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

Kód výsledku v 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>

Nalezeny alternativní kódy

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

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Ceramics International

ISSN

0272-8842

e-ISSN

1873-3956

Svazek periodika

51

Číslo periodika v rámci svazku

18

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

13

Strana od-do

26242-26254

Kód UT WoS článku

001532620800001

EID výsledku v databázi Scopus

2-s2.0-105000667332