论文部分内容阅读
LECO RO-316氧分析器以普遍的惰性气氛熔融法为基础测定在连续高温下释放的氧。试样在石墨双坩埚中熔融(外坩埚最多能用20次、而装试样的内坩埚必须每次更换)。其绘图器内带有称为“Sepragram”程序,用此程序可以记录和绘制在不同时间和不同温度下的抽取过程中出现的各种峰形。只要这些峰是能分开的,则就可确定试样内具有的各种氧化相。 Sommer和Ohls用这种新型氧分析器测定少量氧(高至10微克/克),计算的检测限为4.3微克/克。他们还测定了纯铁中与铝结合的氧(见图1),Al_2O_3峰特征峰总是出现在53秒后和在2050℃,氧化铝量低于检测限。他们使用“基线法”改善了重现性。
The LECO RO-316 oxygen analyzer determines the oxygen released at a continuous high temperature based on a common inert-atmosphere melting method. The sample is melted in a graphite double crucible (the outer crucible can be used up to 20 times, and the inner crucible containing the sample must be replaced each time). In its plotter there is a program called “Sepragram”, which records and plots various peak shapes that appear during decimation at different times and temperatures. As long as these peaks are separable, the various oxidic phases found in the sample can be determined. Sommer and Ohls used this new oxygen analyzer to measure small amounts of oxygen (up to 10 μg / g) with a calculated limit of detection of 4.3 μg / g. They also measured the oxygen bound to aluminum in pure iron (see Figure 1). The characteristic peaks of the Al 2 O 3 peak always appeared after 53 seconds and at 2050 ° C, with the alumina content below the limit of detection. They used the “baseline method” to improve reproducibility.