Formulation and Performance of Vitrified Bond Prepared by Sol-Gel for Precision Grinding Using Orthogonal Test

ABSTRACTVarious forms of vanadium pentoxide, including xerogel, aerogel, and aerogel-like forms, were prepared by sol-gel synthesis and processed by novel procedures following synthesis. It was demonstrated that the intrinsic thermodynamics of lithium intercalation of the ARG and ARG-like materials prepared by solvent exchange processes involving methyl formate (MF/ARG and MF/ARG-xslike) are identical, while they are drastically different from those of the parent XRG, which gives rise to significantly increased specific energies for the MF/ARG or MF/ARG-like as lithium intercalation hosts. All three forms are capable of reversibly intercalating up to four moles of Li+ ions per mole of V205 electrochemically and can be cathode candidates for rechargeable lithium batteries. Various processing methods for fabricating composite electrodes with the XRG led to specific capacity in the range of 300 to 350 mAh/g at C4Li/ 20 rate, and good cyclability.

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Development of Vitrified Bond CBN Wheel for Internal Precision Grinding of the Air-Conditioner Compressor Piston Hole

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.304-305.29 ◽

2006 ◽

Vol 304-305 ◽

pp. 29-32 ◽

Cited By ~ 1

Author(s):

Hang Gao ◽

Y.G. Zheng ◽

W.G. Liu ◽

Jian Hui Li

Keyword(s):

Cost Effective ◽

Grinding Wheel ◽

Manufacturing Cost ◽

Air Conditioner ◽

Grinding Wheels ◽

Precision Grinding ◽

Grinding Performance ◽

Compressor Piston ◽

Vitrified Bond ◽

Cbn Grinding Wheel

Manufacturing of vitrified bond CBN wheels for internal precision grinding of the air-conditioner compressor piston hole is still big challenge to all of the domestic manufacturers. Recently, by choosing pre-melting mixed CBN abrasives and a proper sintering process, a cost-effective method was conceived to produce grinding wheels of comparative quality. The grinding performance of wheels was evaluated with a series of internal precision grinding of compressor piston hole. Experimental results show that the vitrified bond CBN grinding wheel produced by this method has better grinding performance, and can be substitute to the same type of grinding wheels imported. But the manufacturing cost is only 60% of the wheel imported according to estimation.

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Formation of Cobalt Doped Zinc Oxide Photocatalyst for Methyl Orange Degradation

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.264.211 ◽

2017 ◽

Vol 264 ◽

pp. 211-214 ◽

Cited By ~ 2

Author(s):

Farah Iddayu Abu Bakar ◽

Katerina Anak Birang ◽

Mohd Azam Mohd Adnan ◽

Jeefferie Abd Razak ◽

Syahriza Ismail

Keyword(s):

Zinc Oxide ◽

Methyl Orange ◽

Sol Gel ◽

Morphological Observation ◽

X Ray Diffraction ◽

Methyl Orange Degradation ◽

Zno Nanostructure ◽

Dopant Level ◽

And Performance ◽

Co Doped

The formation of cobalt (Co) doped zinc oxide (ZnO) as photocatalyst for photodegradation of methyl orange dye was investigated. The ZnO photocatalyst was produced with different concentration of Co by using sol gel method. The hexagonal wurtzite and zincite structure were successfully formed through this method. The morphological observation of nanorod and nanodisk structure formed was done by Field Emission Scanning Electron Microscope (FESEM). While, the structural properties of Co doped ZnO were identified by X-ray Diffraction (XRD) and Raman spectroscopy. The degradation performance of methyl orange was assessed and performance of photocatalytic activity was correlated to the amount of dopant level and oxygen vacancy of photocatalyst. There is an optimum amount of Co that can be doped into ZnO nanostructure in order to provide better degradation of methyl orange.

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Preparation and Performance of Porous Membrane Materials Using the Sol-Gel Method

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.33.251 ◽

2010 ◽

Vol 33 ◽

pp. 251-253

Author(s):

Peng Zhang ◽

Gang Chen ◽

Bin Guo ◽

Shu Kang Cheng

Keyword(s):

Sol Gel ◽

Porous Membrane ◽

Silica Particles ◽

High Tech ◽

Experimental Conditions ◽

Preparation Methods ◽

Gel Method ◽

Membrane Materials ◽

Sol Gel Method ◽

And Performance

Porous membrane materials have the universal use, so it is widely considered as one of the most promising high-tech. Different membranes have different preparation methods. In this paper, the sol-gel method was applied to prepare silica particles using ammonia as catalyst of TEOS hydrolysis, then silica particles were mixed with polyethylene, and finally silica particles were dissolved with hydrofluoric acid, leaving holes, the porous materials were obtained. The results show that: (1) In this experimental conditions, the size of silica particles are closely related to the water content of the system. (2) The size of silica particles affects the agglomeration of particles. The size of silica particles are smaller, the agglomeration is more obvious. (3) As the content of PE increases, the porosity of the samples decreases continuously; in theory, when the content of silica is low, the hole will be greater.

