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金红石型RuO_2和TiO_2在100℃以上的温度下形成部分固熔体,而当氧化物涂覆在Ti或Al_2O_3基体上时,在350—600℃是完全熔合的。本文工作表明Ru_xTi_(1-x)O_2涂层是准稳态固熔体,其中Cl~-离子可能取代亚晶格O~(2-)位置的O~(2-)离子。在总组成范围内,金红石晶格a和C参数的增大是与Cl/Ru原子比为2.5%一致的。这个比值与Ti含量无关,因此认为,Cl~-离子由低价Ru~(3+)(或Ti~(3+))晶种所补偿。在30—100%RuO_2的组成范围内,电导保持以金属特征,这可考虑为沿着(110)方面存在Ru—Oπ键。低价离子与Cl~-离子的平衡提供了沿着C轴电子传递的额外通道,解释了在30～50%RuO_2的浓度范围内高的电导值。
The rutile RuO 2 and TiO 2 form a partial solid solution at a temperature above 100 ° C., whereas the oxide is completely fused at 350-600 ° C. when the oxide is coated on a Ti or Al 2 O 3 matrix. This work shows that the Ru_xTi_ (1-x) O_2 coating is a quasi-steady-state solid solution in which Cl ~ - ions may replace O ~ (2-) ions at the O ~ (2-) site of the sublattice. Within the total composition range, the increase of the a and c parameters of the rutile lattice is consistent with the 2.5% Cl / Ru atomic ratio. This ratio has nothing to do with the Ti content, so that the Cl ~ - ion is compensated by the low-cost seeds of Ru ~ (3 +) (or Ti ~ (3 +)). Within the compositional range of 30-100% RuO 2, the conductance is maintained with a metallic character, which is considered as the presence of Ru-Oπ bonds along (110). The balance of low-valent ions with Cl ~ - ions provides additional channels for electron transfer along the C-axis, explaining the high conductance values in the concentration range of 30-50% RuO 2.