中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

16 records (took 0.021 seconds)

    2.
    发明专利
    未知

    公开(公告)号：DK0625489T3

    公开(公告)日：1998-12-07

    申请号：DK94107475

    申请日：1994-05-13

    Applicant: HOECHST AG

    Inventor： HESSEL FRIEDRICH DR ,  MEYER WOLFGANG DR ,  SEITZ KATHARINA DR ,  ROOSEN ANDREAS DR ,  WEGNER GERHARD PROF DR ,  SIGMUND WOLFGANG DR

    IPC: C04B35/00 ,  C04B35/10 ,  C04B35/634 ,  C08K5/10

    Abstract: The invention relates to a casting composition containing a ceramic powder, an organic solvent, binders, plasticisers and a dispersant, which is suitable for producing green ceramic sheets by the tape casting process. The dispersant present in the casting composition of the invention is a polyvinyl alcohol - fatty acid ester having a degree of conversion (degree of esterification) in the range from 50 to 100 %. The invention also relates to the use of such a casting composition for producing green ceramic sheets and a process for producing ceramic substrates using the green sheet thus produced.

    3.
    发明专利
    未知

    公开(公告)号：DE59405335D1

    公开(公告)日：1998-04-09

    申请号：DE59405335

    申请日：1994-05-13

    Applicant: HOECHST AG

    Inventor： HESSEL FRIEDRICH DR ,  SEITZ KATHARINA DR ,  ROOSEN ANDREAS DR ,  WEGNER GERHARD PROF DR ,  MEYER WOLFGANG DR ,  SIGMUND WOLFGANG DR

    IPC: C04B35/00 ,  C04B35/10 ,  C04B35/634 ,  C08K5/10

    Abstract: The invention relates to a casting composition containing a ceramic powder, an organic solvent, binders, plasticisers and a dispersant, which is suitable for producing green ceramic sheets by the tape casting process. The dispersant present in the casting composition of the invention is a polyvinyl alcohol - fatty acid ester having a degree of conversion (degree of esterification) in the range from 50 to 100 %. The invention also relates to the use of such a casting composition for producing green ceramic sheets and a process for producing ceramic substrates using the green sheet thus produced.

    5.
    发明专利
    未知

    公开(公告)号：DE59208880D1

    公开(公告)日：1997-10-16

    申请号：DE59208880

    申请日：1992-05-06

    Applicant: HOECHST AG

    Inventor： ALDINGER FRITZ DR ,  BESTGEN HARRO DR ,  KOESTLER CHRISTINE DR ,  ROOSEN ANDREAS DR

    IPC: G01N27/409 ,  G01N27/26 ,  G01N27/407 ,  G01N27/417

    Abstract: A description is given of a planar oxygen sensor based on zirconium dioxide is suitable for measuring the oxygen content in combustion furnaces and/or in the exhaust gases of internal combustion engines. Disposed on an outside surface of the sensor is a noble-metal measuring electrode and in its interior there is a reference electrode which is connected in a conducting manner to an outside contact and is surrounded by two zirconium dioxide layers. In the region near its periphery, one of these layer has a hole whose outwardly directed part is sealed by a glass solder. The inner part of the hole is filled with sintered platinum which produces a conductive connection between a platinum wire which leads outwards through the hole as an external contact and a platinum conductor track which is disposed on the inner boundary surface of the zirconium dioxide layer and leads to the reference electrode. A method of manufacturing the oxygen sensor is also described.

    7.
    发明专利
    未知

    公开(公告)号：DE4316924C2

    公开(公告)日：1996-03-21

    申请号：DE4316924

    申请日：1993-05-20

    Applicant: HOECHST AG

    Inventor： HESEL FRIEDRICH DR ,  SEITZ KATHARINA DR ,  ROOSEN ANDREAS DR ,  WEGNER GERHARD PROF DR ,  MEYER WOLFGANG DR ,  SIGMUND WOLFGANG DR

    IPC: C04B35/00 ,  C04B35/10 ,  C04B35/634 ,  C08K5/10

    Abstract: The invention relates to a casting composition containing a ceramic powder, an organic solvent, binders, plasticisers and a dispersant, which is suitable for producing green ceramic sheets by the tape casting process. The dispersant present in the casting composition of the invention is a polyvinyl alcohol - fatty acid ester having a degree of conversion (degree of esterification) in the range from 50 to 100 %. The invention also relates to the use of such a casting composition for producing green ceramic sheets and a process for producing ceramic substrates using the green sheet thus produced.

    Thermal conductivity measuring appts.
    8.
    发明专利
    Thermal conductivity measuring appts. 未知

    公开(公告)号：DE4143602C2

    公开(公告)日：1998-07-30

    申请号：DE4143602

    申请日：1991-09-18

    Applicant: HOECHST AG

    Inventor： GUETHER HANS-MICHAEL ,  ROOSEN ANDREAS DR ,  BOECKER WOLFGANG DR ,  SOELTER HANS-JOACHIM DR

    IPC: G01N25/18 ,  B22F3/10

    Abstract: The apparatus comprises a closed oven with atmosphere and temp. control, opposed optical input and output apertures, an electrical thermoelement and a specimen holder. A laser (1) near the first input aperture is directed at the specimen (7). Infrared radiation from the specimen's underside is detected by a detector (9) near the first output aperture. Measured values from the thermoelement are converted into conductivity values by a connected data processing system. A second laser (8) is mounted outside the oven near a second input aperture with a contactless area detector (6) near a second output aperture. The laser directions are mutually perpendicular and the lasers are electronically coupled. The second laser and detector are connected to the data processor via a measurement cable.

Patent Agency Ranking