Abstract: Boron containing phosphor compositions having the formulas (1) M3Ln2(BO3)4 doped with at least one activator selected from the group of Eu2+, Mn2+, Pb2+, Ce3+, Eu3+, Tb3+, and Bi3+ where M is at least one of Mg, Ca, Sr, Ba, or Zn, and Ln is at least one of Sc, Y, La, Gd, or Lu; (2) M2?xM?x(Al,Ga)2?y(Si,Ge)yB2O7?zNz:Eu2+, Mn2+, Pb2+ where M? is one or more of alkali metals Na and/or K, M? is one or more of alkaline earth Mg, Ca, Sr, Ba or Zn, 0?x?2, 0?y?2, 0?z?4; and z=x+y; (3) M?2?x+yM?x?y(Al,Ga)2?y(Si,Ge)yB2O7?x?yNzXy:Eu2+, Mn2+, Pb2+ where M? is one or more of alkali metals Na and/or K, M? is one or more of alkaline earth metals Mg, Ca, Sr, Ba and/or Zn, 0?x?2, 0?y?2, 0?z?4; z=x+y, X=F and/or Cl, and 0?y??2; (4) M?2?xM?xAl2?y+ySiy?y?B2O7?z?yNzXy:Eu2+, Mn2+, Pb2+ where M? and M? are defined above, 0?x?2, 0?y?2, 0?z?4; z=x+y, X=F and/or Cl, and 0?y??2; (5) M?2?x+xM?x?x?Al2?y+y?Siy?y?B2O7?z?x??y?NzX(x?+y?):Eu2+, Mn2+, Pb2+, where M? and M? are defined above, 0?x?2, 0?y?2, 0?z?4; z=x+y, X=F and/or Cl, and 0?y??

Abstract: A system having a heat source, a component coupled to the heat source, and at least one thermistor coupled to the component and adapted to monitor temperature of the component, wherein the thermistor has a core-shell microstructure having a shell disposed about a core, the core comprising Cr2O3 and the shell comprising a rare earth element compound.