Patent ID: 7960300

Claim:
A titanium-containing oxide glass in a spherical shape essentially having a composition represented by the formula: ( M 1) 1-x ( M 2) x (Ti 1-y1 ( M 3) y1 ) y2 O z , wherein M1 is one element selected from the group consisting of Ba, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Na, and Ca, M2 is at least one element selected from the group consisting of Mg, Ba, Ca, Sr, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Na, Sc, Y, Hf, Bi, and Ag, M3 is at least one element selected from the group consisting of V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Zr, Nb, Mo, Ru, Rh, Pd, Al, Si, P, Ga, Ge, In, Sn, Sb, and Te, and x, y1, y2, and z satisfy: 0≦x≦0.5, 0≦y1<0.31, 1.4<y2<2.3, 3.9<z<8.0, x+y1≠0 when M1 is Ba, and y1≠0 when M1 and M2 are Ba, and wherein the glass in the spherical shape has a minimum diameter for the spherical shape of 0.5 mm or more.