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23rd Symposium and Annual Meeting of International Society for Ceramics in Medicine, ISCM 2011

作者： Çetin, Ali Emrah Simşek, deniz Çiftçioglu, Muhsin Akdeniz, Yelda Özmihçi, Filiz Yetkiner, Arzu Aykut Izmir Technology Development Zone MGM Material Technologies R and D Engineering A1-38 IYTE Campus Urla Izmir 35430 Turkey Urla Izmir 35430 Turkey Department of Pediatric Dentistry Faculty of Dentistry Ege University Izmir 35100 Turkey

ISBN: (纸本)9783037852552

The goal of the present work was to investigate the effects of several cement preparation parameters on setting and hardening reaction mechanisms and hydroxyapatite (HA) cement properties. A central composite experimental design (CCd) was conducted by choosing particle size, solid to liquid ratio, pH, seed concentration and buffer concentration as design parameters along with compressive strength and setting time being the responses. Tetracalcium phosphate (TTCP) powders were prepared by heat treatment of calcium and phosphate source mixtures in the 1200-1400°C temperature range followed by quenching to room temperature in a dessicator. The second phase used in the formulations (brushite) was prepared by aqueous chemical methods. A series of HA pastes/cements were prepared by changing the above mentioned design parameters. Cements were characterized by a standardized setting time test, mechanical testing machine, SEM and Xrd. HA cements with the desired properties can be formulated by using CCd in which the responses were expressed by a second order polynomial equation of the parameters. Compressive strengths for the majority of HA cements were determined to be in the 100-160 MPa range which is significantly higher than those reported in the literature. © (2012) Trans Tech Publications.

关键词： Cements

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Single-shot X-ray phase-contrast imaging using two-dimensional gratings

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AIP Conference Proceedings 2012年第1期1466卷 29-34页

作者： Genta Sato Hidenosuke Itoh Kentaro Nagai Takashi Nakamura Kimiaki Yamaguchi Takeshi Kondoh Soichiro Handa Chidane Ouchi Takayuki Teshima Yutaka Setomoto Toru den Frontier Research Center Corporate R&D Headquarters Canon Inc. 3-30-2 Shimomaruko Ohta-ku Tokyo 146-8501 Japan Optics Technology Development Center Corporate R&D Headquarters Canon Inc. 23-10 Kiyohara-Kogyodanchi Utsunomiya Tochigi 321-3231 Japan Nanotechnology R&D Center Corporate R&D Headquarters Canon Inc. 3-30-2 Shimomaruko Ohta-ku Tokyo 146-8501 Japan

We developed a two-dimensional gratings-based X-ray interferometer that requires only a single exposure for clinical radiography. The interferometer consisted of a checkerboard phase grating for π phase modulation and a latticed amplitude grating. Using a synchrotron radiation source, the phase grating modulates the X-rays and generates a self-image, transformed to a moiré fringe by the amplitude grating. To allow use of a conventional X-ray tube, the latticed source grating was installed downstream from the X-ray tube. differential phase-contrast and scattering images in two orthogonal directions were obtained by Fourier analysis of the single moiré fringe image and an absorption image. results show that characteristic features of soft tissue in two orthogonal directions were clearly shown in the differential phase-contrast images.

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Experiments of Air-pocket Movement in an 18.2odownward 240-mm Conduit

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Procedia Engineering 2012年 28卷 791-795页

作者： Ting Liu James Yang River Engineering Royal Institute of Technology (KTH) SE-100 44 Stockholm Sweden Vattenfall Research & Development (R&D) SE-814 26 Älvkarleby Sweden

Experiments are carried out in a test rig, consisting of a Plexiglas pipe with an inner diameter of 240 mm and an inclination of 18.2o, to investigate air-water two-phase flows in conjunction with bottom spillways. results show that the critical velocity, which is the minimal water velocity to start moving an air pocket, in the rough pipe, is independent of the air-pocket volume; in the smooth pipe it doesn’t increase with increasing diameter as much as the previous researchers indicated. Pipe roughness doesn’t affect the velocity of the air-pocket when it moves upstream in the downward inclined pipe.

关键词： two-phase flow Air pocket Critical velocity roughness effect diameter effect

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decarburization of ferrochrome and high alloy steels with optimized gas and slag phases towards improved Cr retention

Decarburization of ferrochrome and high alloy steels with op...

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Ninth International Conference on Molten Slags,Fluxes and Salts(MOLTEN12)

作者： Mselly M.NZOTTA Seshadri SEETHArAMAN Research & Development(R&D) Process Development(Metallurgy)Uddeholms ABHagforsSweden. Division of Materials Process Science Royal Institute of TechnologyStockholmSweden.

