Study on Gas-Liquid Inclusions in Quartz Sand under Microwave Field

摘要

The impurities and gas-liquid inclusions in quartz sand,which are from our country and UNIMIN Corporation respectively,were analyzed by Inductive Coupling Plasma Emission Spectrograph (ICP-AES) and Fourier Transform Infrared Spectroscopy (FT-IR).The results showed that the biggest difference between them was the content of gas-liquid inclusions.Thus,in order to improve the quality of our country high purity quartz sand,development of new technology to remove gas-liquid inclusions has been imperative.Method for removal of gas-liquid inclusions,using microwave radiation,was studied in this project.Meanwhile,the change of microscopic morphology of gas-liquid inclusion was observed by polarizing microscope.And the change of water content in gas-liquid inclusion was investigated by Fourier Transform Infrared Spectroscopy.Our results showed that micro-crack could be produced on the surface of gas-liquid inclusion under microwave treatment.The results also showed that new water molecules and liquid inclusions could be generated in the process.Furthermore,these liquid inclusions could be removed and H2O could be reduced by HF acid leaching.