{HEAD ~ the first step} of forming, on a joining surface of a base body of a metal oxide, {TAIL ~ a solution layer} formed of a solution in which a first compound containing aluminum and oxygen and a second compound containing boron and oxide dissolve, 
of forming
{ HEAD ~ the first step } of forming , on a joining surface of a base body of a metal oxide , { TAIL ~ a solution layer } formed of a solution in which a first compound containing aluminum and oxygen and a second compound containing boron and oxide dissolve ,
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH