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Abstract: Nd2SiO5 ceramics were synthesized and their microwave dielectric properties were investigated. The hexagonal Nd4Si3O12 second phase disappeared and the pure monoclinic Nd2SiO5 phase could be obtained when the molar ratio of Nd2O3/SiO2 was 1:1.05 at 1450°C. The relative density of Nd2SiO5 ceramics increased with increasing temperature. The Nd2SiO5 ceramics sintered at 1500°C exhibited microwave dielectric properties: a dielectric constant (ε r) of 7.94, a quality factor (Q × f) of 38 800GHz and a temperature coefficient of resonant frequency (τ f) of −53ppm/°C. High resonant frequency led to a low dielectric constant and low Q × f value. Nd2SiO5 ceramics have a wide sintering temperature region. They are promising candidate materials for microwave passive components. [Copyright &y& Elsevier]

Reduced graphene oxide (rGO)-encapsulated MnGeO 3 microspheres have been yielded via a facile, scalable and environmentally friendly route. Hydrothermal method was utilized to recrystallize MnGeO 3 particles and form rGO encapsulation. Such rationally designed rGO-encapsulated MnGeO 3 microspheres afforded excellent electrochemical performances, i.e. high first discharge capacity of 1364 mAh g −1 and charge capacity of 810.8 mAh g −1 , and reversible capacity of 624.6 mAh g −1 after 50 cycles at a current density of 200 mA g −1 when they were employed as anode materials for Li ion batteries. These advantageous attributes make rGO-encapsulated MnGeO 3 microspheres the potential anode materials for Li-ion batteries. [ABSTRACT FROM AUTHOR]