The method 1 wherein {HEAD ~ the heating} in step is from about 1100° C. to {TAIL ~ about 1360° C} 
is to
The method 1 wherein { HEAD ~ the heating } in step is from about 1100 ° C. to { TAIL ~ about 1360 ° C }
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL