Formation, Stability, and Crystallinity of Various Tricalcium Aluminate Polymorphs

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26232511%3A_____%2F24%3AN0000008" target="_blank" >RIV/26232511:_____/24:N0000008 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216305:26110/24:PU150579 RIV/00216224:14310/24:00135795

Výsledek na webu

<a href="https://www.mdpi.com/1996-1944/17/3/735" target="_blank" >https://www.mdpi.com/1996-1944/17/3/735</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/ma17030735" target="_blank" >10.3390/ma17030735</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Formation, Stability, and Crystallinity of Various Tricalcium Aluminate Polymorphs

Popis výsledku v původním jazyce

Tricalcium aluminate is an important phase of Portland clinker. In this paper, three polymorphs of C3A were prepared by means of the solid-state synthesis method using intensive milling of the raw material mixture which was doped with various amounts of Na2O and sintered at a temperature of 1300 °C for 2 h. The final products were evaluated through X-ray diffraction using Rietveld analysis. The effect of the Na dopant content on the change in the crystalline structure of tricalcium aluminate was studied. It was proven that the given preparation procedure, which differed from other studies, was close to the real conditions of the formation of Portland clinker, and it was possible to prepare a mixture of different polymorphs of calcium aluminate. Fundamental changes in the crystal structure occurred in the range of 3–4% Na, when the cubic structure changes to orthorhombic. At a dosage of Na dopant above 4%, the orthorhombic structure changes to a monoclinic structure. There are no clearly defined boundaries for the existence of individual C3A phases; these phases arise at the same time and overlap each other in the areas of their formation at different Na doses.

Název v anglickém jazyce

Formation, Stability, and Crystallinity of Various Tricalcium Aluminate Polymorphs

Popis výsledku anglicky

Tricalcium aluminate is an important phase of Portland clinker. In this paper, three polymorphs of C3A were prepared by means of the solid-state synthesis method using intensive milling of the raw material mixture which was doped with various amounts of Na2O and sintered at a temperature of 1300 °C for 2 h. The final products were evaluated through X-ray diffraction using Rietveld analysis. The effect of the Na dopant content on the change in the crystalline structure of tricalcium aluminate was studied. It was proven that the given preparation procedure, which differed from other studies, was close to the real conditions of the formation of Portland clinker, and it was possible to prepare a mixture of different polymorphs of calcium aluminate. Fundamental changes in the crystal structure occurred in the range of 3–4% Na, when the cubic structure changes to orthorhombic. At a dosage of Na dopant above 4%, the orthorhombic structure changes to a monoclinic structure. There are no clearly defined boundaries for the existence of individual C3A phases; these phases arise at the same time and overlap each other in the areas of their formation at different Na doses.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

20100 - Civil engineering

Projekt

<a href="/cs/project/GA23-05122S" target="_blank" >GA23-05122S: Vliv kombinace tavidel, mineralizátorů a SCMs na vlastnosti nízkoenergetického slínku</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Materials

ISSN

1996-1944

e-ISSN

1996-1944

Svazek periodika

13

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

16

Strana od-do

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Kód UT WoS článku

001160261600001

EID výsledku v databázi Scopus

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