金屬疑問..

Lazy_From_Hell

想請問大家對於 " 鈷 ( COBALT)"跟 " 鈦 ( Titanium )"這兩個元素的認知度~

kensai

原帖由 Lazy_From_Hell 于 28-8-2006 09:56 PM 发表
想請問大家對於 " 鈷 ( COBALT)"跟 " 鈦 ( Titanium )"這兩個元素的認知度~

你要知道什么？
这两个都是 transition metals
cobalt 最出名的都是大用来做vitamin B
然后有 cobalt chloride ，用来辨认水分
蓝色-〉粉红色，原因是h20变成了cobalt的 ligands


titanium/白金
虽然他的abundance是很大（好像是金属前十名）
但是由于tio2 很难被extract,只有electrolysis 的方法,所以很贵
然后用处是做飞机，，装饰品

他没有其他transition metal ,只有一种颜色
因为3d orbitals 没有多余位置给ligands

我只记得那么多罢了

Lazy_From_Hell

原帖由 kensai 于 28-8-2006 11:56 PM 发表


你要知道什么？
这两个都是 transition metals
cobalt 最出名的都是大用来做vitamin B
然后有 cobalt chloride ，用来辨认水分
蓝色-〉粉红色，原因是h20变成了cobalt的 ligands


titanium/白金
虽然 ...

感謝您的回覆~
但是對於 COBALT有更詳細的資料嗎?
謝謝~

jernie

原帖由 Lazy_From_Hell 于 31-8-2006 03:21 AM 发表


感謝您的回覆~
但是對於 COBALT有更詳細的資料嗎?
謝謝~

http://zh.wikipedia.org/wiki/%E9%92%B4
希 望 能 帮 到 你 ~~

Lazy_From_Hell

原帖由 jernie 于 31-8-2006 01:29 PM 发表


http://zh.wikipedia.org/wiki/%E9%92%B4
希 望 能 帮 到 你 ~~

謝謝~暫時來說只有這個了~
我都找不到其他的解釋...

Infinite81

原帖由 kensai 于 28-8-2006 11:56 PM 发表


titanium/白金

真确来说 titanium 是 钛
白金是 platinum

kensai

原帖由 Infinite81 于 3-9-2006 11:16 PM 发表


真确来说 titanium 是 钛
白金是 platinum

谢谢
我华语很差的，paiseh~

Lazy_From_Hell

titanium就可以在網絡上找到~
不過...COBALT就沒有~
知道有誰能夠提供更詳細的資料嗎?

UnitedDream

Cobalt (symbol Co) is a hard, lustrous, silver-gray metal, a chemical element. It is found in various ores, and is used in the preparation of magnetic, wear-resistant, and high-strength alloys. Its compounds are used in the production of inks, paints, and varnishes.

Applications

    * Alloys, such as:
          o Superalloys, for parts in gas turbine aircraft engines.
          o Corrosion- and wear-resistant alloys.
          o High speed steels.
          o Cemented carbides (also called hard metals) and diamond tools.
    * Magnets and magnetic recording media.
          o Alnico magnets.
    * Catalysts for the petroleum and chemical industries.
    * electroplating because of its appearance, hardness, and resistance to oxidation.
    * Drying agents for paints, varnishes, and inks.
    * Ground coats for porcelain enamels.
    * Pigments (cobalt blue and cobalt green).
    * Battery electrodes.
    * Steel-belted radial tires.
    * Cobalt-60 has multiple uses as a gamma ray source:
          o It is used in radiotherapy.
          o It is used in radiation treatment of foods for sterilization (cold pasteurization).
          o It is used in industrial radiography to detect structural flaws in metal parts.

Co-60 is useful as a gamma ray source partially because it can be produced - in known quantity, and very large amounts - by simply exposing natural cobalt to neutrons in a reactor for a given time.

Cobalt-60 (Co-60 or 60Co) is a radioactive metal that is used in radiotherapy. It produces two gamma rays with energies of 1.17 MeV and 1.33 MeV. The 60Co source is about 2 cm in diameter and as a result produces a geometric penumbra, making the edge of the radiation field fuzzy. The metal has the unfortunate habit of producing a fine dust, causing problems with radiation protection. The 60Co source is useful for about 5 years but even after this point is still very radioactive, and so cobalt machines have fallen from favor in the Western world where linacs are common.


General
Name, Symbol, Number         cobalt, Co, 27
Chemical series         transition metals
Group, Period, Block         9, 4, d
Appearance         metallic with gray tinge
Atomic mass         58.933195(5) g/mol
Electron configuration         [Ar] 3d7 4s2
Electrons per shell         2, 8, 15, 2
Physical properties
Density (near r.t.)         8.90 g·cm−3
Liquid density at m.p.         7.75 g·cm−3
Melting point         1768 K
(1495 °C, 2723 °F)
Boiling point         3200 K
(2927 °C, 5301 °F)
Heat of fusion         16.06 kJ·mol−1
Heat of vaporization         377 kJ·mol−1
Heat capacity         (25 °C) 24.81 J·mol−1·K−1
Vapor pressure P/Pa         1         10         100         1 k         10 k         100 k
at T/K         1790         1960         2165         2423         2755         3198
Atomic properties
Crystal structure         hexagonal
Oxidation states         2, 3
(amphoteric oxide)
Electronegativity         1.88 (Pauling scale)
Ionization energies
(more)         1st: 760.4 kJ·mol−1
2nd: 1648 kJ·mol−1
3rd: 3232 kJ·mol−1
Atomic radius         135 pm
Atomic radius (calc.)         152 pm
Covalent radius         126 pm
Miscellaneous–
Electrical resistivity         (20 °C) 62.4 nΩ·m
Thermal conductivity         (300 K) 100 W·m−1·K−1
Thermal expansion         (25 °C) 13.0 µm·m−1·K−1
Speed of sound (thin rod)         (20 °C) 4720 m/s
Young's modulus         209 GPa
Shear modulus         75 GPa
Bulk modulus         180 GPa
Poisson ratio         0.31
Mohs hardness         5.0
Vickers hardness         1043 MPa
Brinell hardness         700 MPa
CAS registry number         7440-48-4
Selected isotopes
Main article: Isotopes of cobalt iso         NA         half-life         DM         DE (MeV)         DP
56Co         syn         77.27 d         ε         4.566         56Fe
57Co         syn         271.79 d         ε         0.836         57Fe
58Co         syn         70.86 d         ε         2.307         58Fe
59Co         100%         Co is stable with 32 neutrons
60Co         syn         5.2714 years         β-         2.824         60Ni

够资料了吧 ？？ 不够再说

chan1314

也叫做kobolt....在德文。。。。
有玩 ragnarok 都知道 kobolt 这个东西吧，满可爱的