Chromium is a high value metal and the retention of the same during the refining of high carbon ferrochrome(HCFeCr) as well as high alloy steel has significant economic and environmental impacts. The loss of chromium ... 详细信息

关键词： CO2 Cr retention partial pressure decarburizer temperature control

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Evaluation of Performance on Crumb rubber Modified Asphalt Mixture

Evaluation of Performance on Crumb Rubber Modified Asphalt M...

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ISAP2012重载沥青路面和桥面铺装专题会议

作者： Yuming dong Yiqiu Tan Liying Yang School of Transportation Science & Engineering Harbin Institute of Technology(H.I.T) R&D Center Beijing Municipal R & B Building Material Group Co.Ltd

＜正＞This paper investigates performance of crumb rubber modified（CrM） asphalt *** different asphalt mixtures containing two types of asphalt binder（90#original asphalt;CrM asphalt） were used to prepare Marshall specimens and determine optimum asphalt *** performances of asphalt mixes were evaluated by wheel rutting test（WrT）（dynamic stability（dS））,midpoint beam bend test（MBBT） at the low temperature,indirect tensile test（IdT）at the freezing＆thawing *** gyratory compactor（SGC） specimens also were

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Enzymatic characterization of β-glucosidase and endo-glucanase from citrus peel degrading fungi,Penicillium Italicumi

Enzymatic characterization of β-glucosidase and endo-glucan...

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The 12th Japan-China-Korea Joint Symposium on Enzyme Engineering

作者： Jeong-Jun Yoon Ah reum Park Sung Koo Lee Young Min Lee Jung-Hoon Sohn Jae Jin Kim Green Materials Technology Center Technology Application DepartmentKorea Institute of Industrial Technology(KITECH) IT Convergence material R&D Group Manufacturing System R&D DepartmentKorea Institute of Industrial Technology(KITECH) Division of Environmental Science & Ecological Engineering Korea University Industrial Biotechnology and Bioenergy Research Center Korea Research Institute of Bioscience and Biotechnology(KRIBB)

Introduction degradation and conversion of lignocellulosic biomass is attracting attention because of its potential for the development of a sustainable environmentally friendly bioenergy,biorefining and biomaterials industry(1).It can be converted into useful products such as soluble sugars,ethanol,and industrially useful *** a linear polymer of d-glucose residues linked byβ-1,4-glycosidic bonds,cellulose is hydrolyzed by

关键词： Enzymatic characterization of glucosidase and endo-glucanase from citrus peel degrading fungi,Penicillium Italicumi

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Exploration on use of ferrofluid in power transformers

Exploration on use of ferrofluid in power transformers

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International Conference on Properties and Applications of Properties and Applications of dielectric materials

作者： Sushil Chaudhari Shubhangi Patil rahul Zambare Sruti Chakraborty Global Research and Development Crompton Greaves Mumbai India Global R&D Crompton Greaves Mumbai Department of Chemical Technology NMU Jalgaon India

during normal operating conditions, the thermal fluctuation in a power transformer is controlled by the mineral insulating oil that acts as cooling media and keeps the transformer in thermal equilibrium. Feasibility of ferrofluid in power transformers and compatibility with the transformer components have been quite an area of interest even after it has surfaced as a possible dielectric fluid with enhanced heat dissipation capacity. The experimental contributions in this research are dedicated towards the comparison of ferrofluid and naphthenic oil with kraft paper where major emphasis has been laid on the results obtained from long term laboratory scale ageing of ferrofluid for 61days at 393 K (120°C) with respect to the dissolved gas analysis (dGA), moisture, and degree of polymerization (dP) of solid insulation along with oxidation stability and rotating Bomb Oxidation Test (rBOT) with kraft paper.

关键词： Polymers Gases Oxidation Stability analysis Moisture Copper Educational institutions

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Fabrication of high aspect grating using bonded substrate for X-ray refraction imaging by Talbot-Lau interferometer

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AIP Conference Proceedings 2012年第1期1466卷 181-186页

作者： Takuji Tada dai Murakoshi Hiroyasu Ishii Atsushi Hashimoto Yasuhisa Kaneko Wataru Ito Toshitaka Agano Medical Systems Research & Development Center R&D Management Headquarters FUJIFILM Corp. 798 Miyanodai Kaisei-machi Ashigarakami-gun Kanagawa 258-8538 Japan Imaging Technology Center R&D Management Headquarters FUJIFILM Corp. 798 Miyanodai Kaisei-machi Ashigarakami-gun Kanagawa 258-8538 Japan

In order to improve the image quality of X-ray refraction images using a Talbot-Lau interferometer, we have been attempting to fabricate gratings with high aspect ratio. In our attempt, deep grooves of grating structure were channeled on a Si substrate bonded by Au diffusion bonding method, and the grooves were filled with Au where the Au layer used for the bonding Si substrate was acting as a seed layer of Au electroplating. From the results of a visibility measurement and a cross sectional SEM image, it was confirmed that the grooves with a pitch of 5.8 μm and a depth of 100 μm could be successfully filled with Au over a large area of 72×80 mm2. Using this grating, the X-ray refraction images for the cartilage of a knee joint of a livestock pig could be obtained where SPS method was employed for the single-shot image acquisition.

