The Study Of Infrared Radiation Character And Zeta Potential Of Tourmaline

On the basis of consulting other study, the tourmaline's infrared absorption spectroscopyand infrared radiation character are studied systematically;also its Zeta potential is tested andstudied firstly in all its bearings.Our country has rich tourmaline resource. Except using as gems and scientific researchequipment parts, large numbers of tourmaline have not been developed and utilized, especiallythe black tourmaline. The tourmaline has characters for emitting far-infrared ray, releasingnegative ion, producing bioelectricity and containing numerous mineral substances and traceelements. The scientists and researchers are attaching importance to it more and more. It hasbeen used as a function material in environment, physical health and other fields in the homeand foreign country.What this thesis focuses is Dravite occurring in pegmatites from Hebei and Schorl fromXinjiang, in addition, Schorl from Inner Mongolia, Dravite occurring in metamorphic rocksfrom Hebei and Elbaite from Henan. These samples above that are tested and analyzed bymeans of electron probe and X-ray Diffraction are identified for species, combining withinfrared absorption spectroscopy at the same time.In the study of infrared radiation character, different species of tourmaline and Draviteoccurring in pegmatites from Hebei that are different in granularity and heattreatmenttemperature are chose for infrared radiation ratio testing. The result shows:The infraredradiation ratio of tourmaline powder is above 0.80 when the surrounding temperature is 20℃and the testing temperature is below 100℃;Schorl has a close infrared radiation ratio to Dravite,which is higher than Elbaite;No matter to Dravite or Schorl, as the content of ferric oxideincreases, the infrared radiation ratio decreases;tourmaline's size is smaller, its infraredradiation ratio is higher;after tourmaline is heat-treated under 800℃, its infrared radiation ratiodeclines;Dravite heat-treated at 800℃ has the highest infrared radiation ratio, 0.90;andDravite's structure suffers from destruction above 900℃ heattreatment, so its infrared radiationratio goes down. In this thesis, different wavelength range of the radiant point chose for testinghas impact on the infrared radiation ratio of tourmaline. By the testing result of the infraredradiation ratio of tourmaline combining with the analysis of infrared spectrum graph, it can beconcluded that the essence of tourmaline having high infrared radiation ratio consists in theexisting of many infrared active vibrant bonds, which is different from the conclusion drawn byYang Ruzeng, etc, "the crystal structure character and pyroelectricity effect of tourmaline are themain reason for its stronger infrared radiating".Tourmaline that has spontaneous polarizability, pyroelectricity and piezoelectricity can beused in many areas, for instance, electromagnetic shield, air purification, etc, therefore, differentspecies of tourmaline, Dravite occurring in pegmatites from Hebei that are different ingranularity and Schorl from Xinjiang that are different at heattreatment temperature and undercondition are tested accurately and studied in this thesis. The result shows: the tourmalinepowder particle in water is electronegative under neutral condition;the Elbaite powder hashigher Zeta potential than other species of tourmaline;the tourmaline size is smaller, its Zetapotential is higher, and its surface activity is stronger correspondingly;the tourmaline powderheat-treated under deoxidization condition has higher Zeta potential than that heat-treated underoxidation condition;and By calculation, the isoelectric point of tourmaline is in the range ofacidity, and the isoelectric point spot of Dravite is 5.38.The high infrared radiation ratio of tourmaline is the result of comprehensive factors. If thestrong microscopic property of tourmaline can be improved to adapt to complicatedenvironment, its application in environment and physical health will be brilliant.This study as a part of "Study of the tourmaline particulate's spontaneous polarizationmechanism and its environment decontamination function" receives the national natural sciencesustention.