【摘要】 利用激光加热超高温气动悬浮熔体和皮秒拉曼光谱测试技术耦合，有效抑制超高温黑体辐射对拉曼光谱的影响，获得了高信噪比的二元镁钛酸盐系列熔体拉曼光谱。定量分析了熔体中团簇结构的分布及其随组分浓度的变化规律。定量分析表明：MgO-TiO₂二元系熔体中存在H₀、Q₀、Q₁、Q₂和Q₃微结构单元，且随TiO₂浓度的增加，熔体中四配位TiO₄四面体逐渐向六配位TiO₆八面体转变。更多还原

【Abstract】 The domestic-developed super pneumatic suspension and laser heated picosecond high temperature Raman spectroscopy test system greatly shields the interference of blackbody radiation on Raman signal under high temperature and extreme conditions. In-situ Raman spectra of binary MgO-TiO₂ series melts were measured with high SN（Signal to Noise Ratio） at 2 003 K. The accurate quantitative distribution of the molar percentage content of Q_i and H₀ species were thus described quantitatively with the change of TiO₂ composition. The results show that there are H₀, Q₀, Q₁, Q₂ and Q₃ clusters in binary MgO-TiO₂ system melt, With the increase of TiO₂ concentration, the tetrahedron of four-coordinated TiO₄ in the melt gradually transforms into six-coordinated TiO₆ octahedron.更多还原