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1.用称重、化学分析、X射线相分析等方法研究六硼化镧于800及1000°在空气中的氧化作用。 2.在试验中采用酸洗除氧化膜方法求得真实氧化量、结果表明以原试样单位表面积计的氧化量(μ)随温度、时间的增加而增加。 3.生成物之一氧化硼在试验条件下将部分挥发。由于氧化硼挥发速度的差(己廾)导致800°与1000°时生成的氧化膜之组成有所不同,而试样在各温度下不同的重量变化系氧化增重和氧化硼挥发而减重两因素加合的结果。
1. Weighing, chemical analysis, X-ray phase analysis and other methods to study the lanthanum hexabolate oxidation at 800 and 1000 ° in the air. In the experiment, the actual oxidation amount was obtained by pickling and removing the oxide film. The results showed that the oxidation amount (μ) in terms of the surface area of the original sample increased with the increase of temperature and time. 3. One of the products of boron oxide in the experimental conditions will be part of the volatile. The composition of the oxide film formed at 800 ° and 1000 ° is different due to the difference in the evaporation rate of boron oxide (hexahydrite), and the weight change of the sample at each temperature is the weight gain of oxidation and weight loss of boron oxide Addition of two factors results.