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Research on Sol-Gel Transition Process of Gelatin

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.683.474 ◽

2013 ◽

Vol 683 ◽

pp. 474-478

Author(s):

Xi Liang Chen ◽

Qing Nan Shi

Keyword(s):

Numerical Simulation ◽

Sol Gel ◽

Transition Process ◽

Controlled Drug Release ◽

Simulation Method ◽

Simulation Research ◽

Gelation Process ◽

Sol Gel Transition ◽

And Performance ◽

Gel Transition

As a kind of functional material, gelatin gel is widely used in controlled drug release, biological tissue engineering, photographic and food industries. Plenty of studies on the gelatin gel have been carried out by researchers, which include gelation mechanisms, gelation kinetics, analysis on the crosslinked structure and macroscopic performance during the gelation process. Numerical simulation is a new method used in the study of gelatin sol-gel transition process, which can make up for the deficiency of the experimental research. E.g., the dynamic gelation process makes it difficult to measure the structural and performance parameters in time and space scales in experiments. However, these problems have been solved by numerical simulation method in our previous work. The experimental, theoretical and numerical simulation research on sol-gel transition of gelatin is reviewed, and the progress and difficulties in this field are discussed.

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Preparation and Characterization of Polylactic Acid Fiber Enhanced Hydroxyapatite/Chitosan Composites

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.368-373.321 ◽

2011 ◽

Vol 368-373 ◽

pp. 321-325

Author(s):

Hai Rong Yin ◽

Quan Xian Zu ◽

Yang Wu

Keyword(s):

Polylactic Acid ◽

Composite Plate ◽

Influence Factors ◽

Orthogonal Test ◽

Pecking Order ◽

Bending Modulus ◽

Chitosan Matrix ◽

Ft Ir ◽

And Performance ◽

Chitosan Composite

A novel hydroxyapatite/chitosan composite plate enhanced by polylactic acid fiber is prepared via in–situ hybridization in the semipermeable mold. The influence factors of the composites are evaluated by orthogonal test; FT–IR, XRD and SEM are also used to determine the relevance between the composition and performance. Analyses show that: hydroxyapatite with weak crystalline state is generated in the composites; there is hydrogen bonding associating existing in the complex system; preferable interface junction is created between the fiber and hydroxyapatite /chitosan matrix, which is able to play benign potentiation to the mechanical strength. Orthogonal test finds that the pecking order of the influencing factors to physical properties is: fiber content > fiber length > hydroxyapatite content. HA/CS composite plate enhanced by PLA–fiber can get a significantly increase on flexural strength and bending modulus, therefore, it will be a kind of potential orthopaedic materials which possesses the ability of completely degraded.

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Characterisation of PZT in Thin Film Bulk Acoustic Wave Resonators

MRS Proceedings ◽

10.1557/proc-1075-j03-03 ◽

2008 ◽

Vol 1075 ◽

Author(s):

Janine Conde ◽

Paul Muralt

Keyword(s):

Thin Films ◽

Acoustic Wave ◽

Bias Voltage ◽

Sol Gel ◽

Low Frequency ◽

Bulk Acoustic Wave ◽

Coupling Constant ◽

Pzt Thin Films ◽

Best Response ◽

And Performance

ABSTRACTPb(Zr0.53, Ti0.47)O3 (PZT) thin films are potentially interesting as piezoelectric layer in bulk acoustic wave (BAW) resonators. We investigated properties and performance of {111} and {100} textured, dense films deposited by sol-gel techniques in the frequency range of 1 to 2 GHz. The resonators were fabricated on Si wafers using deep silicon etching to create a membrane structure and using platinum as top and bottom electrodes. The best response of the resonators was observed at a bias voltage of −15kV/cm with values of around 10% for the coupling constant and around 50 for the quality factor. This voltage corresponds to the maximal value of the piezoelectric constant d33 and minimal value of the dielectric permittivity measured as a function of the electric field. Resonance and antiresonance frequencies were strongly influenced by a bias voltage, showing a hysteretic behaviour as expected for ferroelectrics. Both of these frequencies shifted in the same direction. As a consequence, the dc voltage can be potentially used to shift the whole band of a filter. In unipolar operation, the coupling constant could be varied from 6 to 10 %. Materials parameters were extracted from the admittance as a function of frequency. Dielectric, piezoelectric and elastic properties of textured PZT films are reported and compared to direct (low frequency) measurements and to literature values. It was found that PZT thin films have lower stiffness than the one of PZT bulk ceramics and it was observed that {111}-textured films are stiffer than {100}-textured films.

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