Alumina, the matrix material, has a thermal expansion coefficient in {HEAD ~ the order} of {TAIL ~ 8 10 6 K} 1  
of
Alumina , the matrix material , has a thermal expansion coefficient in { HEAD ~ the order } of { TAIL ~ 8 10 6 K } 1
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH