A Study of Cordierite Ceramics Synthesis From domestic kaolin

This work aims to study the effect of chlorine ion on the formation of the cordierite phase (2MgO.2Al2O3.5SiO2) from domestic kaolin at various calcined temperatures.. The cordierite phase was synthesized by a solid-state reaction technique from the mixture of kaolin, aluminum nitrate nonahydrate (Al(NO3)3.9H2O), and magnesium chloride hexahydrate (MgCl2.6H2O) which was designed to the stoichiometric composition of cordierite in the absence and presence of chlorine ion (NH4Cl). The structure and formation of cordierite phase were characterized by X-ray diffraction (XRD) and thermogravimetric - differential thermal analysis (TG-DSC). Phase composition of samples calcined at various temperatures was calculated by using Match! (Version 3.7.0) software. It is noteworthy that the presence of chlorine ion in the mixture declined the formation temperature of cordierite by 50 °C. The cordierite phase was calculated to be 61.3 wt.% and 5.5 wt.% at 1150 °C for the present and absent chlorine ion, respectively. The presence of chlorine ion affected the cordierite formation rate and suppressed the temperature of formation. Cordierite phase could be obtained up to 89.6 wt.% at 1250 °C and 30 wt.% NH4Cl. This investigation found that cordierite ceramic could be synthesized from domestic kaolin at lower temperature by using NH4Cl additive.

The effect of chlorine, and alcohol on SARS-CoV-2

Coronavirus disease COVID-19 pandemic has imposed a reality that requires us to protect ourselves from infection, especially as the disease is highly infectious and has no specific treatment. Disinfectants are one of the most important ways to prevent the virus, specifically chlorine and alcohol-based hand sensitizers. This study aims to discuss the efficacy of both alcohol disinfectants and chlorine on the Coronavirus, and that discussion led us to the conclusion that both have an effective role in killing the virus in close proportion if used in the required circumstances and in the right way. Alcohol can also be used to make hand rubs, because of its short duration of action, and reduced side effects. Chlorine can be used to disinfect many types of surfaces and facilities due to its dangerous adverse effects on humans.