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