空气环境下PtO_2分解实验的研究  

Research on the Decomposition Experiment of PtO_2 in Air Environment

作　　者：牛亚路 宋凯[1] 孙建平[2] 李旭[2] 叶萌 

机构地区：[1]太原理工大学,山西太原030024 [2]中国计量科学研究院,北京100029 [3]西安工程大学,陕西西安710048

出　　处：《计量学报》2018年第1期33-38,共6页Acta Metrologica Sinica

基　　金：国家自然科学基金(51576181)

摘　　要：标准铂电阻温度计的感温元件高纯铂丝的氧化是影响其测温性能的重要因素之一。利用差示量热扫描仪(DSC)和X射线光电子能谱技术(XPS),研究铂丝氧化的主要产物PtO_2在不同温度下的生成产物,以及不同产物的生成和分解温度。结果表明:当温度在550~820℃范围内时,随着温度的升高,PtO_2会逐渐分解生成Pt O和Pt,且温度越高生成的Pt含量越多;当温度高于820℃时,PtO_2会快速分解为Pt和O2。该研究结果对标准铂电阻温度计的制作技术和使用提供了理论支撑。Oxidation of high purity platinum wire is one of important factors that affect the temperature measurement performance of standard platinum resistance thermometer. The main reaction product of PtO2 at different temperatures and the formation and decomposition temperature of different products are researched using differential scanning calorimetry and X-ray photoelectron spectroscopy. The results show that PtO2 will decompose into Pt and PtO gradually as the temperature rise between 550 ℃ to 820 ℃. Above 820 ℃, PtO will decompose into Pt and O2 quickly. The results will provide supports for the production and use of standard platinum resistance thermometer.

关 键 词：计量学 铂电阻温度计 铂丝 氧化 分解 ITS-90 

分 类 号：TB942[一般工业技术—计量学]