicated that the saturation magnetization decreased gradually with increasing Gd content, while the variation of coercivity was related to the microstructure of the Gd-doped samples.
其他文献
辽宁省地热温泉资源分布广泛，对地热资源的利用距今已有1250余年的历史。目前辽宁省14个市都发现了地热资源，具有得天独厚的资源优势。
A PGSTAT 30 and a BOOSTER 20A were used to measure cell impedance. Electrical conductivity was gained by the Continuously Varying Cell Constant Technique. Elect
Nafion/polypyrrole and Nafion/Dimethysulfoxid (DMSO) organic coatings were prepared on the surface of pure magnesium by simple immersion and heat treatment. The
Two kinds of CBGA (ceramic ball grid array) assemblies were made by reflow soldering process using two different Pb-free solders. Microstructural evolution and
探讨了在居室设计教学中应注重培养学生的设计性、市场性、技术性、协作性意识。
The technique of microwave irradiation induced free radical bulk- polyaddition reactions in porous wood flour was used to modify wood flour. The behaviors of th
Tb0.22Dy0.48Ho0.35Fe2 quaternary alloys are prepared by melting-top casting-annealing process. X-ray diffraction reveals that the alloy is single phase polycrys
The morphology and corrosion behavior of Ni/Al2O3 composite coatings prepared using double-pulsed electrodepositing technique after oxidized under 800℃ NaCl de
Low cost silicon carbon nanometer powder was synthesized by carbothermal reduction method with nanometer SiO2 and carbon as raw material. Its synthesis thermody
The development and application of a new solution is demonstrated for the type-curve analysis and interpretation of well test data from a multiwell reservoir sy