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本文用差热分析、恒温热处理、X射线衍射等方法,对LiIO_3在常压的相变过程做了进一步的研究。对于LiIO_3的常压相变机制有了较为详尽的了解 。并发现LiIO_3在高温可相对稳定存在三个相:β,η和δ,它们可分别自行熔化,其熔点相应为:432℃,421℃和416℃,从它们的热经历和存在的温度范围,表明其稳定性顺序为β>η>δ。在室温干燥空气中,与α相和β相共存的还有相,相升温放热转变为β相。在α相存在的温区里,相经过长时间热处理并不转变为α相,同时,相转变为β相的温度比α相高。与α→β的情况相同,β对→β也有诱导作用。而且的存在对α→β也有促进作用。θ相(θ_1与θ_2)与γ相一样,是相变过程的中间过渡相。
In this paper, differential thermal analysis, constant temperature heat treatment, X-ray diffraction and other methods, LiIO_3 in the normal pressure of the phase transition process to do further research. For LiIO_3 atmospheric pressure transformation mechanism has a more detailed understanding. It has been found that there are three phases of LiIO_3 which can be relatively stable at high temperature: β, η and δ, which can be melted by themselves, corresponding to the melting points of 432 ° C, 421 ° C and 416 ° C. From their thermal history and temperature range, The order of stability is β> η> δ. Dry air at room temperature, and α phase and β phase coexist there phase, the phase transition temperature exotherm into β phase. In the temperature range in which α phase exists, the phase does not change to α phase after a long time heat treatment, and at the same time, the phase transition to β phase is higher than α phase. As in the case of α → β, β also induces → β. And the presence of α → β also promote role. Theta phases (θ_1 and θ_2), like the γ phase, are intermediate transition phases of the phase transition.