等离子熔融制备Li2O-SiO2透明微球微观结构与力学性能研究

doi:10.16552/j.cnki.issn1001-1625.2026.0198

硅酸盐通报 ›› 2026, Vol. 45 ›› Issue (9): 3289-3298.DOI: 10.16552/j.cnki.issn1001-1625.2026.0198

等离子熔融制备Li₂O-SiO₂透明微球微观结构与力学性能研究

温斌¹(), 张晗笑¹, 吴粤晟², 谢俊¹^,²^,³(), 张继红¹^,²^,³()

^1.武汉理工大学三亚科教创新园，三亚 572000
^2.武汉理工大学先进玻璃材料全国重点实验室，武汉 430070
^3.合浦县硅材料产业技术研究中心，北海 536100

收稿日期:2026-03-04 修订日期:2026-03-22 出版日期:2026-09-15 发布日期:2026-10-09
通信作者: 谢俊，博士，研究员。E-mail：xiejun2006@whut.edu.cn；
张继红，博士，研究员。E-mail：optinfo@whut.edu.cn
作者简介:温斌（1997—），男，硕士研究生。主要从事玻璃微球材料的研究。E-mail：281510516@qq.com
基金资助:
国家自然科学基金面上项目(52372033);广西科技重大专项(2024AA29026);国家重点研发计划(2024-1129-954-112)

Microstructure and Mechanical Properties of Transparent Li₂O-SiO₂ Microspheres Prepared by Plasma Melting

WEN Bin¹(), ZHANG Hanxiao¹, WU Yuesheng², XIE Jun¹^,²^,³(), ZHANG Jihong¹^,²^,³()

^1.Sanya Science and Education Innovation Park of Wuhan University of Technology，Sanya 572000，China
^2.National Key Laboratory for Advanced Glass Materials，Wuhan University of Technology，Wuhan 430070，China
^3.Hepu County Silicon Material Industry Technology Research Centre，Beihai 536100，China

Received:2026-03-04 Revised:2026-03-22 Published:2026-09-15 Online:2026-10-09

摘要/Abstract

摘要：

采用喷雾造粒结合等离子熔融球化工艺制备了不同组成的Li₂O-SiO₂透明微球，并对其微观组织、结构特征及力学性能进行了系统研究。结果表明，Li₂O-SiO₂体系球化后，随着Li₂O摩尔分数增加，微球结构从非晶态向晶态转变，硅氧网络结构逐渐解离，非桥氧比例增加，结构单元由高聚合态向低聚合态转变。力学性能测试显示，微球的维氏硬度和弹性模量与组成及结构密切相关，其中低Li₂O含量（33.3%，摩尔分数）的样品表现出较高的维氏硬度和弹性模量，最大维氏硬度为5.83 GPa，弹性模量为83.39 GPa。本研究为硅酸盐体系微球的组成设计和力学性能调控提供参考，所制备的微球具有潜在的应用价值。

关键词: 等离子球化, Li₂O-SiO₂体系, 透明微球, 微观结构, 维氏硬度, 弹性模量

Abstract:

In this study， Li₂O-SiO₂ transparent microspheres with different compositions were fabricated via a combined spray granulation and plasma melting spheroidization process. Their microstructure， structural characteristics， and mechanical properties were systematically investigated. The results indicate that， after spheroidization in the Li₂O-SiO₂ system， increasing the mole fraction of Li₂O induces a structural transformation from an amorphous to a crystalline state. Meanwhile， the silicate network gradually depolymerizes， the proportion of non-bridging oxygens increases， and the structural units evolve from highly polymerized to less polymerized configurations. Mechanical testing demonstrates that the Vickers hardness and elastic modulus of the microspheres are strongly dependent on composition and structure. Samples with lower Li₂O content （33.3%， mole fraction） exhibit higher hardness and modulus values， with a maximum Vickers hardness of 5.83 GPa and an elastic modulus of 83.39 GPa. This research provide a valuable reference for the composition design and mechanical performance control of silicate microspheres. The fabricated microspheres have potential applications in functional structural materials.

Key words: plasma spheroidization, Li₂O-SiO₂ system, transparent microsphere, microstructure, Vickers hardness, elastic modulus

中图分类号:

TQ171

温斌, 张晗笑, 吴粤晟, 谢俊, 张继红. 等离子熔融制备Li₂O-SiO₂透明微球微观结构与力学性能研究[J]. 硅酸盐通报, 2026, 45(9): 3289-3298.

WEN Bin, ZHANG Hanxiao, WU Yuesheng, XIE Jun, ZHANG Jihong. Microstructure and Mechanical Properties of Transparent Li₂O-SiO₂ Microspheres Prepared by Plasma Melting[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2026, 45(9): 3289-3298.

图/表 11

图1 Li2O-SiO2体系前驱体的SEM照片

Fig.1 SEM images of precursor of Li2O-SiO2 system

图2 Li2O-SiO2微球的SEM照片

Fig.2 SEM images of Li2O-SiO2 microspheres

图3 Li2O-SiO2微球的EDS照片

Fig.3 EDS images of Li2O-SiO2 microspheres

图4 Li2O-SiO2微球的超景深显微照片

Fig.4 Ultra-depth-of-field micrograph of Li2O-SiO2 microspheres

图5 Li2O-SiO2微球的粒径分布

Fig.5 Particle size distribution of Li2O-SiO2 microspheres

图6 Li2O-SiO2微球的XRD谱

Fig.6 XRD patterns of Li2O-SiO2 microspheres

图7 Li2O-SiO2微球的拉曼光谱

Fig.7 Raman spectra of Li2O-SiO2 microspheres

图8 Li2O-SiO2微球的FTIR谱

Fig.8 FTIR spectra of Li2O-SiO2 microspheres

图9 不同组分Li2O-SiO2微球的NMR谱

Fig.9 NMR spectra of Li2O-SiO2 microspheres with different compositions

表1 不同组分Li2O-SiO2微球中Q n 结构单元的相对含量（基于谱峰积分面积计算的数量占比）

Table 1 Relative fractions of Q n structural units in Li2O-SiO2 microspheres with different compositions （expressed as number fractions derived from integrated spectral peak areas）

Li₂O mole fraction/%	Relative fraction of Q ⁿ /%
Li₂O mole fraction/%	Q¹	Q²	Q³	Q⁴
33.3	0.48	2.71	75.54	21.27
35.7	1.31	7.50	64.29	26.90
40.0	28.61	36.30	17.65	17.44
45.5	20.88	59.51	6.45	13.16

图10 Li2O-SiO2微球的维氏硬度和弹性模量

Fig.10 Vickers hardness and elastic modulus in Li2O-SiO2 microspheres

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等离子熔融制备Li₂O-SiO₂透明微球微观结构与力学性能研究

Microstructure and Mechanical Properties of Transparent Li₂O-SiO₂ Microspheres Prepared by Plasma Melting

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