Laminated object manufacturing of LZSA glass-ceramics

作者：Gomes Cynthia; Travitzky Nahum; Greil Peter; Acchar Wilson; Birolis Hansu; Novaes de Oliveira Antonio Pedro; Hotza Dachamir^*

来源：Rapid Prototyping Journal, 2011, 17(6): 424-428.

DOI：10.1108/13552541111184152

• Ceramics and glass
• Thermal expansion
• Dielectric properties
• Laminated object manufacturing

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 degrees C for 30 min and crystallized at either 800 or 850 degrees C for 30 min.
Findings - LZSA laminates (sintered and crystallized at 700 and 800 degrees C, respectively) exhibited a relative density of similar to 90 percent, a dielectric constant of 8.39, a dielectric loss tangent of 0.031 and TEC of 5.5 x 10(-6) K(-1) (25-550 degrees C). The addition of 5 wt% ZrSiO(4) to original LZSA glass-ceramics led to a nearly constant TEC value of 6 x 10(-6) K(-1) throughout the whole temperature interval (25-800 degrees 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.

• 出版日期2011