Abstract
Three kaolinite samples applied for paper coating were collected from America (KA), Brazil (KB), and China (KC), respectively. Parameters such as average bond length of Si-O and Al-O (l(Si-O) and l(Al-O)), tetrahedral rotation angles (α), changes of tetrahedral flattening angles (τ) and octahedral flattening angles (ψ) comparative to ideal angle, particle layer thickness (T) and basal z corrugation (Δz) were analyzed by XRD and Rietveld method. The experimental results indicated that Δz KA > Δz KC > Δz KB. KB has a regular structure and KA has a disorder structure, αKA > αKC > αKB, ΔτKA > ΔτKC > ΔτKB, and ΔψKA> ΔψKB >ΔψKC. KA has unstable tetrahedron and octahedron. KB and KC have stable tetrahedron and octahedron, respectively. In the process of manufacture, kaolinite structure may be broken from places with unstable tetrahedron and octahedron. l(Si-O)KA > l(Si-O)KB > l(Si-O)KC and l(Al-O)KA > l(Al-O)KC > l(Al-O)KB. What only considered is the effect of bond length, KA may be most easily broken in the manufacture. Compared with bond lengths of KA and KB, Si-O, and Al-O of KB and KC may be easily broken, respectively. T KA < T KC < T KB. KB should be delaminated to finer particles, or it would hinder its dispersibility.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
More From: Journal of Wuhan University of Technology-Mater. Sci. Ed.
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.