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Synthesis of High Density and Transparent Forsterite Ceramics Using Nano‐Sized Precursors and Their Dielectric Properties
Author(s) -
Sano Satoru,
Saito Noriko,
Matsuda Shinichi,
Ohashi Naoki,
Haneda Hajime,
Arita You,
Takemoto Minoru
Publication year - 2006
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2005.00766.x
Subject(s) - forsterite , calcination , sintering , materials science , ceramic , dielectric , chemical engineering , mineralogy , particle size , composite material , chemistry , organic chemistry , catalysis , optoelectronics , engineering
Forsterite (Mg 2 SiO 4 ) ceramics were prepared using Mg(OH) 2 and SiO 2 as precursors, and the effect of powder characteristics of Mg(OH) 2 on calcination and sintering was investigated. The use of highly dispersed Mg(OH) 2 powder (HD powder) resulted in a lower calcination temperature. Forsterite powder of high homogeneity and small particle size prepared from the HD powder enabled synthesis of high‐density forsterite ceramics by ordinary sintering without applying external pressure. Moreover, transparent forsterite ceramics were successfully synthesized through addition of excess Mg to the precursors to compensate for Mg evaporated during the sintering process. Subsequent dielectric measurements revealed that the transparent forsterite ceramics had a very low dielectric loss (tan δ<10 −4 ).