Laminated object manufacturing of LZSA glass‐ceramics

Abstract

Purpose

This paper seeks to detail the fabrication of a glass‐ceramic substrate, based on the LiO₂‐ZrO₂‐SiO₂‐Al₂O₃ (LZSA) system, by laminated object manufacturing (LOM) using water‐based cast tapes.

Design/methodology/approach

Small amounts of ZrSiO₄ were added to control the thermal expansion coefficient (TEC) of the original glass‐ceramic (LZSA5Zr: LZSA+5 wt% ZrSiO₄). In order to verify the influence of the amount and nature of crystalline phases on the thermal and dielectric behavior of the material, LZSA and LZSA5Zr laminates were sintered at 700°C for 30 min and crystallized at either 800 or 850°C for 30 min.

Findings

LZSA laminates (sintered and crystallized at 700 and 800°C, respectively) exhibited a relative density of ∼90 percent, a dielectric constant of 8.39, a dielectric loss tangent of 0.031 and TEC of 5.5×10⁻⁶ K⁻¹ (25‐550°C). The addition of 5 wt% ZrSiO₄ to original LZSA glass‐ceramics led to a nearly constant TEC value of 6×10⁻⁶ K⁻¹ throughout the whole temperature interval (25‐800°C). Dielectric properties of LZSA5Zr did not show any remarkable change when compared to original LZSA.

Originality/value

The thermal, mechanical and electrical properties of LZSA glass‐ceramic laminates fabricated by LOM makes them potential candidates for substrate applications.

Citation

Gomes, C., Travitzky, N., Greil, P., Acchar, W., Birol, H., Pedro Novaes de Oliveira, A. and Hotza, D. (2011), "Laminated object manufacturing of LZSA glass‐ceramics", Rapid Prototyping Journal, Vol. 17 No. 6, pp. 424-428. https://doi.org/10.1108/13552541111184152