Related Experiment Video
Updated: May 6, 2026
Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
Published on: June 7, 2018
[Study on high-temperature phase change of tobermorite]
Xiu-Li Yang1, Xiao-Yu Cui, Chong Cui
1School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China. jkyxl@126.com
High-temperature heating of tobermorite causes dehydration and dehydroxylation, transforming its structure into stable wollastonite at 1000°C. This phase change involves structural collapse and recrystallization.
Area of Science:
- Materials Science
- Mineralogy
- Geochemistry
Context:
- Tobermorite is a calcium silicate hydrate (CSH) mineral crucial in cementitious materials.
- Understanding its thermal stability is vital for high-temperature applications and geological processes.
Purpose:
- To investigate the high-temperature phase transformation of pure tobermorite using thermal analysis and spectroscopy.
- To elucidate the structural changes and intermediate phases during heating.
Summary:
- Heating tobermorite to 300°C resulted in the loss of interlayer water (dehydration).
- Dehydroxylation and structural collapse occurred around 724°C, leading to an amorphous phase.
- Recrystallization to wollastonite began at 861°C, forming a stable 2M-wollastonite structure by 1000°C.
Impact:
- Provides a detailed understanding of tobermorite's thermal decomposition pathway.
- Informs the use of tobermorite-based materials in high-temperature environments.
- Contributes to the knowledge of phase transitions in silicate minerals.
More Related Videos
08:00Chemical Synthesis of Porous Barium Titanate Thin Film and Thermal Stabilization of Ferroelectric Phase by Porosity-Induced Strain
Published on: March 27, 2018
04:09Demonstrating the Simplicity and In Situ Temperature Monitoring of the Mechanochemical Synthesis of Metal Chalcogenides Suitable for Thermoelectrics
Published on: August 30, 2024
Related Concept Videos
02:39Phase Transitions: Melting and Freezing
01:19Phase Changes
A substance melts or freezes at a temperature called its melting point and boils or condenses at its boiling point. These temperatures depend on pressure. High pressure favors the denser form of the substance, so typically, high pressure...