| 单词 | tungstate |
| 例句 | First, they mix a solution of ammonium tungstate with a polymer to create a suspension of plastic droplets, each of which contains ammonium tungstate. Tiny balls of fire 2014-06-26T04:00:00Z Tungsten, tung′sten, n. a rare metal, chiefly derived from wolfram, which is a tungstate of iron and manganese, and likewise found in scheelite, which is a tungstate of lime.—n. Chambers's Twentieth Century Dictionary (part 4 of 4: S-Z and supplements) 2012-01-30T03:00:19.113Z An india-rubber substitute is obtained by adding sodium tungstate and hydrochloric acid to a strong glue solution; this preparation may be rolled out when heated to 60�. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 2 "Gloss" to "Gordon, Charles George" 2011-10-31T02:00:28.703Z It’s found in wolframite, and hubnerite and so on; but this is calcium tungstate, where it is found in connection with lime. Shadow Mountain Steep common wicks in a concentrated aqueous solution of tungstate of soda, and then dry thoroughly in an oven. The Ladies Book of Useful Information Compiled from many sources When this state is attained the Roentgen effect as tested by a screen of calcium tungstate should be very brilliant. On Laboratory Arts Unaffected by foul air, the tungstate appears to possess the common fault of all whites when compared with white lead—want of body, moreover it is a bad dryer. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists The tungstate of ammonia requires simple evaporation on the water-bath and gentle ignition in order to cause the tungstic acid to be left in an almost pure state; possibly, it may carry a little silica. A Text-book of Assaying: For the Use of Those Connected with Mines. The substance which he employed was the tungstate of calcium. Notable Events of the Nineteenth Century Great Deeds of Men and Nations and the Progress of the World A patented material of this description is due to Zingler, who boils the canvas or similar woven fabric under pressure in a solution of tungstate of soda for three hours. Scientific American Supplement, No. 598, June 18, 1887 Commercial sodium tungstate is fused with dried calcium chloride in the proportion of three parts of the former to two parts of the latter, both constituents being in fine powder and well mixed together. On Laboratory Arts With us, at least, tungstate of baryta is far from having the body of white lead, and indeed is inferior in opacity to good zinc white. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists The tungstic acid is dissolved, and separated as ammonic tungstate, and, after evaporation, is gently ignited, the heat being increased towards the end. A Text-book of Assaying: For the Use of Those Connected with Mines. When the X-ray came up, I made the first fluoroscope, using tungstate of calcium. Edison, His Life and Inventions This chemical is a salt, made by roasting wolfram with soda ash, and wolfram is a native tungstate of iron and manganese. Joe Strong the Boy Fire-Eater The Most Dangerous Performance on Record The preparation of calcium tungstate for fluorescent screens is very simple. On Laboratory Arts Also many lodes contain hard heavy ferric ores, such as titanic iron, tungstate of iron, and hematite, in which gold is held. Getting Gold: a practical treatise for prospectors, miners and students A solution of tungstate acidulated with hydrochloric acid becomes intensely blue on the addition of stannous chloride and warming. A Text-book of Assaying: For the Use of Those Connected with Mines. On the inside of this is spread a layer of tungstate of calcium. Edison, His Life and Inventions It has them, too, to a certain extent, but by experimenting Joe had found the tungstate of soda best. Joe Strong the Boy Fire-Eater The Most Dangerous Performance on Record Your statement regarding the action of the oxides of gold, in combination with the tungstate of bdellium, has more than in practice verified itself. The Brick Moon and Other Stories As Ham Logan had guessed, the young fire-eater was mixing up a solution of tungstate of soda. Joe Strong the Boy Fire-Eater The Most Dangerous Performance on Record Cover with dilute ammonia, and filter the solution, which contains ammonic tungstate, into an evaporating dish. A Text-book of Assaying: For the Use of Those Connected with Mines. Do not try to fire-proof the mouth with tungstate of soda. Joe Strong the Boy Fire-Eater The Most Dangerous Performance on Record |
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