Guangdong Monalisa Ceramics Co.

Foshan, China

Guangdong Monalisa Ceramics Co.

Foshan, China

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Fei J.,Shaanxi University of Science and Technology | Fei J.,Guangdong Monalisa Ceramics Co. | Luo W.,Shaanxi University of Science and Technology | Pan L.,Guangdong Monalisa Ceramics Co. | And 3 more authors.
Gongneng Cailiao/Journal of Functional Materials | Year: 2015

Based on excellent performance of carbon fabric and nano-molybdenum disulfide, the friction materials with different content of MoS2 were prepared to adapt the unusual operating conditions such as high rotating speed, excessive load and insufficient lubrication and so on. All samples were obtained by dipping impregnation solution with different mass fractions of nano-molybdenum disulfide. The surface morphology and tribology behavior were investigated by scanning electron microscope (SEM), confocal optical microscope (C130) and wet friction material test machine. Experimental results showed that adding nano-molybdenum disulfide could improve the material density and surface roughness. The dynamic friction coefficient decreased very little only about 2.6% with the MoS2 content no more than 5%, but it decreased 14.2% with 8% MoS2. With addition of MoS2, the fiber pullout or fracture was significantly reduced leading to greatly decrease of the wear rate. ©, 2015, Journal of Functional Materials. All right reserved.


Zhang X.,Shaanxi University of Science and Technology | Cao L.,Shaanxi University of Science and Technology | Huang J.,Shaanxi University of Science and Technology | Liu Y.,Guangdong Monalisa Ceramics Co. | Li J.,Shaanxi University of Science and Technology
Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society | Year: 2012

The wolframite zinc tungstate nanocrystallites were prepared by a microwave hydrothermal method in the absence of template with Na 2WO 4·2H 2O and Zn(COOCH 3) 2·2H 2O as start materials. The phase, morphology and optical properties of the as-prepared samples were characterized by X-ray diffraction, transmission electron microscopy and UV-Vis absorption spectra, respectively. The results indicated that the wolframite ZnWO 4 nanocrystallites can be obtained by the microwave hydrothermal method at 180°C for only 10 minutes. The morphology of ZnWO 4 nanocrystallites changed from short to elongated rod-like with increasing microwave hydrothermal time. The as-prepared ZnWO 4 nanocrystallites have a strong absorption in ultraviolet band. The corresponding band-gap of the ZnWO 4 nanocrystallites increased with the increase of reaction time, which can be controlled in the range of 3.77-3.89 eV.


Zhang X.-W.,Shaanxi University of Science and Technology | Cao L.-Y.,Shaanxi University of Science and Technology | Huang J.-F.,Shaanxi University of Science and Technology | Liu Y.-J.,Guangdong Monalisa Ceramics Co. | Li J.,Shaanxi University of Science and Technology
Wuji Cailiao Xuebao/Journal of Inorganic Materials | Year: 2012

The Wolframite ZnWO4 nanocrystallites were prepared by a facile, template-free microwave hydrothermal method using Na2WO4·2H2O and Zn(COOCH3)2·2H2O as starting materials. The phase, morphology and optical properties of as-prepared samples were characterized by X-ray Diffraction (XRD), Transmission Electron Microscope (TEM), UV-Vis absorption spectra (UV-Vis) and photoluminescence spectroscopy (PL). Results indicate that ZnWO4 nanocrystallites have a preferential orientation growth along the (100) planes, and the morphology of ZnWO4 nanocrystallites change into rodlike structure with the increase of microwave hydrothermal time. An intense blue PL emission with a 460 nm wavelength is observed when the as-prepared ZnWO4 nanocrystallites are excited by a 295 nm wavelength, and they show a strong absorption in the ultraviolet region. The ZnWO4 nanocrystallites whose orientation degree of (100) planes is 0.24 with the particle sizes of 50-60 nm show the best photocatalytic properties.

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