Far Infrared Emission and Portable Testing Device of Fine Powders

Abstract

In order for industrial and mining enterprises to fast detect the quality of fine mineral powders with far infrared emission, a simple testing model was set up according to the relationship between the emission intensity of powders and their surface temperature. The corresponding testing device was designed and assembled into three parts containing Constant Temperature Heating Part, Temperature Measuring Part and Sample Loading Part. By using the tourmaline mineral powders with far infrared emission as the research object and combining Fourier transform infrared spectroscopy, the calibration for the testing device was carried out. The results showed that the far infrared emission intensity of the tourmaline powders with different mining area and particle size could be judged. The testing results exhibited correct values when compared with those from FTIR measurements.

Testing Method of Infrared Emissivity Used in Powders Industry

“…Where [2] , σ is Boltzmann constant:σ = 5.67 x 10 -8 w / (m 2 , k 4 ). k 1 and k 2 are proportional constant related to the coefficient of thermal conductivity-λ, the coefficient of heat convection-h , the bottom surface temperature of powders-T and the environment temperature-T e.…”

“…However, the method of FTIR to test infrared emissivity of powder materials was limited in widely use, because the device was expensive, bulky and tedious. Liang [2] etc designed a portable infrared emission performance testing devices of powder materials basing on the principle of heat transfer. The final surface temperature of two standard samples and a test sample were tested separately.…”

Effect of Heat Treatment on the Far-Infrared Emission Spectra and Fine Structures of Black Tourmaline

“…Ceramics prepared by tourmaline powders have been used widely in the fields of environmental protection, health care and energy saving. [1][2][3][4][5] It is reported that the thermal behavior and performance of tourmaline play a significant role in the biological activity of the ceramics during the sintering process. Numerous corresponding studies have been carried out.…”