In situ boro-mullite phase formation in Glass–Ceramic glazes: Anatase–rutile phase transformations and microstructure properties

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

Ceramics International Pub Date : 2024-09-30 DOI:10.1016/j.ceramint.2024.09.411

Fahriye Taşkıran , Yasemen Kalpaklı

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引用次数: 0

Abstract

‘‘Boro-mullite’’ is the name for mullites produced through the synthesis of boron-rich material and playing a critical role in producing high-performance materials. Also, the stability of the anatase phase in the glaze and against temperature has been addressed and improved by many studies. In situ boro-mullite crystals generated using various glass-ceramic glaze compositions that contain TiO₂ and their impact on the transformation of anatase into a rutile phase were examined in this study. Additionally, the samples' water absorption, bulk density, apparent porosity and shrinkage, Vickers hardness, and optical properties were evaluated at various Al₂O₃ and B₂O₃ amounts at 700 °C, 800 °C, 900 °C, 1000 °C and 1100 °C. X-ray diffraction analysis revealed that as the temperature and Al₂O₃ ratio rose, it triggered the boro-mullite phase formation. On the other hand, increasing the Al₂O₃ ratio led to a rise in the samples' sintering temperature and delayed the anatase to rutile phase transformation. Furthermore, the presence of corundum crystals retarded the anatase crystal size growth during the remodelling process of the conversion of anatase to rutile. While the increase in the B₂O₃ ratio sharpened the peaks of albite crystals, the formation of rutile crystals accelerated with the increase in temperature and caused inhibition of albite formation. The albite phase's presence facilitated the creation of the liquid phase and achieved the 0.010 % water absorption and 0 % apparent porosity values as well the highest bulk density and microhardness with 2.476 g/cm3 and 550 H V. The yellowness (+b∗) values were found to be the highest at 1100 °C where the rutile crystals reached their maximum size. The anatase-rutile conversion is postponed and the increase in the yellowness value is prevented by the glaze's formation of boro-mullite. FESEM-EDS analysis showed that the temperature was the driving force in the transformation of acicular boro-mullite crystal into highly acicular prismatic needle crystal and spherical anatase crystals into the rod shape rutile.

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玻璃陶瓷釉中的原位硼莫来石相形成：阳起石-金刚石相变和微观结构特性

''硼莫来石''是通过合成富硼材料生产的莫来石的名称，在生产高性能材料中发挥着重要作用。此外，锐钛矿相在釉中的稳定性和耐温性也得到了许多研究的关注和改善。本研究考察了使用含有 TiO2 的各种玻璃陶瓷釉料成分生成的原位硼莫来石晶体及其对锐钛矿转变为金红石相的影响。此外，还在 700 ℃、800 ℃、900 ℃、1000 ℃ 和 1100 ℃条件下，评估了不同 Al2O3 和 B2O3 含量下样品的吸水性、体积密度、表观孔隙率和收缩率、维氏硬度和光学特性。X 射线衍射分析表明，随着温度和 Al2O3 比例的升高，会引发波罗莫来石相的形成。另一方面，增加 Al2O3 比率会导致样品烧结温度升高，并延迟锐钛矿相向金红石相的转变。此外，在锐钛矿转化为金红石的重塑过程中，刚玉晶体的存在会延缓锐钛矿晶体尺寸的增长。虽然 B2O3 比率的增加会使白榴石晶体的峰值变尖，但金红石晶体的形成会随着温度的升高而加速，并导致白榴石的形成受到抑制。白云石相的存在促进了液相的形成，使吸水率达到 0.010 %，表观孔隙率达到 0 %，体积密度和显微硬度最高，分别为 2.476 g/cm3 和 550 H V。锐钛矿-金红石的转化被推迟，釉料中形成的溴莫来石阻止了黄度值的增加。FESEM-EDS 分析表明，温度是针状莫来石晶体转变为高度针状棱形针晶和球形锐钛矿晶体转变为棒状金红石的驱动力。

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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.