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  • 1
    Electronic Resource
    Electronic Resource
    Fabrication and Characterization of In-Doped Zinc Oxide Nanodisks (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 121-123 (Mar. 2007), p. 127-130 
    Details
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Notes: In-doped ZnO nanodisks were successfully fabricated by thermal evaporation Zn, In2O3and graphite powder mixture without catalyst. Morphology, structures and components of ZnOnanodisks were investigated by SEM, HRTEM, EDS and X-Ray diffraction. ZnO nanodisks haveperfect hexagonal shape, with 1~3μm size and 40~100 nm in thickness. The nanodisks aresingle-crystalline ZnO with wurtzite structure and In content of nanodisks reaches 2.2%. The growthalong [0001] is suppressed leading to the formation of ZnO nanodisks. Room temperaturephotoluminescence spectra of the nanodisks shows that the UV emission peak blueshifts andbecomes broader after doping
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/23/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.121-123.127.pdf
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  • 2
    Electronic Resource
    Electronic Resource
    Erosive Wear Performance and Mechanism of Engineering Ceramic Materials (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 336-338 (Apr. 2007), p. 2462-2464 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: A slurry pot tester was used to evaluate the erosion behavior of alumina (Al2O3), zirconiatoughened alumina (ZTA), and silicon nitride ceramics. The eroded surface of sample was studied byscanning electronic microscope and the primary erosion wear mechanisms for ceramic materials wereanalyzed. On the same experimental condition, erosion wear resistance of materials follows this rule:Si3N4〉ZTA〉Al2O3. The key factor affecting erosive wear performance of ceramics is their microstructure.The primary erosive wear mechanisms for Al2O3, ZTA and Si3N4 ceramics are lateral crack propagation,whole grains pulled out and plastic deformation. The erosive wear performance of Si3N4 ceramic is thebest in this experiment, due to their microstructure morphology with elongated grains
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.2462.pdf
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  • 3
    Electronic Resource
    Electronic Resource
    Fabrication of Ultra-Fine Abrasive Polishing Pads by Gel Technique (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 532-533 (Dec. 2006), p. 468-471 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: In this paper, an experimental study was carried out to fabricate a new kind of ultra-fineabrasive polishing pad by means of gel technology. The polishing pad was then used to polishsilicon wafer on a nano-polishing machine. Optical microscope and ZYGO 3D surface analyzerwere applied to observe the surface morphologies of the silicon wafer. Meanwhile, surfacemorphology of ultra-fine abrasive polishing pad was observed by ESEM. No obvious gathering ofultra-fine grains were found on the ultra-fine abrasive pad. The surface roughness (Ra) of the siliconwafer was reduced to 0.3nm after being polished by the abrasives with average grain size of 10μm.Mirror surface can be realized after being polished with the polishing pad
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.532-533.468.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    Determination of phthalate esters in cosmetics by gas chromatography with flame ionization detection and mass spectrometric detection (2005)
    Oxford, UK : Blackwell Science Ltd
    International journal of cosmetic science 27 (2005), S. 0 
    Details
    ISSN: 1468-2494
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: A gas chromatography coupled with flame ionization detection (GC-FID) and mass spectrometric detection (MSD) method was developed to determine the six kinds of phthalate esters [dimethyl phthalate (DMP), diethyl phthalate (DEP), di-n-butyl phthalate (DBP), benzyl butyl phthalate (BBP), di(2-ethylhexyl) phthalate (DEHP) and di-n-octyl phthalate (DOP)] in cosmetics (solid, cream and liquid cosmetics). The cosmetics were extracted with methanol by ultrasonic and then separated with high-speed centrifugation. The upper clear layer was dried and filtered through a 0.45 μm pore diameter filter. The filtrate was injected into GC-FID/GC-MS for detection. GC-FID chromatogram was applied for qualitative analysis, external standard method was used for quantitative analysis. Confirmation of phthalate presence was undertaken by GC-EI-MS. The recovery range of all phthalates were between 92.0 and 110.0% with relative standard deviations between 1.95 and 5.92%. The low detection limits of the method were: 0.1 ng for DMP, DEP, DBP and BBP, 0.5 ng for DEHP and DOP. The method had advantages of high precision and sensitivity, simplicity of pretreatment. The method can be used to test the six kinds of phthalate esters in cosmetics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1467-2494.2005.00249.x
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  • 5
    Electronic Resource
    Electronic Resource
    Fabrication of Ultra-Fine Diamond Abrasive Tools by Sol-Gel (2004)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 471-472 (Dec. 2004), p. 426-430 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: In this paper, an experimental study was carried out to fabricate a new kind of ultra-fine diamond abrasive tools by means of sol-gel. The physical properties of the new diamond abrasive tools were evaluated in terms of the bulk density and hardness. The ultra-fine diamond tools were then used to polish granite on a vertical spindle grinding machine. SEM and optical microscope were applied to observe the surface morphologies of the diamond tools and granite. No obvious gathering of ultra-fine diamond grains were found in the new diamond abrasive tools, which exhibited a good wear-resistant ability in polishing. The granite surfaces polished by the new diamond tools were found to be basically smooth except few cracks originally existing in the granite
