It would also be preferable for the dispersed particles to include at least one oxide selected from {HEAD ~ a group} consisting of silicon oxide, aluminum oxide, zirconium oxide, and {TAIL ~ titanium oxide} 
consisting of
It would also be preferable for the dispersed particles to include at least one oxide selected from { HEAD ~ a group } consisting of silicon oxide , aluminum oxide , zirconium oxide , and { TAIL ~ titanium oxide }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL