Optimizing the microstructure, mechanical, and optical properties of recycled zirconia for dental applications

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

Ceramics International Pub Date : 2024-12-15 DOI:10.1016/j.ceramint.2024.10.137

Hui Yang , Kenta Yamanaka , Hao Yu , Juan Ramón Vanegas Sáenz , Guang Hong

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引用次数: 0

Abstract

Efficient recycling of dental zirconia residues from computer-aided design/manufacturing processes is crucial for sustainable development in dentistry. This study employed ball milling to modify recycled zirconia powder (RZP). Initial RZP and ball-milled RZP (RZP-BM) were pre-sintered at 1000–1150 °C and then final sintered at 1500 °C. Initial RZP had irregular shapes, while RZP-BM showed finer and more uniform morphology, higher packing density, and improved de-agglomeration after 6 h of ball milling. For pre-sintered zirconia, RZP-BM samples achieved properties comparable with commercial zirconia at 1100 °C, whereas initial RZP required 1150 °C. For final sintered zirconia, initial RZP samples exhibited lower Vickers microhardness, density, strength, and transmittance, with numerous defects in its microstructure. RZP-BM samples showed significant improvement in mechanical and optical properties, comparable with commercial zirconia. This study establishes a viable approach for recycling dental zirconia residues, enhancing its properties for potential reuse as dental materials.

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优化牙科应用中再生氧化锆的微观结构、机械和光学特性

有效回收利用计算机辅助设计/制造过程中产生的牙科氧化锆残渣对牙科的可持续发展至关重要。本研究采用球磨法对回收氧化锆粉末（RZP）进行改性。初始 RZP 和球磨 RZP（RZP-BM）在 1000-1150 °C 下预烧结，然后在 1500 °C 下最终烧结。初始 RZP 形状不规则，而 RZP-BM 经过 6 小时球磨后，形态更精细、更均匀，堆积密度更高，去团聚效果更好。对于预烧结氧化锆，RZP-BM 样品在 1100 ℃ 时的性能与商用氧化锆相当，而初始 RZP 需要 1150 ℃。对于最终烧结的氧化锆，初始 RZP 样品的维氏硬度、密度、强度和透射率都较低，其微观结构中存在许多缺陷。RZP-BM 样品在机械和光学性能方面有显著改善，可与商用氧化锆媲美。这项研究为回收牙科氧化锆残留物提供了一种可行的方法，提高了其性能，使其有可能作为牙科材料重新使用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.