A new
spectral-emittance method to modify RGB pyrometry is developed
for the surface temperature measurements of dispersed chars in a Hencken
flat-flame burner. Nikon D300s, with calibrated spectral response,
was used as the detector for the measurement. First, we calculated
an original lookup table for ratio–temperature of the camera
on the basis of the blackbody assumption. Second, 420/440 two-color
pyrometry using an intensified charge-coupled device (ICCD) combined
with two adjacent bandpass filters centered at 420 and 440 nm was
adopted here for a verified comparison to RGB pyrometry. On the basis
of the normalized spectral emission distribution of char particles
in the visible light region (390–710 nm) acquired by an Ocean2000
spectrometer, a calibrated normalized spectral emissivity model of
burning chars was built. Then, the lookup table of the Nikon camera
was further modified by this calibrated spectral emissivity model,
enabling better predictions on char particle temperatures in cases
of all different ambient conditions. The measurement deviation can
be effectively reduced from 4.2 to 1.7% under ∼1800 K, from
9.5 to 2.2% under ∼2200 K, and from 8.8 to 0.9% under ∼2300
K.
It is vital to improve rate capability and cycling performance of Sb2S3 to promote its application in lithium-ion batteries. Herein, Sb2S3 is successfully anchored inside carbon nanotube-in-nanotube via a multi-step...
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