中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

50 records (took 0.021 seconds)

    IRON POWDER CONTAINING SILICON
    1.
    发明专利
    IRON POWDER CONTAINING SILICON 失效

    公开(公告)号：JPH10317023A

    公开(公告)日：1998-12-02

    申请号：JP11093298

    申请日：1998-04-21

    Applicant: BASF AG

    Inventor： SIMON JOACHIM DR ,  SCHLEGEL REINHOLD ,  LEUTNER BERND DR

    IPC: B22F9/16 ,  B22F9/12 ,  B22F9/30 ,  C22B5/20 ,  H01F1/20 ,  H01F1/24

    Abstract: PROBLEM TO BE SOLVED: To efficiently produce silicon-contg. iron powder contg. impurities in a smaller amt. at a low cost by using silanes or nohalogen contg. org. silanes exclusive of tolyethylsilane and tetraethoxysilane as the volatile silicon compd. to be used for a raw material. SOLUTION: The silane suitable as the raw material is silanes like monosilanes which are gas and volatile at room temp. Pyrolysis of pentacarbonyl iron and the volatile silicon compd. is preferably executed under the absolute pressure of 1 to 2 bar at 200 to 600 deg.C. If the pyrolysis is executed in the presence of ammonia, the decomposition of the pentacarbonyl iron to iron and carbon monoxide is accelerated. The resulted silicon-contg. iron powder is spherical particles of 0.005 to 10 μm in average diameter which are obtd. in a finely dispersed state. This silicon-contg. iron powder is made into the powder substantially not contg. carbon, oxygen and nitrogen by subjecting the powder to heating reduction in hydrogen gaseous flow.

    FINE PHOSPHORUS-CONTAINING IRON, PRODUCTION THEREOF AND DEVICE FOR EXECUTING THE METHOD
    2.
    发明专利
    FINE PHOSPHORUS-CONTAINING IRON, PRODUCTION THEREOF AND DEVICE FOR EXECUTING THE METHOD 失效

    公开(公告)号：JPH10298616A

    公开(公告)日：1998-11-10

    申请号：JP3289798

    申请日：1998-02-16

    Applicant: BASF AG

    Inventor： LEUTNER BERND DR ,  FRIEDRICH GABRIELE ,  SCHLEGEL REINHOLD

    IPC: B22F9/16 ,  B22F1/00 ,  B22F9/28 ,  B22F9/30 ,  C22C33/02 ,  C22C38/00

    Abstract: PROBLEM TO BE SOLVED: To produce a fine phosphorus-containing iron having a low ratio of a second component composed of spheroidal particles or spherical particle filiform aggregate with the phosphorus content changeable in the wide range by heating and vaporizing liquefied iron pentacalbonyl and reacting with phosphorus compound under existence of ammonia in vapor phase. SOLUTION: The liquefied Fe(CO)5 is heated and vaporized by electric heating, and this vapor is introduced from the top part of a heatable decomposing tube together with NH3 by using 10-90% CO gas as carrier and reacted with PH3 in the vapor phase. The decomposing tube is set to have two kinds of different temp. zones, and the temp. at the bottom part is made higher than the temp. at the top part by e.g. >=20 deg.C. Further, NH3 in the gaseous mixture is about 0.1-10% and quantity of Fe(CO)5 excessively used is more than about ten times the necessary quantity. The reaction temp. is desirable to be >=200 deg.C. By this method, the fine phosphorus-containing iron composed of the sheroidal particles of 1-10 μm average particle diameter or the filiform aggregate of 1-3 μm spherical diameter and containing 0.1-50 wt.% P and

    PRODUCTION OF METAL COATED HARD MATERIAL
    3.
    发明专利
    PRODUCTION OF METAL COATED HARD MATERIAL 失效

    公开(公告)号：JP2000336484A

    公开(公告)日：2000-12-05

    申请号：JP2000050297

    申请日：2000-01-21

    Applicant: BASF AG

    Inventor： SCHLEGEL REINHOLD ,  FRIEDRICH GABRIELE ,  REMMELE MICHAEL

    IPC: C04B35/628 ,  B22F1/02 ,  C23C16/16 ,  C23C16/32 ,  C23C18/12

    Abstract: PROBLEM TO BE SOLVED: To provide an easy and economical method for producing a metal coated hard material. SOLUTION: A soln., in which a hard material such as diamond, cubic boron nitride, boron carbide, silicon carbide and silicon nitride or the carbide, nitride, boride, silicide or the like of titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium and molybdenum, and a hard material of metallic carbonyl such as iron pentacarbonyl are suspended, is heated and decomosed, and a metallic layer is formed on the surface of the hard material. Moreover, the metallic layer can be formed on the hard material from metallic carbonyl present in the state of the vapor phase.

    PHOSPHORUS-CONTAINING IRON POWDER
    5.
    发明专利
    PHOSPHORUS-CONTAINING IRON POWDER 失效

    公开(公告)号：JPH10298613A

    公开(公告)日：1998-11-10

    申请号：JP3588798

    申请日：1998-02-18

    Applicant: BASF AG

    Inventor： LEUTNER BERND DR ,  FRIEDRICH GABRIELE ,  SCHLEGEL REINHOLD

    IPC: C01B25/08 ,  B22F1/00 ,  B22F9/04 ,  B22F9/30 ,  C22C1/04 ,  C22C33/02 ,  C22C38/00

    Abstract: PROBLEM TO BE SOLVED: To produce phosphorous-contg. iron powder variable in the content of phosphorus in a wide range and extremely low in the content of inevitable components by mixing metallic iron in the form of pulverized carbonyl iron and a phosphorus element, executing heating to a relatively low temp. and pulverizing the obtd. product into powder. SOLUTION: Pulverized carbonyl iron as metallic iron and a phosphorus element are mixed, preferably, at the mass ratio of (99:1) to (70:30), and heating is executed. The pulverized carbonyl iron can be obtd. by subjecting carbonyl iron obtd. by thermally decomposing pentacarbonyliron in vapor phases to pulverization to about 1 to 10 μm average size, the content of C is regulated to, by weight, =300 deg.C, preferably, at about 380 to 550 deg.C in an inert gas atmosphere. The phosphorus element is used preferably in the form of red phosphorus.

    8.
    发明专利
    未知

    公开(公告)号：DE59806783D1

    公开(公告)日：2003-02-06

    申请号：DE59806783

    申请日：1998-04-20

    Applicant: BASF AG

    Inventor： SIMON DR ,  SCHLEGEL REINHOLD ,  LEUTNER DR

    IPC: B22F9/16 ,  B22F9/12 ,  B22F9/30 ,  C22B5/20 ,  H01F1/20 ,  H01F1/24

    Abstract: Production of Si-containing Fe powder comprises thermally decomposing a gas mixture containing Fe-pentacarbonyl and a volatile Si-compound. The volatile Si-compound is a silane or organosilane, except triethylsilane and tetraethoxysilane. Also claimed is an apparatus for carrying out the process comprising: (a) a heated decomposition pipe; (b) a device for adjusting two different temperature zones; (c) a device for vaporising liquid Fe-pentacarbonyl; (d) a device for dosing and mixing gases; and (e) a separator for Si-containing Fe powder.

Patent Agency Ranking