| 单词 | silicon dioxide |
| 例句 | It involves mining silicon dioxide for the manufacture of microprocessors that will be combined with a deadly Martian pathogen called M. thanatobacillus to create "a new cybernetic life-form." 'The Four Fingers of Death': Rick Moody's sendup of sci-fi, horror movies, duct tape and the decline of the U.S. 2010-07-29T20:20:00Z If you take a close look at a handful of sand you will find that many of these bits of stone are made of quartz, a crystal form of silicon dioxide. Mark Miodownik: an obsession with materials 2013-05-24T15:53:00Z For this, the team used individual silicon dioxide particles, known as silica, and grafted chain-like polymer molecules as a sort of shell. Crystallization as the driving force 2023-09-25T04:00:00Z Write an equation for the reaction of solid silicon dioxide with hydrofluoric acid to yield gaseous silicon tetrafluoride and liquid water. Chemistry 2019-02-14T00:00:00Z Bayer’s Campho-Phenique Pain & Itch Relief still contains camphor and phenol along with inactive ingredients: colloidal silicon dioxide, eucalyptus oil, glycerin and light mineral oil. Mysterious white spots from Campho-Phenique 2020-07-02T04:00:00Z For example, silicon dioxide is added to salts, spices and icing sugar to improve their flow. 'I wash all my food like crazy': researchers voice concern about nanoparticles 2019-05-29T04:00:00Z Utsunomiya thinks that happened when the containment vessels finally failed and dropped down onto the reactor’s concrete pedestal: Some of the silica in the concrete vaporized into silicon dioxide, which condensed around the particles. Radioactive Glass Beads May Tell the Terrible Tale of How the Fukushima Meltdown Unfolded 2019-03-11T04:00:00Z An intermediate type of magma, at about 55 to 65 percent silicon dioxide, ranges from 1,472 to 1,832 degrees Fahrenheit. How Hot Can Lava Get? 2018-05-18T04:00:00Z Silica gel, a colloidal dispersion of hydrated silicon dioxide, is formed when dilute hydrochloric acid is added to a dilute solution of sodium silicate. Chemistry 2019-02-14T00:00:00Z Colloidal silicon dioxide is frequently included in sunscreen as an inactive ingredient. Mysterious white spots from Campho-Phenique 2020-07-02T04:00:00Z Moganite, a crystal of silicon dioxide similar to quartz, is known to form on Earth in specific circumstances in sedimentary settings from alkaline fluids. Mineral Found in Lunar Meteorite Hints at Hidden Moon Water 2018-05-03T04:00:00Z Wu and his colleagues at National Taiwan University created a silicon dioxide mold that resembles a moth’s eye surface and used it to produce a hard, dimpled coating on a flexible sheet. Learning from Nature: Moth Eyes Inspire Nonreflective Screen Coating 2017-07-26T04:00:00Z To create their photonic crystals, the researchers started with millimeter thick sheets of glass and deposited 90 alternating layers of tantalum oxide and silicon dioxide. How to get that old-fashioned lightbulb glow without wasting so much energy 2016-01-11T05:00:00Z The contrast in structure and physical properties between silicon dioxide and carbon dioxide is interesting, as illustrated in Figure 18.18. Chemistry 2019-02-14T00:00:00Z But David Stevenson, a geophysicist at the California Institute of Technology in Pasadena, says that magnesium oxide — not silicon dioxide — is the key to solving the problem. Magnetic mystery of Earth's early core explained 2015-12-16T05:00:00Z The material belongs to a category known as oxide glasses, which mainly consist of silicon dioxide - but with their strength boosted by alumina. Scientists develop ultra-hard glass - BBC News 2015-11-03T05:00:00Z They also grew successive layers separated by sheets of silicon dioxide, which they say opens up the possibility of making tiny, high-density 3D circuits in which components stack up vertically. Batches of ultra-thin transistors made from 2D materials 2015-04-28T04:00:00Z They will probably need to replace the silver, too—though the cost of silicon dioxide, also known as sand, is not so much of a problem. A cool idea 2014-11-27T05:00:00Z In silicon dioxide, each silicon atom links to four oxygen atoms by single bonds directed toward the corners of a regular tetrahedron, and SiO4 tetrahedra share oxygen atoms. Chemistry 2019-02-14T00:00:00Z He found that silicon and oxygen crystallized out together, as silicon dioxide, whenever both were present. Magnetic mystery of Earth's early core explained 2015-12-16T05:00:00Z Among the findings of his effort, he says, were that certain particles, including titanium dioxide and silicon dioxide, may harm the ozone layer as much as 100 times less than sulfates. What have climate engineering boffins learned? 2014-11-25T05:00:00Z The main ingredient, silicon dioxide or silica, is everywhere. The next silicon revolution? 