硼酸塩ガラスの光学的性質

概要

論文の詳細を見る
Refractive indices and Abbe's numbers of borate glasses of binary and ternary systems containing the oxides of Li, Na, K, Be, Mg, Ca, Sr, Ba, Al, La, Ti, Zr, Th, Nb, Ta, and W were measured. The relation of composition to refractive index, nD and Abbe's number (Table l) was able to be expressed by a formula which does not contain the values of specific gravity, viz. nD = 1.455 +Σ__ia_ix_I + Σ__ib_ix_I^2 , v = (nD - 1)/(0.521 + Σ__ik_ix_I)nD, f where ai, bi, ki, are the component factors, x_I is the molar fraction of M_<in>O_m. From the'values of nD and y of borate glasses the component factors were calculated with a result that bi on the network former is zero, and the values a_I/k_I of modifier is larger than those of network former. And the intermediated A1,Be, La, etc., do not fit in with above equations, which may be explained by the change from modifier to network former in conformity with external circumstances such as the kind or quantity of existing components.
社団法人日本セラミックス協会の論文
1962-04-01