Near infrared absorption coefficient of molten glass by emission spectroscopy

A novel photoacoustic spectroscopy telemetry method of detecting trace acetylene gas using a quartz tuning fork is reported. A 1532-nm CW-DFB, fiber-coupled diode laser with power of 12 mW was used as the excitation source while an astronomical telescope was used to collect laser light scattered on the surface of the detected object at a distance of 6 m and the photoacoustic spectroscopy of acetylene was performed. The detection results are consistent with the standard near-infrared absorption coefficient of acetylene. This study provides a new direction for research in photoacoustic spectroscopy telemetry. Future work will quantitatively analyze acetylene gas.

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Oxygen defect-induced small polaron transfer for controlling the near-infrared absorption coefficient of hexagonal cesium tungsten bronze nanocrystals

Ceramics International ◽

10.1016/j.ceramint.2021.11.250 ◽

2021 ◽

Author(s):

Boxu Shen ◽

Yuanhao Wang ◽

Lin Lu ◽

Hongxing Yang

Keyword(s):

Absorption Coefficient ◽

Infrared Absorption ◽

Near Infrared ◽

Small Polaron ◽

Tungsten Bronze ◽

Oxygen Defect

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Temperature Imaging of Water Around a Small Heated Sphere Using a Near-Infrared Absorption Technique

Proceedings of the 15th International Heat Transfer Conference ◽

10.1615/ihtc15.min.008855 ◽

2014 ◽

Author(s):

Naoto Kakuta ◽

Kenta Yamada ◽

Ryota Fujioka ◽

Katsuya Kondo ◽

Hidenobu Arimoto ◽

...

Keyword(s):

Infrared Absorption ◽

Near Infrared ◽

Temperature Imaging ◽

Absorption Technique

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Study on the Near-infrared Absorption Properties of ZnGeP2 Single Crystals

Journal of Inorganic Materials ◽

10.3724/sp.j.1077.2010.01029 ◽

2010 ◽

Vol 25 (10) ◽

pp. 1029-1033

Author(s):

Shi-Xing XIA ◽

Chun-Hui YANG ◽

Chong-Qiang ZHU ◽

Tian-Hui MA ◽

Meng WANG ◽

...

Keyword(s):

Single Crystals ◽

Infrared Absorption ◽

Near Infrared ◽

Absorption Properties

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Pyrrole-bridged quinones: π-electronic systems that modulate electronic structures by tautomerism and deprotonation

Chemical Communications ◽

10.1039/d1cc02691g ◽

2021 ◽

Author(s):

Shinya Sugiura ◽

Hiromitsu Maeda

Keyword(s):

Infrared Absorption ◽

Electronic Structures ◽

Near Infrared ◽

Ion Pairing ◽

Anion Binding ◽

Electronic Systems

A new series of π-extended quinone derivatives containing a pyrrole bridge exhibited NH/OH-type tautomerization and anion binding along with deprotonation that induced near-infrared absorption and ion-pairing assemblies.

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Characterization and mapping of hematite ore mineral classes using hyperspectral remote sensing technique: a case study from Bailadila iron ore mining region

SN Applied Sciences ◽

10.1007/s42452-021-04213-3 ◽

2021 ◽

Vol 3 (2) ◽

Author(s):

Ibrahim Shaik ◽

S. K. Begum ◽

P. V. Nagamani ◽

Narayan Kayet

Keyword(s):

Infrared Absorption ◽

Near Infrared ◽

Spectral Feature ◽

Absorption Feature ◽

X Ray ◽

Remote Sensing Technique ◽

Ore Minerals ◽

Feature Fitting ◽

Hematite Ore

AbstractThe study demonstrates a methodology for mapping various hematite ore classes based on their reflectance and absorption spectra, using Hyperion satellite imagery. Substantial validation is carried out, using the spectral feature fitting technique, with the field spectra measured over the Bailadila hill range in Chhattisgarh State in India. The results of the study showed a good correlation between the concentration of iron oxide with the depth of the near-infrared absorption feature (R2 = 0.843) and the width of the near-infrared absorption feature (R2 = 0.812) through different empirical models, with a root-mean-square error (RMSE) between < 0.317 and < 0.409. The overall accuracy of the study is 88.2% with a Kappa coefficient value of 0.81. Geochemical analysis and X-ray fluorescence (XRF) of field ore samples are performed to ensure different classes of hematite ore minerals. Results showed a high content of Fe > 60 wt% in most of the hematite ore samples, except banded hematite quartzite (BHQ) (< 47 wt%).

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