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Cu$_2$O 양을 변화시켜 3성분 xCu$_2$O-(20-x)Li$_2$O-80B$_2$O$_3$ ($\texttt{x}$ = 0.0 $\sim$ 5.0 mole\%) 유리들을 제작하였다. 유리들에 대한 직류 전기전도도, 활성화 에너지, 경도 그리고 굴절률을 조사하여 유리들의 전기전도 기구 (mechanism)와 유리 구조변화를 조사하였다. Cu$_2$O 양의 증가에 따라 직류 전기전도도는 감소하였으며, 활성화 에너지는 \texttt{x} = 0.6 mole\%에서 1.15 eV의 최대값을 얻었다. 이러한 변화는 Li$^+$-Cu$^+$ (혹 Cu$^{2+}$) 양이온들의 유동성이 성분비에 따라 다르기 때문인 것으로 나타났다. 경도의 변화는 Cu$_2$O의 양에 따라 유리 망목구조 내에서 형성되어진 BO$_4$ 단위수의 감소와 팔면체 단위인 BO$_4$-BO$_4$ 단위 수의 증가에 의존하였으며, 굴절률의 변화는 높은 분극률을 갖는 Cu$^+$ 양이온의 수와 유리 망목구조의 몰 부피를 증가시키는 BO$_4$-BO$_4$ 단위구조들의 형성에 의존함을 알 수 있었다.


Ternary \texttt{x}Cu$_2$O-(20-x)Li$_2$O-80B$_2$O$_3$ ($\texttt{x}$ = 0.0 $\sim$ 5.0 mole\%) glasses were fabricated with different content ratios of Cu$_2$O mol\%. We investigated the electric conductivity, activation energy, hardness, and refractive index for these glasses. The dc-conductivity decreased with increasing Cu$_2$O content, and the activation energy had a maximum value, E$_a$=1.15 eV, at the ratio $\texttt{x}$ = 0.6 mole\% became the mobility of the Li$^+$-Cu$^+$ (or Cu$^{2+}$) cation contributed to the behaviors of the electric properties with different Cu$_2$O mol\%. The hardness characteristics depended on the fraction of tetrahedral BO$_4$ units and octahedral BO$_4$-BO$_4$ units in the glass network. In the region of small of Cu$_2$O content below $\texttt{x}$ = 0.6 mole\%, the refractive index increased due to the formation of Cu$^+$ ions with high polarizability, but in the region of high content above $\texttt{x}$ = 0.6 mole\%, the refractive index decreased with the increasing molar volume due to the network formation of octahedral BO$_4$-BO$_4$ units.


Ternary \texttt{x}Cu$_2$O-(20-x)Li$_2$O-80B$_2$O$_3$ ($\texttt{x}$ = 0.0 $\sim$ 5.0 mole\%) glasses were fabricated with different content ratios of Cu$_2$O mol\%. We investigated the electric conductivity, activation energy, hardness, and refractive index for these glasses. The dc-conductivity decreased with increasing Cu$_2$O content, and the activation energy had a maximum value, E$_a$=1.15 eV, at the ratio $\texttt{x}$ = 0.6 mole\% became the mobility of the Li$^+$-Cu$^+$ (or Cu$^{2+}$) cation contributed to the behaviors of the electric properties with different Cu$_2$O mol\%. The hardness characteristics depended on the fraction of tetrahedral BO$_4$ units and octahedral BO$_4$-BO$_4$ units in the glass network. In the region of small of Cu$_2$O content below $\texttt{x}$ = 0.6 mole\%, the refractive index increased due to the formation of Cu$^+$ ions with high polarizability, but in the region of high content above $\texttt{x}$ = 0.6 mole\%, the refractive index decreased with the increasing molar volume due to the network formation of octahedral BO$_4$-BO$_4$ units.