| 单词 | cerium |
| 例句 | This alignment would otherwise require a powerful magnetic field to activate, since cerium fluoride is naturally paramagnetic with randomly oriented spins even at zero temperature. Atomic dance gives rise to a magnet 2023-11-09T05:00:00Z Inside this reactor, which contains a porous ceramic structure made of cerium oxide, a thermochemical cycle takes place for splitting water and CO2 captured previously from the air. 3D printed reactor core makes solar fuel production more efficient 2023-10-27T04:00:00Z For the study, the researchers demonstrated the reaction in a lab employing a frequently used cobalt catalyst, conditioned by adding cerium oxide, and then modeled how it worked. Discovery made about Fischer Tropsch process could help improve fuel production 2023-10-05T04:00:00Z These are typically rich in cerium, used in flat screens, and lanthanides, such as praseodymium and neodymium, which go into magnets. Inside Vietnam's plans to dent China's rare earths dominance 2023-09-25T04:00:00Z The 17 elements are: lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, scandium, yttrium. Explainer-China's rare earths dominance in focus after mineral export curbs 2023-07-05T04:00:00Z Among the products of Meitner, Hahn, and Strassman’s fission reaction were barium, krypton, lanthanum, and cerium, all of which have nuclei that are more stable than uranium-235. Chemistry 2019-02-14T00:00:00Z Tanbreez says half the rare earth metals it mines would be lanthanum and cerium - relatively plentiful metals used in telescope lenses and auto catalysts to cut emissions. Mining magnets: Arctic island finds green power can be a curse 2021-03-02T05:00:00Z Soon, moving along the rows of the periodic table like a beachcomber on a shore, Cade began to experiment with salts of rubidium, cerium and strontium. Lithium: the gripping history of a psychiatric success story 2019-08-25T04:00:00Z The glassmaking industry largely abandoned using the rare earth element cerium for polishing. Don't Panic About Rare Earth Elements 2019-05-31T04:00:00Z They include elements like gadolinium, lanthanum, cerium and promethium, and are vital in the production of cancer treatment drugs, smartphones and renewable energy technologies. US-China trade: what are rare-earth metals, and what's the dispute? 2019-05-29T04:00:00Z Reviewing these data indicates a general trend of increasing solubility with temperature, although there are exceptions, as illustrated by the ionic compound cerium sulfate. Chemistry 2019-02-14T00:00:00Z Rare earth metals are a group of 17 elements - lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, scandium, yttrium - that appear in low concentrations in the ground. Explainer: China's rare earth supplies could be vital bargaining... 2019-05-22T04:00:00Z He identified and stole iron–cerium rods found in the laboratory. In his element: looking back on Primo Levi’s The Periodic Table 2019-01-27T05:00:00Z Planavsky and his team tested rocks for concentrations of the element cerium, which serves as a proxy for ancient oxygen levels. The Search for ET May Be Missing Life on Low-Oxygen Worlds 2018-09-10T04:00:00Z Next door to the oven, more than 150 bags of neodymium and praseodymium and cerium sat on a warehouse floor to be shipped to customers around the world. How Rare Earths (What?) Could Be Crucial in a U.S.-China Trade War 2018-07-11T04:00:00Z The rare earth element of cerium, for example, is the 25th most abundant on Earth, making it about as common as copper. China can’t control the market in rare earth elements because they aren’t all that rare 2018-04-17T04:00:00Z Scientists at Gran Sasso needed the cerium for a search—now called off—for hypothetical particles called sterile neutrinos. Mishandling of spent nuclear fuel in Russia may have caused radioactivity to spread across Europe 2018-02-14T05:00:00Z Plus, additional testing showed the presence of rare earth elements such as cerium and strontium sulfide. Does that evidence truly tie D.B. Cooper to Boeing? Plot thickens 2017-01-20T05:00:00Z The measured cerium levels correspond to oxygen concentrations of about 0.1 percent of present atmospheric levels, the team reported. The Search for ET May Be Missing Life on Low-Oxygen Worlds 2018-09-10T04:00:00Z The screen was polished with lanthanum and cerium. How Rare Earths (What?) Could Be Crucial in a U.S.