Study of the High-Temperature Sintering Characteristics of Boron Oxide Composite Silicon-Based Ceramics

Study of the High-Temperature Sintering Characteristics of Boron Oxide Composite Silicon-Based Ceramics

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This paper explores the application of boron oxide (B2O3) as a sintering additive in silicon-based (SiO2) ceramics, focusing on its impact on the sintering process and resulting ceramic properties.Composite silicon-based ceramic shells with boron oxide content ranging from 0 to 4 Wt% were prepared using digital light processing (DLP) technology.This study examines the effects of boron oxide on sintering temperature, apparent porosity, shrinkage rates, and mechanical properties during high-temperature sintering.

Experimental results indicate that, as boron oxide esee rb3 content increases, the shrinkage rate of the ceramic samples rises progressively, with shrinkage in the XY direction increasing from 4.57% to 16.40% and in the Z direction from 6.

25% to 17.03%.Concurrently, the apparent porosity decreases with higher boron oxide content, ranging from a maximum of 36.

17% to a minimum of 23.27%.Bulk density also improves from 1.

49 g/cm3 to 1.78 g/cm3.The bending strength trend first rises and then declines, peaking at 15.

39 MPa at a boron oxide content of 3 Wt%.X-ray Diffraction and Energy Dispersive Spectroscopy analyses confirm that the addition of boron oxide promotes the formation of beta-quartz and that its liquid-phase behavior at high temperatures aids in enhancing ceramic densification.This study demonstrates that an appropriate amount of boron oxide can effectively medline guardian toilet safety rails lower the sintering temperature of silicon-based ceramics while improving their mechanical properties, providing a theoretical foundation and practical basis for broader industrial applications.