<strong><i>β</i>-ZnS</strong>透明陶瓷的制备及相生成机理

doi:10.11901/1005.3093.2024.521

材料研究学报

2025, Vol. 39

Issue (12): 927-934 DOI: 10.11901/1005.3093.2024.521

研究论文

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β-ZnS透明陶瓷的制备及相生成机理

李泓霄, 李焕勇(

), 张炫

西北工业大学材料学院西安 710072

Preparation and Phase Formation Mechanism of β-ZnS Transparent Ceramics

LI Hongxiao, LI Huanyong(

), ZHANG Xuan

School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China

引用本文:

李泓霄, 李焕勇, 张炫. β-ZnS透明陶瓷的制备及相生成机理[J]. 材料研究学报, 2025, 39(12): 927-934.
Hongxiao LI, Huanyong LI, Xuan ZHANG. Preparation and Phase Formation Mechanism of β-ZnS Transparent Ceramics[J]. Chinese Journal of Materials Research, 2025, 39(12): 927-934.

全文: PDF(6701 KB) HTML

摘要:

用化学均相沉淀法合成出纳米β-ZnS粉体，以碱金属卤化物KX (X = Br、I、Cl)为添加剂，在830 ℃/30 MPa条件下将其热压制备不含非透明六方相的β-ZnS透明陶瓷并表征其相组成、微观形貌、成分分布和光致发光，研究了β-ZnS透明陶瓷的相生成机理。结果表明，KBr、KI烧结助剂形成的液相能促进β-ZnS晶粒的长大，还能抑制β-ZnS纳米粉体的尺寸诱导低温相变，避免六方α-ZnS相的形成；KCl能促进α-ZnS生成而不利于透明陶瓷的生成。根据实验结果以及Br^-、I^-和Cl^-的离子半径提出了KX抑制β-ZnS纳米粉体发生低温相变的机理。

关键词 ：无机非金属材料, ZnS透明陶瓷, 热压烧结, 低温相变, 烧结助剂

Abstract：

ZnS transparent ceramics with free wurtzite phase α-ZnS were successfully prepared through hot-pressing sintering by 30 MPa at 830 ^oC, using the as-synthesized β-ZnS nanopowders and KX (X = Br, I, Cl) as raw material. It was found that halides KX, as the additives, play the crucial role in the sintering process of ZnS transparent ceramics. Both halides KBr and KI not only promote the rapid growth of grain by generating a liquid phase, but also effectively inhibit the size-induced low-temperature phase transition of the nanopowder cubic phase β-ZnS to the hexagonal one. However, KCl promotes the formation of α-ZnS with an adverse impact on ZnS transparent ceramics. A mechanism of alkali metal halides KX inhibiting the size-induced low-temperature phase transition of ZnS nanoparticles was rationally proposed by combining X-ray diffraction results, microstructure, composition distribution and photoluminescence spectra of ZnS ceramics with the ionic radii of Br^-, I^-, and Cl^-.

Key words： inorganic non-metallic materials ZnS transparent ceramics hot-press sintering low-temperature phase transition sintering additive

收稿日期: 2024-12-31

ZTFLH:

TB321

基金资助:国家自然科学基金(51572220);陕西省自然科学基础研究计划(2021JM-057)

通讯作者: 李焕勇，副教授，lihuanyong@nwpu.edu.cn，研究方向为光学透明陶瓷材料

Corresponding author: LI Huanyong, Tel: 13572263608, E-mail: lihuanyong@nwpu.edu.cn

作者简介: 李泓霄，男，2000年生，硕士生

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https://www.cjmr.org/CN/10.11901/1005.3093.2024.521 或 https://www.cjmr.org/CN/Y2025/V39/I12/927

图1 ZnS纳米粉体的XRD谱和SEM照片

图2 添加不同量、不同KX (X = Br、I、Cl)的ZnS透明陶瓷的XRD谱

图3 添加不同量、不同KX (X = Br、I、Cl)制备的ZnS透明陶瓷的微观形貌

图4 KBr抑制纳米β-ZnS低温相变机理的示意图

图5 紫外光(365 nm)激发ZnS陶瓷的光致发光谱

图6 ZnS透明陶瓷(~1.0 mm)的红外透过光谱

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