Optimizing damage resistance and structural evolution in CaO-modified Li2O-Al2O3-B2O3-TiO2-P2O5 glass-ceramics

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2024-10-01 DOI:10.1016/j.ceramint.2024.09.408

Sijia Hu , Kun Zhou , Zuzhi Huang , Hao Zhang , Hailei Xie , Feng He , Shuwang Duo , Jiang Shi

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Abstract

Aluminoborate glass, recognized for its remarkable crack resistance, presents significant potential as a cover material for portable electronic devices. Nevertheless, its relatively low hardness has been a limiting factor. This study synthesized a series of 11 Li₂O-30 Al₂O₃-(55-x) B₂O₃-2 TiO₂-2 P₂O₅-xCaO (wt%), with x varying from 0 to 10, employing the melt-cast method. The resultant glass-ceramics were produced via heat treatment at 590 °C for 2 h, followed by a systematic examination of their structural and mechanical properties. The investigation demonstrated that an increase in CaO content diminishes crystallization and induces a morphological transition in the crystalline phases from granular and short rod-like structures to lath-like formations, which subsequently impacts the coordination environment of Al and B atoms. With a CaO content of 2 %, the GC2 sample precipitated Li(Al₇B₄O₁₇) and Li₂AlB₅O₁₀ phases, achieving a compressive strength (CR) value of 15.0 N, a hardness of 7.51 GPa, and a fracture toughness of 1.50 MPa m^0.5. This glass-ceramic exhibited optimal scratch resistance and visible light transmittance exceeding 85 %, underscoring its considerable promise for application as smartphone cover glass due to its impressive overall damage resistance.

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优化 CaO 改性 Li2O-Al2O3-B2O3-TiO2-P2O5 玻璃陶瓷的抗破坏性和结构演化

铝硼酸盐玻璃因其卓越的抗裂性而被公认为是一种非常有潜力的便携式电子设备盖板材料。然而，其相对较低的硬度一直是一个限制因素。本研究采用熔铸法合成了一系列 11 Li2O-30 Al2O3-(55-x) B2O3-2 TiO2-2 P2O5-xCaO（重量百分比），x 在 0 到 10 之间变化。在 590 °C 下热处理 2 小时后，生产出玻璃陶瓷，随后对其结构和机械性能进行了系统检测。研究表明，CaO 含量的增加会降低结晶度，并导致结晶相从颗粒状和短杆状结构向板状结构的形态转变，进而影响铝原子和硼原子的配位环境。在 CaO 含量为 2% 的情况下，GC2 样品析出了 Li(Al7B4O17) 和 Li2AlB5O10 相，抗压强度 (CR) 值达到 15.0 N，硬度达到 7.51 GPa，断裂韧性达到 1.50 MPa m0.5。这种玻璃陶瓷表现出最佳的抗划伤性，可见光透射率超过 85%，由于其出色的整体抗破坏性，有望用作智能手机的盖板玻璃。

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来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.