Details

Autor(en) / Beteiligte

• Han, Jianjun
• Hong, Wei
• Jiang, Hong
• He, Jianxiong
• Wang, Qianchen
• Wang, Jing
• Gao, Wenkai

Titel

Crystallization Behavior and Kinetics of Lithium Aluminosilicate Glasses with Various Li2O Contents

Ist Teil von

• Journal of Wuhan University of Technology. Materials science edition, 2021-04, Vol.36 (2), p.243-247

Ort / Verlag

Wuhan: Wuhan University of Technology

Erscheinungsjahr

2021

Quelle

SpringerLink

Beschreibungen/Notizen

• The crystallization behavior of Li 2 O-Al 2 O 3 -SiO 2 glasses with various concentration of Li 2 O were investigated by DSC, XRD, and FE-SEM. The h/l-quartz s.s. is the main crystalline phase for all of the glass with the heat treatment of 720 °C/3 h+800°C/1.5 h while the crystallinity and crystal size increase with the increase of Li 2 O contents. Due to the negative thermal expansion coefficient of h/l-quartz s.s., the thermal expansion coefficient of glass-ceramics decreases with the increasing of Li 2 O contents. When the Li 2 O content is 9mol%, the near-zero CTE 20–700 °C = −0.09 × 10 −6 °C −1 is obtained upon the heat treatment of 720 °C/3 h+800 °C/1.5 h. The crystallization activation energy of the glass with 9mol% Li 2 O is about 351 kJ/mol, and the crystallization mechanism is volume crystallization.