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 silicon ['silikәn]   添加此单词到默认生词本
n. 硅

[化] 硅Si

[医] 硅(14号元素,旧名矽)




    silicon
    [ noun ]
    a tetravalent nonmetallic element; next to oxygen it is the most abundant element in the earth's crust; occurs in clay and feldspar and granite and quartz and sand; used as a semiconductor in transistors
    <noun.substance>


    Silicon \Sil"i*con\, n. [See {Silica}.] (Chem.)
    A nonmetalic element analogous to carbon. It always occurs
    combined in nature, and is artificially obtained in the free
    state, usually as a dark brown amorphous powder, or as a dark
    crystalline substance with a meetallic luster. Its oxide is
    silica, or common quartz, and in this form, or as silicates,
    it is, next to oxygen, the most abundant element of the
    earth's crust. Silicon is characteristically the element of
    the mineral kingdom, as carbon is of the organic world.
    Symbol Si. Atomic weight 28. Called also {silicium}.

    1. But it requires wholesale replacement of lecturers and classrooms with silicon chips and glass threads.
    2. Many expect that computer makers eventually will switch to gallium arsenide, a semiconductor inherently faster than silicon, but also much more difficult to work with.
    3. One payoff might be chiplike integrated circuits in which electrically encoded information is translated by porous silicon into light-encoded data, which could be sent at high speed between different computers or components within the same computer.
    4. The latest advance may help overcome this problem by paving the way for "optoelectronics" based on cheap silicon.
    5. The process produces a hard crystalline mass, silicon carbide, which features very strong molecular bonds and a close-knit structure, much like a diamond.
    6. The silicon film doesn't etch uniformly, so it is riddled with tiny pores and channels.
    7. A team of 20 scientists, sent recently by the government's National Science Commission, found that the air contained potentially toxic levels of particles including silicon, iron, calcium and aluminum.
    8. Gallium arsenide, three times faster than silicon but difficult to work with, is used for some of the chips.
    9. Storing information permanently on silicon would eliminate the moving parts and their accompanying drawbacks.
    10. As a consequence of this transaction, GK will be a leading global producer of silicon metal servicing high growth applications in the silicone and electronics industries.
    11. Leave Graphisoft's silicon villa and you return to a different world.
    12. The company's first product is known as GA22V10, a gallium-arsenide version of a common silicon chip called the 22V10, which is made by a number of producers, including Advanced Micro Devices Inc.
    13. Next year Western Digital plans to consolidate its operations from 11 buildings in Irvine into two buildings in the same citya new headquarters and, a block away, a modern $100 million silicon wafer fabrication plant.
    14. Now Japanese scientists report in the journal Nature that they've got a composite of silicon nitride and silicon carbon crystals; at 1,600 degrees, a tiny piece was pulled to 150% of its original length without any deformations.
    15. Now Japanese scientists report in the journal Nature that they've got a composite of silicon nitride and silicon carbon crystals; at 1,600 degrees, a tiny piece was pulled to 150% of its original length without any deformations.
    16. The new solar cell, which is composed of 17,000 tiny solar spheres on a thin aluminum foil, uses low-purity silicon to convert sunlight to electricity.
    17. The profusion of ever more complex fixed-income instruments is forcing Wall Street investment banks to add high-powered silicon to their arsenals.
    18. This is because computer models of silicon chips suggest the leakage current goes down into the silicon before affecting other transistors.
    19. This is because computer models of silicon chips suggest the leakage current goes down into the silicon before affecting other transistors.
    20. As computer chips become more complex and more circuits are packed onto the silicon wafers, the traditional method of making them _ using photolithography techniques with visible light to etch the electronic circuits _ is no longer practical, Phelps said.
    21. Todd Morgenthaler, Nara's president, told Mr. Doerr that he had figured out a way to produce on a single piece of silicon the main circuitry of IBM's PC AT, then its flagship personal computer.
    22. A silicon chip containing a unique number is embedded in the product.
    23. A photographic process etches a pattern on a silicon wafer, which is then washed in chemicals, leaving the desired crank, spring or gear shape intact.
    24. These electrons then flow back and forth from one silicon layer to the other, creating an electric field whose current can be tapped.
    25. The Moses Lake plant, the larger of the two plants employing 220 workers, makes polysilicon, a material used in the manufacture of silicon wafers for computer chips and other electronics.
    26. But now experiments like Mr. Heiblum's indicate it may be possible to raise the velocity of electrons another fivefold, making gallium arsenide 25 times faster than silicon.
    27. Researchers at Sandia National Laboratories stacked a gallium arsenide solar cell made by Varian Associates Inc. of Palo Alto, Calif., on a silicon cell from Stanford University to achieve a 31 percent efficiency rating.
    28. He says these silicon polymers, if developed commercially in the future, "are likely to be competitive with or superior to some carbon-based materials currently used." Silicon polymers aren't entirely new.
    29. Home Shopping has unsettled many investors and industries mainly because no one knows whether video retailing is a fad, like the hula hoop, or the beginning of a new industry, as the silicon chip proved to be.
    30. Over the past decade, Soviet military thinkers charged with worrying about the West have focused their attention on one substance being added to the imperialist arsenal: silicon.
    silicon
    silicon (Si)
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