2014-08-01T04:00:00Z It consists of four layers of silicon dioxide interspersed with three of hafnium dioxide. A cool idea 2014-11-27T05:00:00Z It is possible to produce silicon by the high-temperature reduction of silicon dioxide with strong reducing agents, such as carbon and magnesium: Chemistry 2019-02-14T00:00:00Z When silicon dioxide precipitated in the early Earth, it would have made the remaining melt buoyant enough to continue rising, thus setting up the churning motion needed to sustain the dynamo, Hirose reported. Magnetic mystery of Earth's early core explained 2015-12-16T05:00:00Z The heat then flows into a photonic crystal, which is composed of layers of silicon and silicon dioxide. New Hybrid Solar Device Exploits the Best of Both Worlds 2014-04-08T12:00:00Z Sand grains — usually made of silicon dioxide, the main constituent of glass — withstand Mariana-class pressures. What Lives at the Bottom of the Mariana Trench? More Than You Might Think 2013-04-15T00:15:05.547Z Researchers fashioned different devices in which the width of the silicon dioxide ranged from 120 to 400 nanometers, as they report in a paper in press at Physical Review Letters. Nanoscale Device Makes Light Travel Infinitely Fast 2012-11-06T22:38:49Z Silicon tetrachloride can be prepared by direct chlorination at elevated temperatures or by heating silicon dioxide with chlorine and carbon: Chemistry 2019-02-14T00:00:00Z Stevenson, in contrast, plumps for magnesium, saying it “makes much more sense” than silicon dioxide because magnesium oxide would precipitate out of a molten Earth first. Magnetic mystery of Earth's early core explained 2015-12-16T05:00:00Z A basalt, which is also common under the ocean on Earth, typically has 48% silicon dioxide and percent amounts of iron, calcium and magnesium, and sodium and potassium oxides as well. Mars rover prepares to zap rocks 2012-08-18T01:07:44Z The shells of deceased diatoms and some radiolarian skeletons are also made of silicon dioxide. What Lives at the Bottom of the Mariana Trench? More Than You Might Think 2013-04-15T00:15:05.547Z The resonant electromagnetic field is concentrated at the 5-nm-thick silicon dioxide gap layer sandwiched by the semiconductor nanorod and the atomically smooth silver film. Laser Diode Creates World's Smallest Semiconductor Laser For Optical Computing 2012-07-30T19:16:05Z It is possible to prepare silicon tetrafluoride by the reaction of silicon dioxide with hydrofluoric acid: Chemistry 2019-02-14T00:00:00Z Top of their list is silicon dioxide, the ubiquitous insulator used in silicon chips. Production: Beyond sticky tape 2012-03-14T22:50:43.050Z As gate lengths shrink smaller than 14 nanometers, the silicon dioxide insulator used in conventional transistors fails to perform properly and is said to "leak" electrical charge. New 3D Transistors May Lead to Lighter Laptops 2011-12-28T15:37:00Z Mercuric oxide, sulphide and iodide; arsenic trioxide; titanium dioxide and silicon dioxide may be cited as examples. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" With his Sco drill he might have pierced that silicon dioxide armor till he reached the creature's gritty flesh. The Planetoid of Peril Hydrofluoric acid is the only common acid that will react with silicon dioxide or silicates. Chemistry 2019-02-14T00:00:00Z We're carbon, and our waste is carbon dioxide, and this thing is silicon, and its waste is silicon dioxide—silica. A Martian Odyssey One potential solution to this leaking problem is to replace silicon dioxide with materials that have a higher insulating value, or "dielectric constant," such as hafnium dioxide or aluminum oxide. New 3D Transistors May Lead to Lighter Laptops 2011-12-28T15:37:00Z Other varieties of silicon dioxide, some of which also contain water, are chalcedony, onyx, jasper, opal, agate, and flint. An Elementary Study of Chemistry When heated to redness in the air it becomes converted into silicon dioxide and free selenium. Scientific American Supplement, No. 841, February 13, 1892 The usual crystalline form of silicon dioxide is quartz, a hard, brittle, clear, colorless solid. Chemistry 2019-02-14T00:00:00Z A quartz crystal is a macromolecule of silicon dioxide. Chemistry 2019-02-14T00:00:00Z It is made by heating coke and sand, which is a form of silicon dioxide, in an electric furnace, the process being extensively carried on at Niagara Falls. An Elementary Study of Chemistry As obtained by chemical processes silicon dioxide is an amorphous white powder. An Elementary Study of Chemistry A certain amount of silicon dioxide is also present. An Elementary Study of Chemistry In contrast, silicon dioxide is a covalent network solid. Chemistry 2019-02-14T00:00:00Z When sodium and calcium silicates, together with silicon dioxide, are heated to a very high temperature, the mixture slowly fuses to a transparent liquid, which on cooling passes into the solid called glass. An Elementary Study of Chemistry |
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