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/09/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.471-472.426.pdf
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  • 6
    Electronic Resource
    Electronic Resource
    Slurry Erosive Wear Characteristics of Engineering Ceramics for Hydraulic Machinery (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 280-283 (Feb. 2007), p. 1689-1692 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Engineering ceramics have a high application potential for wear-protection of different equipment used for electric power generating, mining and mineral industries. The ZTA (zirconia toughened alumina) and alumina (92%, 95%) have been prepared. Effects of varying the impact velocity and volume content of erodent particle and erosive time are investigated. Scanning electronmicroscopic examination of the eroded ceramic surfaces provides insights into the erosive wear mechanisms. The material removal processes include chipping out of lateral cracks caused by impact of the erodent particles, grain boundary cracking and grain pull out, as well as plastic deformation caused by the repeated sliding and impact of the particles
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/49/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.280-283.1689.pdf
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  • 7
    Electronic Resource
    Electronic Resource
    Effects of Cooling Methods on Temperatures in Vertical Grinding Stone (2004)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 259-260 (Mar. 2004), p. 383-388 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/47/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.259-260.383.pdf
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  • 8
    Electronic Resource
    Electronic Resource
    Local Stress Field for Torsion of a Penny-Shaped Crack in a Functionally Graded Strip (2004)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 261-263 (Apr. 2004), p. 123-128 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The torsion of a penny-shaped crack in a functionally graded strip is considered. Hankel transform is used to reduce the problem to solving a Fredholm integral equation. The crack tip stress field is obtained by considering the asymptotic behavior of Bessel function. Investigated are the effects of material property parameters and geometry criterion on the stress intensity factor. Numerical results show that increasing the gradient of shear modulus can suppress crack initiationand growth, and that the stress intensity factor varies little with the increasing of the strip's highness
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/47/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.261-263.123.pdf
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  • 9
    Electronic Resource
    Electronic Resource
    Abrasive Dispersing in Ultra-Fine Diamond Tools (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 381-382 (June 2008), p. 521-524 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: In this paper, the influences of abrasive size, abrasive concentration and admixture wayon the abrasive dispersing of the sintered ultra-fine diamond tool were systemically investigated.Then, a comparison of the abrasive dispersing was made between the sintered ultra-fine diamondtool and the newly developed ultra-fine diamond tool by gel technique. ESEM was applied toobserve the abrasive dispersing of the sintered and gel-coupled ultra-fine diamond tools. Theabrasive dispersing was quantitatively evaluated by the statistic laws of grit spacing in a certain area.Experimental results indicated that the dispersing was mainly influenced by the abrasive size. Theultra-fine abrasive tended to agglomerate with the decrease of grit sizes due to the increase ofsurface energies. The abrasive concentration and admixture way had few effects on abrasivedispersing. The abrasive dispersing of the sintered diamond tool was worse compared with thegel-coupled ultra-fine diamond tool
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.381-382.521.pdf
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  • 10
    Electronic Resource
    Electronic Resource
    Influences of Machining Parameters on Silicon Wafer Polished with Gel-Coupled Ultra-Fine Abrasive Polishing Pads (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 359-360 (Nov. 2007), p. 279-284 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: In this paper, a newly developed ultra-fine abrasive polishing pad by gel technology wasadopted to polish silicon wafer on a nano-polishing machine. In order to evaluate the machiningperformances of the polishing pad, the influences of abrasive sizes, abrasive concentration andpolishing parameters (pressure, rotating speed and machining time) on the silicon wafer wereinvestigated respectively. Optical microscope and ZYGO 3D surface analyzer were applied toexamine the surface morphologies and surface roughness of the polished silicon wafer respectively.The experimental results showed that the surface roughness of silicon wafer decreased with thedecreasing of abrasive grits and the increasing of abrasive concentration and polishing parameters(pressure, rotating speed and polishing time) when polishing silicon wafer with the polishing padcontaining Al2O3 abrasive. When abrasive concentration, polishing pressure and polishing timereached certain values, few changes would happen for the silicon wafer
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.359-360.279.pdf
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