Our samples were prepared by thermal oxidizing bismuth films. 热氧化不够或低速率蒸发形成薄膜富铋,出现无定型或其它相结构,光学吸收限变宽,移向低能处。
A process for acid lead free tin-bismuth alloy electrodeposition was advanced. 提出了一种酸性锡铋合金电沉积工艺。
Because of safety, the use of bismuth complexes has been exploring increasingly. 由于金属铋的绿色安全性,其配合物的应用领域不断扩大。
bismuth
[ noun ] a heavy brittle diamagnetic trivalent metallic element (resembles arsenic and antimony chemically); usually recovered as a by-product from ores of other metals <noun.substance>
Bismuth \Bis"muth\, n. [Ger. bismuth, wismuth: cf. F. bismuth.] (Chem.) One of the elements; a metal of a reddish white color, crystallizing in rhombohedrons. It is somewhat harder than lead, and rather brittle; masses show broad cleavage surfaces when broken across. It melts at 507[deg] Fahr., being easily fused in the flame of a candle. It is found in a native state, and as a constituent of some minerals. Specific gravity 9.8. Atomic weight 207.5. Symbol Bi.
Note: Chemically, bismuth (with arsenic and antimony is intermediate between the metals and nonmetals; it is used in thermo-electric piles, and as an alloy with lead and tin in the fusible alloy or metal. Bismuth is the most diamagnetic substance known.
{Bismuth glance}, bismuth sulphide; bismuthinite.
{Bismuth ocher}, a native bismuth oxide; bismite.
About a year ago, however, German and Japanese researchers discovered that at a temperature of around 20 degrees Kelvin, or minus 423 degrees Fahrenheit, the weak-link problem largely disappears in new superconductors containing the element bismuth.
By coincidence, on the same day the Arkansas report appeared, word came of a Japanese team's discovery of a superconductor containing bismuth, a cousin of thallium.
Maeda started with copper oxide _ or copper and oxygen, the common denominators in nearly all the new superconductors _ and added bismuth, strontium and calcium.
The new alloy mixes bismuth and dashes of tin or phosphorous with copper to obtain the same ductility and machinability in copper alloys containing lead, said John Plewes who, with Dominic Loiacono, developed the new alloy.
The mixture of potassium, barium, bismuth and oxygen became superconducting at about 406 degrees below zero, according to its discoverers at AT&T's Bell Laboratories.