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Li, Dingqiang; Xu, Yun Bo; Lin, Donghai

doi:10.1023/a:1004884009018

Cited by 35 publications

(33 citation statements)

References 5 publications

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“…The molecular structure of modified coal-tar pitch has been studied in our previous research [8]. The results show that the modified coal-tar pitch has many methyl and methylene functional groups, which result from condensation and polymerization between DVB and small molecules of coal-tar pitch.…”

Section: Coal-tar Pitch and Modified Pitches Characteristicsmentioning

confidence: 99%

“…The fibers are made of polymer chains which small molecules of coal-tar pitch form by cross-linking with DVB. The polymer chains develop, and get together to form the fibers presenting even distributing and good linearity under the action of shear stress and temperature [8]. …”

Section: Coal-tar Pitch and Modified Pitches Characteristicsmentioning

confidence: 99%

“…Thus, a higher carbon yield can be acquired when the modified coal-tar pitch is carbonized. In this paper, coal-tar pitch has been modified with divinylbenzene (DVB) in the presence of p-toluene sulfonic (PTS) acid [8]. Carbonization behavior of the modified coal-tar pitch and optical texture of resultant semi-cokes are studied.…”

Section: Introductionmentioning

confidence: 99%

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Carbonization behavior of coal-tar pitch modified with divinylbenzene and optical texture of resultant semi-cokes

Lin

Chang-zheng

et al. 2004

Journal of Analytical and Applied Pyrolysis

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Section: Coal-tar Pitch and Modified Pitches Characteristicsmentioning

confidence: 99%

Section: Coal-tar Pitch and Modified Pitches Characteristicsmentioning

confidence: 99%

See 1 more Smart Citation

Carbonization behavior of coal-tar pitch modified with divinylbenzene and optical texture of resultant semi-cokes

Lin

Chang-zheng

et al. 2004

Journal of Analytical and Applied Pyrolysis

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“…In this regard, NiAl, FeAl and Fe 3 Al have been found to be quite promising [1,[3][4][5][6]8,9]. The high temperature oxidation resistance of these materials is attributed to the formation of a continuous, adherent Al 2 O 3 layer on exposure to oxidizing atmospheres that provides a good diffusion barrier [1,8,10,11]. Nevertheless, these intermetallic compounds have got some deficiencies.…”

Section: Introductionmentioning

confidence: 99%

Characterization of aluminides formed on superalloy 690 substrate

Dutta

Majumdar

Limaye

et al. 2011

Trans Indian Inst Met

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Ni-Cr-Fe based superalloy 690 substrate, pack aluminized at 1273 K, revealed formation of multilayer comprising (NiCr)Al + Cr 5 Al 8 , Ni 2 Al 3 + Cr 5 Al 8 , NiAl and J phases. Knoop hardness number varied from 225 to 1142 along the cross-section. Wear and friction tests on aluminized specimen were performed in dry medium using reciprocating sliding wear and friction machine with tungsten carbide ball at 15 N load with frequencies at 10, 15 and 20 Hz. The coefficient of friction, the static ones were obtained in the vicinity of 0.2, 0.3 and 0.5, while dynamic ones were 0.3, 0.4 and 0.4 respectively.

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“…Electromechanical filters also provide excellent aging and thermal-stability characteristics [4]. With the introduction of microelectromechanical systems (MEMSs), the application of electromechanical filters to signal processing has become more feasible, from highfrequency to radio-frequency regions [5][6][7][8]. An electromechanical filter bank constructed from silicon beams for a high-frequency communication system was recently investigated [9].…”

Section: Introductionmentioning

confidence: 99%

Design considerations for an acoustic MEMS filter

Shen¹,

Fang

Young³

2004

Microsystem Technologies

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Microelectromechanical system (MEMS) devices exhibit characteristics that make them ideal for use as filters in acoustic signal processing applications. In this study, a MEMS filter is constructed from multiple mechanical structures (e.g. cantilever beams) and a differential amplifier. The outputs of the structures are then processed by the differential amplifier to achieve the filter functionality. The important parameters of the mechanical structures and the MEMS filters are investigated using a simulation approach, including the structural damping factors, the normalized frequency ratios (NFR) of the MEMS filters, the number of mechanical structures required to construct individual MEMS filter, and the spatial arrangement of the multiple mechanical structures relative to the differential amplifier. Furthermore, the mutual coupling effects among these parameters are evaluated by detailed simulations. The simulation results show that a plot of the NFR versus the damping factors can be used to determine the optimal parameters for the mechanical structures. The number of mechanical structures required to construct a MEMS filter must equal 2 n , with n as an integer, and these mechanical structures should be arranged as a geometric series with increasing resonant frequencies and with specific connections to the differential amplifier.

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Untitled

Cited by 35 publications

References 5 publications

Carbonization behavior of coal-tar pitch modified with divinylbenzene and optical texture of resultant semi-cokes

Carbonization behavior of coal-tar pitch modified with divinylbenzene and optical texture of resultant semi-cokes

Characterization of aluminides formed on superalloy 690 substrate

Design considerations for an acoustic MEMS filter

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