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Experiment study on micro-structure on different crystallographic planes of mc-Si etched in alkaline solution

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Science China(Technological Sciences) 2012年第6期55卷 1509-1514页

作者： WANG KunXia FENG ShiMeng XU HuaTian TIAN JiaTong YANG ShuQuan HUANG JianHua PEI Jun Department of Physics Shanghai Jiao Tong UniversityShanghai 200240China Shanghai Academy of Spaceflight Technology Shanghai 200235China Solarfun Power Holdings Solarfun Solar Shanghai Jiao Tong University R&D Center Shanghai 201109China Shanghai Shenzhou New Energy Source Development Co.Ltd Shanghai 20112China

The investigation of multi-crystalline silicon （mc-Si） surface etching technology is a key point in solar cell research. In this paper, mc-Si surface was etched in the common alkaline solution modified by an additive for 20 minutes at 78-80~C. Samples＇ surface morphology was observed by scanning electron microscope （SEM）. It is firstly found that the etched mc-Si surface has the uniform distribution of trap pits although the morphologies of trap pits are slightly different on different crystallographic planes. Si （100） plane was covered with many small Si-mountaln ranges or long V-shape channels arranged in a crisscross pat- tern. For （110） plane and （111） plane, they were full of a lot of triangle pit-traps （or quadrilateral holes） and twisted earthworm trap pits, respectively. The measured reflectance of the sample was 20.5% at wavelength range of 400--900 nm. These results illustrate that alkaline solution modified by an additive can effectively etch out trap pits with a good trapping light effect on mc-Si surfaces. This method should be very valuable for mc-Si solar cells.

关键词： mc-Si wafers chemical etching surface structure trapping effect reflectance

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development of large die fine pitch flip chip BGA using TCNCP technology

Development of large die fine pitch flip chip BGA using TCNC...

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Electronic Components and technology Conference (ECTC)

作者： Yanggyoo Jung Minjae Lee Sunwoo Park dongsu ryu Youshin Jung Chanha Hwang Choonheung Lee Sungsoon Park Miguel Jimarez Myung-June Lee Package Development Group R&D division Amkor Technology Korea Inc. Seoul Korea Amkor Technology Inc. Chandler AZ USA Altera Corporation San Jose CA USA

recently, technologies related to Fine Pitch Flip Chip or FPFC have been great achievements for various next generation devices, allowing a significant increase in the number of signal I/O and achieving low form factor packages. Consequently, fine pitch Cu pillar flip chip Chip Scale Package (CSP) with small sized die, with package dimension of less than 16×16mm, is already under high volume production using the Thermal-Compression Bonding with Non-conductive Paste (TCNCP) technology [1-2]. In the case of Flip Chip Ball Grid Array (FCBGA), there is a growing need for FPFC technology with Cu pillar in supporting next generation silicon node. However, there will be a high possibility of yield drop issue in conventional mass-reflow process and potential reliability due to the highly concerned tensile stress between low k die and substrate by CTE mismatch especially at the edge of the die. This can be a critical quality issue for fine pitch devices compared to normal pitch (i.e., 150um) flip chip BGA. Therefore, TCNCP bonding as an alternative should be studied on fine pitch Cu pillar flip chip BGA. This paper will discuss fine pitch flip chip assembly technology for large sized flip chip BGA. Two kinds of assembly method, mass reflow bonding versus thermal compression bonding, for the flip chip bonding will be compared for the large FPFCBGA package. Meanwhile, the advantage of TC bonding with pre-applied underfill process will be described. For robust interconnection between die and substrate for large FPFCBGA, the result of the bonding test will be described with several surface finishes such as ENEPIG, direct Immersion Gold (dIG), Immersion Tin (IT), and Solder Coating on substrate. Interestingly, one of selected surface finishes has shown excellent reliability test results. Finally, this paper will discuss an effective approach for fine pitch devices from an assembly perspective.

关键词： Flip chip Surface finishing Substrates Bonding reliability Tin

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