Preparation and Performance Optimization of Fe2+:ZnSe Solid Solution by High-Pressure–High-Temperature Method

Lijuan Wang ¹

Haohao Yang ^{2, 3}

Shiyun Zheng ^{2, 3}

Xin Fan ³

Qiong Gao ¹

Fangbiao Wang ³

Qi Chen ²

Peng Liu ⁴

Linjun Li ¹

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Key Laboratory of Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, China |

College of Physics and Electronic Engineering, Qujing Normal University, Qujing 655011, China |

Key Laboratory of New Carbon-Based Functional and Super-Hard Materials of Heilongjiang Province, School of Physics and Electronic Engineering, Mudanjiang Normal University, Mudanjiang 157011, China |

⁴

Jiangsu Key Laboratory of Advanced Laser Materials and Devices, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China |

Publication type: Journal Article

Publication date: 2025-02-19

MDPI

Journal: Materials

scimago Q2

SJR: 0.565

CiteScore: 5.8

Impact factor: 3.1

ISSN: 19961944

DOI: 10.3390/ma18040896

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Abstract

In this paper, high-purity zinc selenide (ZnSe) prepared by the Chemical Vapor Deposition (CVD) method was used as the raw material, and iron ion-doped zinc selenide polycrystals were successfully fabricated through the thermal diffusion method at 1100 °C for 30 h. The results showed that iron ions (Fe2+) successfully penetrated into the zinc selenide crystals, but the concentration of iron ions inside the crystals was relatively low, and the crystals exhibited numerous defects. To address this issue, we performed secondary sintering and annealing on the samples under high-temperature and high-pressure (HPHT) conditions, with the annealing temperature range set at 900–1200 °C. The results demonstrated that, under the synergistic effects of high temperature and high pressure, the lattice spacing in the crystals significantly decreased, defects were reduced, the distribution of iron ions became more uniform, and the concentration of iron ions in the central region increased. Additionally, the density and hardness of the samples were significantly improved. The method of secondary sintering under high-temperature and high-pressure provides a novel approach for the preparation of iron ion-doped zinc selenide polycrystalline ceramics, contributing to the enhancement of ceramic properties.