-China Trade War 2018-07-11T04:00:00Z Compact fluorescent lamps use europium and terbium, for example, and catalytic convertors rely on cerium. Seven chemical separations to change the world 2016-04-25T04:00:00Z It also plans to court more Japanese customers, specifically for its lanthanum and cerium products, used in petroleum refining and catalytic converters respectively. Lynas CEO Digs In as Rare-Earth Prices Slump 2015-09-01T04:00:00Z The chemical element cerium, discovered in 1803, was named after the celestial Ceres. Ceres Is Now in the Spotlight 2015-03-06T05:00:00Z Your smartphone or tablet may appear all gloss and sheen — a marvel of the modern world — but inside it’s filled with ancient and sometimes rare earth metals like neodymium, europium and cerium. SungardASVoice: Are We Running Out Of Metals For Our High-Tech Gadgets? 2014-05-19T04:00:00Z For example, the researchers used the nanotubes to carry nanosize particles of ceria, a compound composed of the rare earth metal cerium and oxygen, into the chloroplasts. Bionic Plants Offer Superpowered Photosynthesis 2014-03-16T18:01:00Z Heavy rare earths are scarcer than cerium and other light rare earths, making them much more valuable. Russia to invest $1 billion in rare earths to cut dependence on China 2013-09-10T09:36:13Z There are 17 rare earths in total, such as lanthanum and cerium. Lynas shares rise on Malaysian poll 2013-05-06T02:46:48Z There are 17 rare earths in total, such as lanthanum and cerium, and their production is currently dominated by China. Rare earths plant gets go ahead 2012-11-08T10:37:34Z They mixed zinc oxide and cerium oxide nanoparticles into separate batches of soil from an organic farm in California. Metal Nanoparticles Hurt Soybean Growth 2012-08-21T20:39:10Z The cerium was able to enter the plants' roots. Nanoparticle 'risk' to food crops 2012-08-21T09:36:54Z Not to mention rare elements such as lanthanum, cerium, and neodymium, essential to modern technology and commanding highest prices. Afghanistan’s Risky Mining Bonanza 2012-07-04T08:45:00Z A silicate containing a large amount of cerium. Webster's Unabridged Dictionary 2012-03-24T02:00:23.513Z Within that so-called waste stream, one can find significant amounts of cerium, samarium, gadolinium and europium, all rare-earth elements listed in the article. Readers Respond to "Toxins All Around Us" and Other Articles 2012-01-27T17:45:04.630Z Gadolinite, gad′ō-lin-īt, n. a silicate of the yttrium and cerium metals, containing also beryllium and iron. Chambers's Twentieth Century Dictionary (part 2 of 4: E-M) 2012-01-11T03:00:23.770Z The researchers focussed on the effects of zinc oxide and cerium oxide nanoparticles. Nanoparticle 'risk' to food crops 2012-08-21T09:36:54Z So far, geologists say, they have mapped one million metric tons of these critical elements, which include lanthanum, cerium and neodymium. Afghanistan Holds Enormous Bounty of Rare Earths, Minerals 2011-09-29T17:45:05.640Z Prices for cerium and lanthanum, the most abundant rare- earth elements, will drop by 50 percent in 12 months, Christopher Ecclestone, an analyst at Hallgarten & Co. in New York, has forecast. Rare Earths Fall as Toyota Develops Alternatives: Commodities 2011-09-29T02:26:16Z The category covers 17 chemically similar metals include lanthanum, cerium and neodymium. China Increases Rare-Earth Export Quota; EU Criticizes Move 2011-07-15T06:00:39Z These 17 chemically similar metals include lanthanum, cerium and neodymium, and are used in products including Boeing Co. helicopter blades, Raytheon Co. missiles, Toyota Motor Corp. hybrid cars and wind turbines. China Almost Doubles Rare-Earth Export Quota; EU Criticizes Move 2011-07-14T17:05:56Z Soybean growth was significantly stunted when the plants were cultivated in the presence of high levels of cerium oxide nanoparticles. Nanoparticle 'risk' to food crops 2012-08-21T09:36:54Z Australian miner Lynas said it plans to get a pre-operation licence by September for production of four light rare earths: neodymium, cerium, praseodymium and lanthanum. Sumitomo says to close Molycorp deal once customers secured 2011-06-17T12:29:44Z China’s Inner Mongolia Baotou region produces so-called light rare earths such as lanthanum, cerium and samarium. Rare Earth Prices Double on China, Industrial Minerals Says 2011-06-17T06:05:38Z China’s Inner Mongolia Baotou region produces so- called light rare earths such as lanthanum, cerium and samarium. Rare Earth Prices Double on China, Industrial Minerals Says 2011-06-17T03:41:30Z Calcium, cerium, lithium, magnesium, potassium, sodium, and