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