The effect of TiO2/Yb2O3 binary sintering aids on the properties of UV‐cured Al2O3‐based ceramics

IF 1.8 4区材料科学 Q2 MATERIALS SCIENCE, CERAMICS

International Journal of Applied Ceramic Technology Pub Date : 2024-07-19 DOI:10.1111/ijac.14861

Xinyu Miao, Shuangyu Liu, Ping Lu, Hongtao Chu, Fulong Zhang, Chuanjin Huang, Liyan Wang

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Abstract

In this study, an Al2O3‐based ceramic pastes with high solid content and low viscosity for photocuring was prepared. The effects of TiO2/Yb2O3 binary sintering aid on the rheological properties, curing behavior, and bending strength of the sintered parts were systematically investigated. Ceramic samples with an intact surface and no defects were prepared through debinding in various atmospheres followed by pressure‐less sintering at 1600°C. The bending strength of the sintered material was 329 MPa, which represents a 231% increase compared to the bending strength of 99.4 MPa for pure Al2O3 ceramic material prepared using the same process, with the highest recorded bending strength reaching 478.47 MPa. Scanning electron microscopy and X‐ray diffraction analyses revealed that the binary sintering aid acts as a bridge between grains by forming a solid solution with Al2O3 powder at high temperatures, which decreased the pore size and number between Al2O3 ceramic grains, thereby enhancing the bending strength of the ceramics. The prepared ceramic pastes is expected to meet the manufacturing requirements of high‐performance ceramic substrates and accelerate the development of high‐performance ceramic substrate processing technology.

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TiO2/Yb2O3 二元烧结助剂对紫外固化 Al2O3 基陶瓷性能的影响

本研究制备了一种高固含量、低粘度的 Al2O3 基光固化陶瓷浆料。系统研究了 TiO2/Yb2O3 二元烧结助剂对烧结部件流变特性、固化行为和弯曲强度的影响。通过在不同气氛中脱脂，然后在 1600°C 下进行无压烧结，制备出了表面完整且无缺陷的陶瓷样品。烧结材料的抗弯强度为 329 兆帕，与采用相同工艺制备的纯 Al2O3 陶瓷材料的抗弯强度 99.4 兆帕相比，提高了 231%，最高抗弯强度达到 478.47 兆帕。扫描电子显微镜和 X 射线衍射分析表明，二元烧结助剂通过在高温下与 Al2O3 粉末形成固溶体，在晶粒之间起到桥梁作用，从而减小了 Al2O3 陶瓷晶粒之间的孔径和孔数，从而提高了陶瓷的抗弯强度。制备的陶瓷浆料有望满足高性能陶瓷基底的制造要求，并加速高性能陶瓷基底加工技术的发展。

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来源期刊

International Journal of Applied Ceramic Technology 工程技术-材料科学：硅酸盐

CiteScore

3.90

自引率

9.50%

发文量

280

审稿时长

4.5 months

期刊介绍： The International Journal of Applied Ceramic Technology publishes cutting edge applied research and development work focused on commercialization of engineered ceramics, products and processes. The publication also explores the barriers to commercialization, design and testing, environmental health issues, international standardization activities, databases, and cost models. Designed to get high quality information to end-users quickly, the peer process is led by an editorial board of experts from industry, government, and universities. Each issue focuses on a high-interest, high-impact topic plus includes a range of papers detailing applications of ceramics. Papers on all aspects of applied ceramics are welcome including those in the following areas: Nanotechnology applications; Ceramic Armor; Ceramic and Technology for Energy Applications (e.g., Fuel Cells, Batteries, Solar, Thermoelectric, and HT Superconductors); Ceramic Matrix Composites; Functional Materials; Thermal and Environmental Barrier Coatings; Bioceramic Applications; Green Manufacturing; Ceramic Processing; Glass Technology; Fiber optics; Ceramics in Environmental Applications; Ceramics in Electronic, Photonic and Magnetic Applications;