Preparation and optimization of silicon nitride slurries for digital light processing

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

International Journal of Applied Ceramic Technology Pub Date : 2024-08-18 DOI:10.1111/ijac.14888

Qi Sha, Jianjun Xie, Yesen Duan, Wenyu Tang, Jingxian Zhang

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Abstract

Digital light processing (DLP) three‐dimensional printing has the advantages of both high printing resolution and efficiency and has been used to manufacture high‐precision, small, and complex shaped ceramic parts. One of the challenges of DLP is to develop photosensitive ceramic slurries with high solid content and low viscosity, especially for non‐oxide ceramics such as silicon nitride due to the dispersion and light absorption problem. This study mainly explores the dispersibility of silicon nitride in ultraviolet (UV)‐cured resins and the photocured properties of the slurry. Rheological measurements were utilized to characterize and screen different dispersants in the resin. It was found that DISPERMP is an effective dispersant. In order to improve the curing depth of Si3N4 photosensitive paste, the surface of silicon nitride powder was treated by oxidation, and organic compounds with different refractive indices were also introduced to increase the light penetration depth. It was found that glycerol with a refractive index of 1.474 resulted in the greatest improvement in the curing depth of Si3N4 photosensitive paste. Finally, a proposed slurry composition was developed to successfully print silicon nitride ceramics through UV‐curing molding technology.

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制备和优化用于数字光处理的氮化硅浆料

数字光处理（DLP）三维打印具有打印分辨率高和效率高的优点，已被用于制造高精度、小型和形状复杂的陶瓷部件。DLP 面临的挑战之一是开发高固含量、低粘度的光敏陶瓷浆料，尤其是氮化硅等非氧化物陶瓷浆料的分散和光吸收问题。本研究主要探讨氮化硅在紫外线（UV）固化树脂中的分散性以及浆料的光固化特性。流变学测量被用来表征和筛选树脂中的不同分散剂。结果发现，DISPERMP 是一种有效的分散剂。为了提高 Si3N4 感光浆料的固化深度，对氮化硅粉末表面进行了氧化处理，并引入了不同折射率的有机化合物，以增加光的穿透深度。结果发现，折射率为 1.474 的甘油对 Si3N4 感光浆料固化深度的改善最大。最后，研制出了一种拟议的浆料成分，可通过紫外线固化成型技术成功打印氮化硅陶瓷。

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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;