strontium are obtained by the electrolysis of fused chlorides, sodium being also obtained from fused hydroxide and fused nitrate. The New Gresham Encyclopedia Volume 4, Part 2: Ebert to Estremadura 2011-04-14T02:00:56.200Z The cerium nanoparticles seemed to completely inhibit the bacteria's ability to fix nitrogen. Nanoparticle 'risk' to food crops 2012-08-21T09:36:54Z That spurred Japanese consumers to scramble to cut their cerium consumption. Sumitomo says to close Molycorp deal once customers secured 2011-06-17T12:29:44Z In addition to rare earths like cerium for abrasives and dysprosium for magnets, Japan is also looking to cut down on its use of cobalt and tungsten. Japan seeks to cut rare earth usage by a third 2011-02-25T06:57:56Z And because Japan dominates some of the technological processes that use rare earths—such as polishing hard-drive platters with cerium oxide—interrupted access would be felt worldwide. Japan responds to China: Rare action 2011-01-20T10:43:36Z Rare earths are 17 chemically similar elements including neodymium, cerium and lanthanum that are used in the production of electronics. China Cuts Export Quotas for Rare Earths 11% in First Round 2010-12-28T15:40:02Z The presence in the mixture of a metallic salt is very important in aiding the development of the black, and for this purpose salts of vanadium, cerium and copper have proved to be specially useful. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 8 "Dubner" to "Dyeing" 2010-12-26T03:00:17.840Z The prototype, which was devised by researchers in the US and Switzerland, uses a quartz window and cavity to concentrate sunlight into a cylinder lined with cerium oxide, also known as ceria. New solar fuel machine unveiled 2010-12-23T19:11:28Z In early July, cerium oxide, used in the manufacture of ceramics and photosensitive glass, was $6-7 a kilo, she said. Chinese moves to limit mineral supplies sparks struggle over rare earths 2010-10-25T20:00:00Z It would also resume bulk production of lower-value rare-earth elements like cerium, used in industrial processes like polishing glass and water filtration. Challenging China in Rare Earth Mining 2010-04-21T16:34:00Z Cerium dioxide, CeO2, is produced when cerium carbonate, nitrate, sulphate or oxalate is heated in air. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 7 "Cerargyrite" to "Charing Cross" It tarnishes more easily and inflames less easily than cerium. The Galaxy, Volume 23, No. 2, February, 1877 The mantle is made by dipping a cylinder of cotton net into a solution of nitrate of thorium and cerium, containing 99 per cent. of the former and 1 per cent. of the latter metal. How it Works Dealing in simple language with steam, electricity, light, heat, sound, hydraulics, optics, etc., and with their applications to apparatus in common use And there are other metals, such as cerium, which, giving a still more complex spectrum, would doubtless be still more numerously resolved. A Popular History of Astronomy During the Nineteenth Century Fourth Edition These are platinum, gold, tungsten, mercury, lead, palladium, silver, bismuth, uranium, vanadium, copper, cadmium, cobalt, arsenic, nickel, iron, molybdenum, tin, zinc, antimony, tellurium, manganese, tatiaum, chromium, columbium, rhodium, iridium, osmium, cerium. The Mines and its Wonders Nitrates of cerium have been described, as have also phosphates, carbonates and a carbide. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 7 "Cerargyrite" to "Charing Cross" The mineral monazite is the source of the thorium and cerium compounds which, glowing intensely when heated, form the light-giving material of incandescent gas mantles. The Economic Aspect of Geology A purified cotton fabric—or yarn—is treated with a concentrated solution of the mixed nitrates of thorium and cerium, and, after drying, the cellulose is burned away. Researches on Cellulose 1895-1900 It was a dilute solution of cerium nitrate. Question of Comfort Thus C stands for carbon, Cl for chlorine, Cd for cadmium, Ce for cerium, Cb for columbium. An Elementary Study of Chemistry Klaproth in 1803, whilst J. Berzelius at about the same time also examined it and came to the conclusion that it was the oxide of a new metal, which he termed cerium. