公开(公告)号：JPH026374A

公开(公告)日：1990-01-10

申请号：JP15770788

申请日：1988-06-24

Applicant: AGENCY IND SCIENCE TECHN ,  DAIHEN CORP

Inventor： EHATA YOSHIHIRO ,  IWASA MIKIO ,  KINOSHITA MINORU ,  TAKAI HIROSHI ,  OKUDA KOJI ,  NISHI TOKUZO

IPC: C04B37/00

Abstract: PURPOSE:To obtain the title binder capable of bonding in the air and of producing high mechanical strength at elevated temperatures by mutually mixing an alkaline earth metal oxide, Al2O3 and/or SiO2 and ground powder of Si3N4 ceramic. CONSTITUTION:A composition prepared by blending a total of (1) 15-35wt.% of an alkaline earth metal oxide (e.g., CaO) and (2) 85-65wt.% of ground powder of Si3O4 ceramic to effect bonding by heating to 1500-1600 deg.C.

公开(公告)号：JPH02160675A

公开(公告)日：1990-06-20

申请号：JP31535988

申请日：1988-12-14

Applicant: AGENCY IND SCIENCE TECHN ,  DAIHEN CORP

Inventor： EHATA YOSHIHIRO ,  KAYAMA MASANORI ,  IWASA MIKIO ,  TAKAI HIROSHI ,  NISHI TOKUZO ,  OKUDA KOJI

IPC: C04B37/00

Abstract: PURPOSE:To raise bond strength of silicon nitride ceramics especially at high temperature in laying an electroconductive binder on a bonding part between ceramics, sending an electric current to the binder and electrically bonding the ceramics by using a specific binder. CONSTITUTION:In electric bonding wherein an electroconductive binder is laid on a binding part between ceramics, an electric current is sent to the binder to generate Joule's heat, by which the bonding part is heated, the binder having the following composition is used. Namely, the binder is prepared by blending an alkaline earth metal fluoride (e.g. CaF2) or alkali metal fluoride (e.g. NaF) with at least one of Al2O3 and SiO2 and silicon nitride powder, a main component of ceramic to be bonded. The blending ratio is usually >= about 10wt.% alkaline earth metal fluoride or alkali metal fluoride,

公开(公告)号：DE3709261A1

公开(公告)日：1988-09-29

申请号：DE3709261

申请日：1987-03-20

Applicant: AGENCY IND SCIENCE TECHN ,  KURIMOTO LTD

Inventor： IWASA MIKIO ,  KINOSHITA MAKOTO ,  WATANABE TAKASHI ,  SAKAGUCHI KEIZO

IPC: C04B35/111 ,  C04B35/71 ,  C22C29/12 ,  B22F3/16 ,  C04B35/10

Abstract: Ceramics produced by the process of the present invention do not have the disadvantages of conventional ceramics which can be machined only with relative difficulty and whose use on a larger scale is ruled out despite the great hardness and the excellent abrasion (wear) resistance. A remarkably good machineability is achieved by the addition of a specified iron content to pure aluminium oxide. Although this process reduces the hardness, the abrasion resistance and the physical strength remain in an acceptable range. The good machineability is achieved according to the invention without adverse effects on the properties and advantages of the ceramic, apart from the heat resistance.

公开(公告)号：JPS63159251A

公开(公告)日：1988-07-02

申请号：JP30733486

申请日：1986-12-23

Applicant: AGENCY IND SCIENCE TECHN ,  KURIMOTO LTD

Inventor： IWASA MIKIO ,  KINOSHITA MINORU ,  WATANABE TAKASHI ,  SAKAGUCHI KEIZO

IPC: C04B35/00 ,  C04B35/10 ,  C22C1/05 ,  C22C29/12