The dispersion characteristics of kaolin from the Zhuravlinyi Log deposit, as well as the ξ -potential and the apparent viscosity of suspensions based on it, were investigated. Kaolin suspensions had a sufficiently high stability due to the negative charge of the surface of the particles. The ξ-potential was determined as a function of pH and tripolyphosphate concentration by the electrophoresis method. The effectiveness of the additive on the apparent viscosity of the suspension is associated with the ability to increase the pH and hence the ξ -potential. The isoelectric point of kaolin is set to 3.28. The kaolin slurry had a fairly high casting rate, which can be explained by the good crystallization of the mineral (Hinckley index 1.76).
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This investigation was conducted using the resources of the Center for the Collective Use of Scientific Equipment of the ISUCT (with the support of the Ministry of Education and Science of Russia, agreement No. 075-15-2021-671).
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Translated from Steklo i Keramika, No. 2, pp. 48 – 52, February, 2023
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Filatova, N.V., Kosenko, N.F. & Morozova, I.V. Colloid-Chemical Properties of Suspensions of Kaolin from the Zhuravlinyi Log Deposit. Glass Ceram 80, 74–77 (2023). https://doi.org/10.1007/s10717-023-00559-9
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DOI: https://doi.org/10.1007/s10717-023-00559-9