公开(公告)号：DE4016861A1

公开(公告)日：1991-08-08

申请号：DE4016861

申请日：1990-05-25

Applicant: HOECHST AG

Inventor： ALDINGER FRITZ DR ,  FISCHER HANNES DR ,  HESSEL FRIEDRICH DR ,  ROOSEN ANDREAS DR

IPC: B28B1/14 ,  C04B35/00 ,  C04B35/622 ,  C04B35/632 ,  C04B35/634 ,  C08F16/38 ,  C08K3/00 ,  C08K3/22 ,  C08L29/14

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.

公开(公告)号：DE58903850D1

公开(公告)日：1993-04-29

申请号：DE58903850

申请日：1989-02-01

Applicant: HOECHST AG

Inventor： HAMMINGER RAINER DR ,  ALDINGER FRITZ DR

IPC: C04B35/56 ,  C04B35/565 ,  C04B35/575

公开(公告)号：DE3840773A1

公开(公告)日：1990-06-07

申请号：DE3840773

申请日：1988-12-03

Applicant: HOECHST AG

Inventor： PETZOW GUENTER PROF DR ,  RIEDEL RALF DR ,  SEHER MARTIN ,  PEUCKERT MARCELLUS DR ,  BRUECK MARTIN DIPL ING ,  GERDAU THOMAS DR ,  KLEINER HANSS-JERG DR ,  VAAHS TILO DR ,  ALDINGER FRITZ DR

IPC: C01B21/068 ,  C04B35/58 ,  C04B35/589 ,  C04B35/593 ,  C08G77/48 ,  C08G77/62

公开(公告)号：DE58909501D1

公开(公告)日：1995-12-21

申请号：DE58909501

申请日：1989-11-29

Applicant: HOECHST AG

Inventor： PEUCKERT MARCELLUS DR ,  BRUECK MARTIN ,  GERDAU THOMAS DR ,  KLEINER HANS-JERG DR ,  VAAHS TILO DR ,  ALDINGER FRITZ DR ,  PETZOW GUENTER DR ,  RIEDEL RALF DR ,  SEHER MARTIN

IPC: C01B21/068 ,  C04B35/58 ,  C04B35/589 ,  C04B35/593 ,  C08G77/48 ,  C08G77/62

公开(公告)号：DE59009261D1

公开(公告)日：1995-07-27

申请号：DE59009261

申请日：1990-02-07

Applicant: HOECHST AG

Inventor： PEUKERT MARCELLUS DR ,  BRUECK MARTIN DR ,  VAAHS TILO DR ,  KLEINER HANS-JERG DR ,  ALDINGER FRITZ DR

IPC: C04B35/584 ,  C04B35/58 ,  C04B35/589 ,  C04B41/45 ,  C04B41/81 ,  C04B41/84 ,  C04B41/87 ,  C08G77/62

公开(公告)号：DE3939448A1

公开(公告)日：1990-06-07

申请号：DE3939448

申请日：1989-11-29

Applicant: HOECHST AG

Inventor： PEUCKERT MARCELLUS DR ,  BRUECK MARTIN DIPL ING ,  VAAHS TILO DR ,  KLEINER HANSS-JERG DR ,  ALDINGER FRITZ DR

IPC: C04B35/58 ,  C04B35/589 ,  C04B35/593 ,  C04B41/50 ,  C04B41/84 ,  C04B41/87

Abstract: The invention relates to a high-strength ceramic composite, in particular made from silicon nitride, a process for its preparation and its use. The process comprises impregnating an open-pore matrix with a molten polysilazane in a first step and, in a second step, heating the impregnated matrix to 800 DEG to 2500 DEG C. under a blanketing gas, such as nitrogen or a noble gas, or to 800 DEG to 1500 DEG C. under a gas containing ammonia. The high-strength ceramic composite prepared can be used as a component to be subjected to high thermal, mechanical or corrosive stress.

公开(公告)号：DE3840781A1

公开(公告)日：1990-06-07

申请号：DE3840781

申请日：1988-12-03

Applicant: HOECHST AG

Inventor： PEUCKERT MARCELLUS DR ,  BRUECK MARTIN DIPL ING ,  GERDAU THOMAS DR ,  VAAHS TILO DR ,  KLEINER HANSS-JERG DR ,  ALDINGER FRITZ DR

IPC: C04B41/84 ,  C04B35/58 ,  C04B35/589 ,  C04B35/80 ,  C04B41/45 ,  C04B41/49 ,  C04B41/50 ,  C04B41/81 ,  C04B41/87

Abstract: The invention relates to a fibre-containing composite ceramic and a process for the preparation thereof. The process comprises, in a first step, impregnating fibres with a polysilazane melt, in a second step, converting the polysilazane in the fibres into the infusible state, and, in a third step, heating the impregnated fibres to from 800 to 2000 DEG C in a nitrogen, noble-gas or ammonia atmosphere.

公开(公告)号：DE3824614A1

公开(公告)日：1990-01-25

申请号：DE3824614

申请日：1988-07-20

Applicant: HOECHST AG

Inventor： GERDAU THOMAS DR ,  KLEINER HANS-JERG DR ,  BRUECK MARTIN DIPL ING ,  PEUCKERT MARCELLUS DR ,  ALDINGER FRITZ DR

IPC: C01B21/068 ,  C04B35/58 ,  C04B35/589 ,  C08G77/48 ,  C08G77/62 ,  C08L83/16 ,  D01F9/10

Abstract: The invention relates to a process for the production of ceramic material containing silicon nitride, such as fibers, coatings or moldings. In this process, polymeric hydridochlorosilazanes are rendered infusible at a temperature below their softening point by treatment with gaseous NH3 and are then pyrolyzed in an atmosphere containing NH3 at 700 DEG to 1500 DEG C. Fibers, coatings or moldings containing silicon nitride are produced by first producing appropriate structures from a melt of the polymeric hydridochlorosilazane and then rendering them infusible and pyrolyzing them.

公开(公告)号：DE3733728A1

公开(公告)日：1989-04-20

申请号：DE3733728

申请日：1987-10-06

Applicant: HOECHST AG

Inventor： GERDAU THOMAS DR ,  KLEINER HANS-JERG DR ,  PEUCKERT MARCELLUS DR ,  BRUECK MARTIN ,  ALDINGER FRITZ DR

IPC: C04B35/00 ,  C04B35/58 ,  C04B35/589 ,  C08G77/48 ,  C08G77/62

Abstract: The polymeric hydridosilazanes are prepared by reacting polymeric hydridochlorosilazanes with NH3. Pyrolysis of the polymeric hydridosilazanes gives a ceramic material containing silicon nitride.