Inorganic Materials ( IF 0.8 ) Pub Date : 2020-12-29 , DOI: 10.1134/s0020168520140149 P. V. Vashchenko , S. S. Boldova , V. A. Labusov
Abstract
The operating speed of commercially available spectral-ratio pyrometers and brightness pyrometers often appears insufficient for control of a fast-changing temperature (e.g., in a graphite cell of an AAS electrothermal atomizer, whose temperature increases at a rate of 104 °C/s). An advantage of spectral pyrometers is high speed and ability to measure the temperature of objects with unknown emissivity. The goal of this work is to develop a high-speed spectral pyrometer based on a Kolibri-2 spectrometer with a BLPP-2000 photodetector array that provides a working wavelength range of 400–1050 nm and a minimum basic exposure time of 0.4 ms. The temperature was calculated by plotting the emission spectrum of the object in Wien coordinates (with allowance for calibration of the spectral pyrometer using a radiation source of known temperature) and by measuring the slope angle of the obtained graph. The relative error of temperature measurements with a spectral pyrometer estimated by comparing the measurement results and the data obtained with a calibrated Termokont-TN5S1M single-channel pyrometer (Termokont company) was no more than 1.5% in a temperature range of 1000–2400°C and higher and the operating speed was up to 2500 measurements/s. The results of measuring the temperature of the graphite cell in the electrothermal atomizer using a spectral pyrometer during sample atomization at a rate of the temperature increase up to 10 000°C/s are presented.
中文翻译:
基于Kolibri-2光谱仪的高速光谱高温计
摘要
市售光谱比高温计和亮度高温计的运行速度通常似乎不足以控制快速变化的温度(例如,在AAS电热雾化器的石墨池中,其温度以10 4的速率升高)°C / s)。光谱高温计的一个优点是速度高,能够测量发射率未知的物体的温度。这项工作的目的是开发一种基于Kolibri-2光谱仪的高速光谱高温计,该光谱仪带有BLPP-2000光电探测器阵列,其工作波长范围为400–1050 nm,最小基本曝光时间为0.4 ms。通过在维恩坐标中绘制物体的发射光谱(允许使用已知温度的辐射源对光谱高温计进行校准)并测量所得曲线图的倾斜角来计算温度。通过比较测量结果和通过校准的Termokont-TN5S1M单通道高温计(Termokont公司)获得的数据估算的光谱高温计的温度测量相对误差在1000–2400°C的温度范围内不超过1.5%甚至更高,操作速度高达2500次测量/秒。给出了在样品雾化过程中使用光谱高温计以高达10000°C / s的升温速率测量电热雾化器中石墨电池温度的结果。