Study on prestressed coating reinforced magnesia porcelain

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.2024.09.426

Yuhui Wang , Yueming Li , Yi Sun , Kai Li , Xiaona Zhang , Hongbing Wei , Yuanyuan Huang , Jia He , Detian Wan , Yiwang Bao

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Abstract

The current study aimed at the preparation of high strength magnesia porcelain. In this study, a coating basic formula of natural ceramic materials of Longyan kaolin (41.94 wt%), burnt talc (52.68 wt%) and Al₂O₃ (5.38 wt%) were used. In addition, right amount of potassium feldspar and ZnO were added to adjust the coating properties. High strength magnesia porcelain was obtained by the difference of thermal expansion coefficient between coating and substrate. The study focused on the changes in the cross-sectional area ratio and thermal expansion coefficient between the coating and matrix, as well as the effect of adding potassium feldspar and ZnO on the flexural strength of ceramics. Following the addition of 4 wt% ZnO and 13 wt% potassium feldspar, the results indicated a thermal expansion coefficient difference of 3.25 × 10⁻⁶/°C and a cross-sectional area ratio of approximately 54.40. The resulting composite ceramics sintered at 1220 °C for 60 min had their flexural strength reached 237.09 ± 26.70 MPa, which was 56.53 % higher than the matrix's flexural strength of 151.70 ± 5.32 MPa. Additionally, a study of the composite ceramics' resistance to thermal shock showed an increase in the critical temperature of decrease in flexural strength from 200 °C to 220 °C.

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预应力涂层增强菱镁瓷研究

本研究旨在制备高强度镁质瓷。本研究采用了龙岩高岭土（41.94 wt%）、烧滑石（52.68 wt%）和 Al2O3（5.38 wt%）等天然陶瓷材料的涂层基本配方。此外，还添加了适量的钾长石和氧化锌，以调整涂层性能。通过涂层和基底之间的热膨胀系数差，获得了高强度的菱镁瓷。研究的重点是涂层与基体之间的横截面积比和热膨胀系数的变化，以及添加钾长石和氧化锌对陶瓷抗折强度的影响。在添加 4 wt% 的氧化锌和 13 wt% 的钾长石后，结果显示热膨胀系数差为 3.25 × 10-6/°C，截面积比约为 54.40。所得复合陶瓷在 1220 °C 下烧结 60 分钟，其抗弯强度达到 237.09 ± 26.70 兆帕，比基体的抗弯强度（151.70 ± 5.32 兆帕）高出 56.53%。此外，对复合陶瓷抗热震性的研究表明，抗折强度下降的临界温度从 200 °C 上升到 220 °C。

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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.