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In this study we investigated effects of 450 °C preanneal upon oxygen precipitation during subsequent low (700 °C)-medium (950 °C) temperature two-step furnace anneals in heavily B- and Sb-doped Czochralski Si wafers. Our optical microscopy and synchrotron radiation section topographic data ...
The 450°C isothermal section of the Fe-Al-Sb ternary phase diagram has been determined experimentally using scanning electron microscopy coupled with energy dispersive x-ray spectroscopy, and x-ray diffraction. No ternary compound is found in this system at 450°C. Experimental results indicate ...
Zn-Al-Co-Sb quaternary systemThe phase relations of the Zn-Al-Co-Sb quaternary system at 450 and 600?°C with Zn fixed at 93 at.% have been determined experimentally by means of scanning electron microscopy coupled with energy dispersive x-ray spectroscopy and x-ray diffraction. Four four-...
A Review of: "Annual Surveys: Si,Sb,Bi,Mn,Tc,Re, Heteronuclear complexes. R B King and J P Oliver (Eds) Elsevier Amsterdam, 1985, 577pp. ISBN 0-444-42512-2,US $ 166. 75/DFl 450.00" The use of heteronuclear filters enables the editing of complex1H nuclear magnetic resonance (NMR)...
AT25040N/NC/NB/ Shelf life of 12 months BOM PCB PCBA SMT 3D Printing CNC Mechatronic $1.01 - $19.63 Min. order: 1 pieceKey attributes Other attributes Model Number 218S4PASA12K SB450 Place of Origin Taiwan, China Brand Name other RoHS standard RoHS Compliant manufacturer Original factory Chi...
Antimony sulfide (Sb 2S 3) was successfully synthesized from antimony chloride (SbCl 3) and sodium thiosulfate (Na 2S 2O 3) in ethylene glycol (EG) containing different contents of cetyltrimethylammonium bromide (CTAB) as a template and splitting agent by the 600 W cyclic microwave radiation ...
解析 A 【详解】 句意:——我们学校的教师人数是多少?——是450。 考查特殊疑问句和代词。根据“the number of the teachers”可知,此处应该是提问数量是多少,应用what提问,而how many/much后要接名词,排除B/C选项;数量是一个整体,应用it代替,作主语,故选A。
MANUFACTURE OF ELECTRON SOURCE AND IMAGE FORMING D 优质文献 相似文献Electron-emitting device, electron source and image-forming apparatus using the device, and manufacture methods thereof US6171162 1999年10月6日 2001年1月9日 Canon Kabushiki Kaisha Electron-emitting device, electron source and image-fo...
Altogether 13 strains of virus were isolated during the 1974 influenza epidemic in Nigeria. These A/Nigeria/1/74 strains were shown by haemagglutination-inhibition tests to be closely related to the A/Port Chalmers/1/73 virus. Antibody to the epidemic strains developed rapidly in the population ...