Detail publikace

Formation, Stability, and Crystallinity of Various Tricalcium Aluminate Polymorphs

RAVASZOVÁ, S. DVOŘÁK, K. BOHÁČ, M. VŠIANSKÝ, D. JANČÍKOVÁ, A.

Originální název

Formation, Stability, and Crystallinity of Various Tricalcium Aluminate Polymorphs

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

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.

Klíčová slova

tricalcium aluminate; polymorphism; cubic; orthorhombic; monoclinic; crystallite size

Autoři

RAVASZOVÁ, S.; DVOŘÁK, K.; BOHÁČ, M.; VŠIANSKÝ, D.; JANČÍKOVÁ, A.

Vydáno

3. 2. 2024

Nakladatel

MDPI

Místo

Switzerland

ISSN

1996-1944

Periodikum

Materials

Ročník

17

Číslo

3

Stát

Švýcarská konfederace

Strany od

1

Strany do

17

Strany počet

17

URL

https://www.mdpi.com/1996-1944/17/3/735

BibTex

@article{BUT187617,
  author="Simona {Ravaszová} and Karel {Dvořák} and Martin {Boháč} and Dalibor {Všianský} and Andrea {Jančíková}",
  title="Formation, Stability, and Crystallinity of Various Tricalcium Aluminate Polymorphs",
  journal="Materials",
  year="2024",
  volume="17",
  number="3",
  pages="17",
  doi="10.3390/ma17030735",
  issn="1996-1944",
  url="https://www.mdpi.com/1996-1944/17/3/735"
}