Insight into the physicochemical aspects of kaolins with different morphologies
Source abstract
Abstract
The physicochemical aspects of four soft kaolins were investigated using X-ray diffraction (XRD), scanning electronic microscopy (SEM), transmission electron microscopy (TEM), Fourier transformation infrared spectroscopy (FTIR), differential scanning calorimetry-thermogravimetry (DSC-TG) specific surface area and surface zeta potential measurements. The correlation between degree of crystal order, thermal stability, morphology and surface characteristics of the kaolinites were examined and discussed. The endothermic peak temperatures, in particular, showed a clear positive correlation with the calculated crystallinity index of the kaolinites. The physicochemical characteristics of a natural kaolinite rod were considered in greater detail. Rod-like kaolinite had lower degree of order and zeta potential (pH < 3) than the platy kaolinites but was more ordered than expected for halloysite, and did not show a distinct central void. A schematic morphology for the proposed arrangement of curved kaolinite layers making up the rods is presented.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Clay minerals and soil interactions · Soil and Unsaturated Flow · Iron oxide chemistry and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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