(INVITED)Effects of LiF sintering additive on the microstructure and mechanical properties of hot-pressed CaF2 transparent ceramics

Zuodong Liu; Qilong Shen; Songchang Fu; Litao Yang; Xue Chen; Siya Li; Yue Cao; Bing Liu; Yongsheng Yu; Qiangshan Jing; Peng Liu

Optical Materials: X (May 2022)

(INVITED)Effects of LiF sintering additive on the microstructure and mechanical properties of hot-pressed CaF2 transparent ceramics

Zuodong Liu,
Qilong Shen,
Songchang Fu,
Litao Yang,
Xue Chen,
Siya Li,
Yue Cao,
Bing Liu,
Yongsheng Yu,
Qiangshan Jing,
Peng Liu

Affiliations

Zuodong Liu: Corresponding author.; Henan Key Laboratory of Utilization of Non-metallic Mineral in the South of Henan, Xinyang Normal University, Xinyang, 464000, China
Qilong Shen: Henan Key Laboratory of Utilization of Non-metallic Mineral in the South of Henan, Xinyang Normal University, Xinyang, 464000, China
Songchang Fu: Henan Key Laboratory of Utilization of Non-metallic Mineral in the South of Henan, Xinyang Normal University, Xinyang, 464000, China
Litao Yang: Henan Key Laboratory of Utilization of Non-metallic Mineral in the South of Henan, Xinyang Normal University, Xinyang, 464000, China
Xue Chen: Henan Key Laboratory of Utilization of Non-metallic Mineral in the South of Henan, Xinyang Normal University, Xinyang, 464000, China
Siya Li: Henan Key Laboratory of Utilization of Non-metallic Mineral in the South of Henan, Xinyang Normal University, Xinyang, 464000, China
Yue Cao: Henan Key Laboratory of Utilization of Non-metallic Mineral in the South of Henan, Xinyang Normal University, Xinyang, 464000, China
Bing Liu: Henan Key Laboratory of Utilization of Non-metallic Mineral in the South of Henan, Xinyang Normal University, Xinyang, 464000, China
Yongsheng Yu: Henan Key Laboratory of Utilization of Non-metallic Mineral in the South of Henan, Xinyang Normal University, Xinyang, 464000, China
Qiangshan Jing: Henan Key Laboratory of Utilization of Non-metallic Mineral in the South of Henan, Xinyang Normal University, Xinyang, 464000, China
Peng Liu: Corresponding author.; Henan Key Laboratory of Utilization of Non-metallic Mineral in the South of Henan, Xinyang Normal University, Xinyang, 464000, China

Journal volume & issue: Vol. 14
p. 100147

Abstract

Read online

CaF2 raw powders were synthesized by the chemical precipitation technique, and CaF2 ceramics with LiF sintering additives were fabricated by the hot-pressing (HP) sintering technique. The effects of LiF sintering additives on the optical transparency, microstructure and microhardness of CaF2 ceramics were investigated. The CaF2 ceramic with 0.05 wt% LiF exhibiting the best transparency, and the transmittance at 500 nm and 1800 nm are 71.5% and 87.8%, respectively. The average grain size of CaF2 ceramics increases with rising the amount of LiF from 0 to 1 wt%, while, the Vickers hardness (Hv) decreases. The average grain size, Hv, and fracture toughness (KIC) for the CaF2 ceramic with 0.05 wt% LiF are 85.6 ± 6.2 μm, 2.24 ± 0.06 GPa, and 0.11 ± 0.02 MPa m1/2, respectively.

Published in Optical Materials: X

ISSN: 2590-1478 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Engineering (General). Civil engineering (General): Applied optics. Photonics; Science: Physics: Optics. Light
Website: https://www.journals.elsevier.com/optical-materials-x

About the journal

Abstract

Keywords