Laminated object manufacturing of LZSA glass‐ceramics

Abstract

Purpose This paper seeks to detail the fabrication of a glass‐ceramic substrate, based on the LiO 2 ‐ZrO 2 ‐SiO 2 ‐Al 2 O 3 (LZSA) system, by laminated object manufacturing (LOM) using water‐based cast tapes. Design/methodology/approach Small amounts of ZrSiO 4 were added to control the thermal expansion coefficient (TEC) of the original glass‐ceramic (LZSA5Zr: LZSA+5 wt% ZrSiO 4 ). 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% ZrSiO 4 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.