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 7 "Cerargyrite" to "Charing Cross" Monazite is a mineral consisting of phosphates of cerium, lanthanum, thorium, and other rare earths in varying proportions. The Economic Aspect of Geology De Mare in 1894, and Knofler in 1895, patented methods of preparing such cellulose threads containing the salts of thorium and cerium, by spinning a collodion containing the latter in solution. Researches on Cellulose 1895-1900 Of the medicines prescribed for "morning sickness" and the nausea of pregnancy, cerium oxalate taken three times a day in doses of five grains each, is probably one of the best. The Mother and Her Child These mantles contain the oxides of cerium and thorium in the ratio of about 1% of the former to 99% of the latter. An Elementary Study of Chemistry In the ordinary course cerium is thrown down along with alumina and the other earths by ammonia. A Text-book of Assaying: For the Use of Those Connected with Mines. Mantles are made by knitting cylinders of cotton or of other fiber and soaking these in a solution of the nitrates of cerium and thorium. Artificial Light Its Influence upon Civilization When the condition is annoying the following powder will give much relief: powder Ingluvin, oxalate of cerium, of each five grains. Mother's Remedies Over One Thousand Tried and Tested Remedies from Mothers of the United States and Canada Since the monazite contains more cerium than thorium and the mantles made from it contain more thorium than cerium, there is a superfluity of cerium. Creative Chemistry Descriptive of Recent Achievements in the Chemical Industries When certain substances, such as thorium and cerium, are heated, they do not melt or vaporize, but glow with an intense bright light. General Science On treating with oxalic acid, cerium, lanthanum, and didymium are precipitated as oxalates, which on ignition are converted into oxides. A Text-book of Assaying: For the Use of Those Connected with Mines. Later he greatly improved the mantles by purifying the oxides and finally achieved his great triumph by adding a slight amount of ceria, an oxide of cerium. Artificial Light Its Influence upon Civilization Both, when hot and cold, the bead is colorless, by which character oxide of cerium may be distinguished from oxide of iron. A System of Instruction in the Practical Use of the Blowpipe Being A Graduated Course Of Analysis For The Use Of Students And All Those Engaged In The Examination Of Metallic Combinations An alloy of cerium with 30 or 35 per cent. of iron proved the best and was put on the market in the form of automatic lighters. Creative Chemistry Descriptive of Recent Achievements in the Chemical Industries How much thorium, not to speak of cerium, could they take at a maximum. Tono Bungay The separation of lanthanum and didymium in the solution from which the cerium has been precipitated is effected by precipitating them together as oxalates, igniting, and dissolving in dilute nitric acid. A Text-book of Assaying: For the Use of Those Connected with Mines. It occurs in certain rare minerals, as cerite, gadolinite, orthite, etc., and was so named from the difficulty of separating it from cerium, didymium, and other rare elements with which it is usually associated. The Gutenberg Webster's Unabridged Dictionary Section I, J, K, and L On boiling, the cerium is precipitated as dioxide, which is filtered off, ignited, and weighed. A Text-book of Assaying: For the Use of Those Connected with Mines. During the war the cerium sparklers were much used in the trenches for lighting cigarettes, but—as those who have seen "The Better 'Ole" will know—they sometimes fail to strike fire. Creative Chemistry Descriptive of Recent Achievements in the Chemical Industries The chief sources of the material for the Welsbach burners is monazite, a glittering yellow sand composed of phosphate of cerium with some 5 per cent. of thorium. Creative Chemistry Descriptive of Recent Achievements in the Chemical Industries Compounds of cerium with volatile acids yield dioxide on ignition; and this, on solution in hydrochloric acid, yields cerous chloride and chlorine. A Text-book of Assaying: For the Use of Those Connected with Mines. The manufacturers give away a pound of cerium salts with every purchase of a hundred pounds of thorium salts. Creative Chemistry Descriptive of Recent Achievements in the Chemical Industries It annoyed Welsbach to see the cerium residues thrown away and accumulating around his mantle factory, so he set out to find some use for it. Creative Chemistry Descriptive of Recent Achievements in the Chemical Industries |
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