| 摘要 |
1291095 Metallizing ceramics by sintering RCA CORPORATION 23 Dec 1969 [26 Dec 1968] 62603/69 Heading C7D Ceramics such as Al 2 O 3 and Be O are metallized by coating with a powder mixture containing in parts by weight 10-90 uncoated W or Mo 4-80 W or M coated with Fe, Co and/or Ni, 2-27 at least one of MgAl silicate, Ca Al silicate and Mn silicate, and sintering at 1100‹ -1500‹ C. in a reducing atmosphere e. g. 10-40% H 2 , 90-60%N 2 with dewpoint above -25‹ C. The coating may contain up to 10 parts weight Mn, a binder e.g. ethyl cellulose and a vehicle e. g. ethylene glycol dilutyl ether. The preferred coating contains 1-12 parts Mg Al silicate, 1-12 parts Ca Al silicate and 0À2-3 parts Mn silicate per 100 parts metal, powder layer thickness is 12-100Á and sintered thickness 12-36Á. A Ni coating may be plated on the metallized layer prior to brazing to a metal or a metallized ceramic. |
