New empirical rheological model for ceramics suspensions based on a hyperbolic sine formulation

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26310%2F26%3A0200211" target="_blank" >RIV/00216305:26310/26:0200211 - isvavai.cz</a>

Result on the web

<a href="https://ceramics.onlinelibrary.wiley.com/doi/10.1111/jace.70504" target="_blank" >https://ceramics.onlinelibrary.wiley.com/doi/10.1111/jace.70504</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/jace.70504" target="_blank" >10.1111/jace.70504</a>

Result language

angličtina

Original language name

New empirical rheological model for ceramics suspensions based on a hyperbolic sine formulation

Original language description

Understanding the rheological behavior of ceramic suspensions is crucial for optimizing shaping technologies, including slip casting, injection molding, and additive manufacturing. Classical models often fail to account for temperature effects, interfacial phenomena, and nonlinear concentration effects, thereby limiting their applicability to real processing conditions. This study introduces a new empirical rheological model based on a hyperbolic sine formulation, incorporating three physically interpretable parameters: the effective Einstein limit offset (A), the mixing viscosity factor (beta), and the interaction viscosity factor (C), verified in the concentration range 0-40 vol.%. Unlike conventional viscosity-concentration relationships, the proposed model captures the first measurable deviation from the dilute Einstein regime and describes the progressive nonlinear rise of relative viscosity using a compact analytical expression. The parameter beta captures the effects of interfacial tension, liquid viscosity, and effective particle number density under isothermal conditions, as confirmed by its temperature and shear-dependent decrease and by its reduction in dispersant-stabilized suspensions, where steric layers diminish particle interactions. Therefore, parameter beta provides a physically grounded link between the suspension structure and its rheological response. The model demonstrates excellent agreement with experimental data, outperforming five established rheological models across multiple systems and measurement conditions. These findings highlight the novelty of the proposed formulation as both a flexible fitting tool and a physically meaningful descriptor of early-stage viscosity evolution.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20504 - Ceramics

Project

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Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2026

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of the American Ceramic Society

ISSN

0002-7820

e-ISSN

1551-2916

Volume of the periodical

109

Issue of the periodical within the volume

1

Country of publishing house

US - UNITED STATES

Number of pages

12

Pages from-to

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UT code for WoS article

001653159800001

EID of the result in the Scopus database

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