Optical Determination of Thermodynamic Temperatures from a C2H2 Line-Doublet in the Near Infrared

2019 ◽  
Vol 11 (6) ◽  
Author(s):  
Antonio Castrillo ◽  
Eugenio Fasci ◽  
Hemanth Dinesan ◽  
Stefania Gravina ◽  
Luigi Moretti ◽  
...  
Keyword(s):  
Near Infrared ◽  
Optical Determination ◽  
Thermodynamic Temperatures

In Situ Optical Determination of Fraction Solid of Al-Si-Mg Alloys

2006 ◽  
Vol 508 ◽  
pp. 491-496 ◽  
Author(s):  
Sonja Steinbach ◽  
Lorenz Ratke
Keyword(s):  
Near Infrared ◽  
Silica Aerogels ◽  
Optical Technique ◽  
Lever Rule ◽  
Time Profiles ◽  
Fraction Solid ◽  
Optically Transparent ◽  
Optical Determination

In this paper we report on a new optical technique to measure in situ the fraction solid during solidification. The technique utilizes the extreme properties of silica aerogels, being optically transparent in the visible and near infrared. From measured brightness time profiles the fraction solid can be derived using a suitable theoretical approach. The technique is tested on a technical AlSiMg alloy (A357) solidified directionally in the furnace facility Artemis. The results are compared with the well known theoretical expressions of the lever rule and the Scheil relation. The measured fraction solid as a function of temperature agrees well with model of Scheil which shows the capabilities of the new technique.

Near Infrared Spectroscopy Used in Purification and Determination of Pharmaceutical Cocrystal

2013 ◽  
Vol 41 (12) ◽  
pp. 1928
Author(s):  
Zong-Liang CHI ◽  
Miao-Miao WANG ◽  
Xiao-Dong CONG ◽  
Shao-Guang LIU ◽  
Bao-Chang CAI
Keyword(s):  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Pharmaceutical Cocrystal
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