Rheological properties of SiO2-CaO-MgO-Al2O3-(0-30 wt%)B2O3 system at basicity 1.4: Experiment and modelling

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F25%3A00637721" target="_blank" >RIV/67985858:_____/25:00637721 - isvavai.cz</a>

Alternative codes found

RIV/61989100:27350/25:10257753 RIV/61989100:27360/25:10257753 RIV/61989100:27640/25:10257753

Result on the web

<a href="https://hdl.handle.net/11104/0368540" target="_blank" >https://hdl.handle.net/11104/0368540</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ceramint.2025.03.307" target="_blank" >10.1016/j.ceramint.2025.03.307</a>

Result language

angličtina

Original language name

Rheological properties of SiO2-CaO-MgO-Al2O3-(0-30 wt%)B2O3 system at basicity 1.4: Experiment and modelling

Original language description

Boron oxide (B2O3) affects the viscosity and phase change temperatures of glasses and melts, which are widely used in various industrial processes. In this study, the effect of B2O3 in a wide concentration range (0-30 wt%) on the melting and rheological characteristics of the oxide system SiO2(37.7-25.2 wt%)-CaO(42.8-25.3 wt%)-MgO (10 wt%)-Al2O3(9.5 wt%)-B2O3(0-30 wt%) with a constant basicity of 1.4 was studied experimentally and theoretically. The experimental rheological data measured with a high-temperature rheometer up to 1550 degrees C were supported by the study of the internal structure by an X-ray powder diffraction analysis (XRPD), scanning electron microscopy with an energy-dispersive X-ray spectroscopy (SEM/EDX), a Fourier transform infrared spectroscopy (FTIR) and Raman microspectroscopy. The increase in the B2O3 content in the samples caused a dramatic decrease in the softening and liquidus temperatures. Up to 15 wt% B2O3 content, it was possible to determine the break temperature, which decreased with increasing B2O3 content. The exponential decrease in dynamic viscosity with an increasing temperature and its decrease with an increasing B2O3 content was caused by the decrease in the [BO4] tetrahedra coupled with an increase in the [BO3] units and boroxol rings, leading to a simplified structure with a higher number of non-bridging oxygens. Semiempirical models (Arrhenius, VFT, Riboud, Urbain, and Ray and Pal) were used to compare experimentally acquired dependencies with theoretically obtained ones. The dependence of dynamic viscosity over the temperature range of 1320-1520 degrees C and a B2O3 content 0-30 wt% was predicted with a relative error of 2.5 % using an artificial neural network (ANN). Unlike the empirical models, the ANN is a versatile statistical tool which can predict the dynamic viscosity of melts without assuming the physical nature of the processes.

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

10403 - Physical chemistry

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

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

Name of the periodical

Ceramics International

ISSN

0272-8842

e-ISSN

1873-3956

Volume of the periodical

51

Issue of the periodical within the volume

18

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

13

Pages from-to

26242-26254

UT code for WoS article

001532620800001

EID of the result in the Scopus database

2-s2.0-105000667332