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High-Hardness Transparent Silicon Nitride Ceramic

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Abstract:

In this study, high-hardness transparent silicon nitride was fabricated using liquid-phase sintering. Powders were prepared by adding sintering additives in various ratios, followed by dry pressing at 200 MPa to obtain a circular green body. After forming the green body in the previous process, low-pressure liquid-phase sintering was performed at 1900 °C and 0.7 MPa under a nitrogen atmosphere to produce transparent silicon nitride. According to the test results, the material exhibited a density of 3.148 g/cm³, a Vickers hardness (HV10) of 2100, and a transmittance of 38.5% at a wavelength of 750 nm.

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Periodical:

Materials Science Forum (Volume 1179)

Pages:

53-59

DOI:

https://doi.org/10.4028/p-U8lxb1

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Online since:

March 2026

Authors:

Hsueh Ping Weng*, Kai Hsiang Chuang, Ming Hui Chang, Kuo Chuang Chiu

Keywords:

High Hardness, Low-Pressure Liquid-Phase Sintering, Silicon Nitride

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© 2026 Trans Tech Publications Ltd. All Rights Reserved

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