Premium
Low‐Loss Microwave Dielectric Material Based on Magnesium Titanate
Author(s) -
Shih ChuanFeng,
Li WeiMin,
Tung KuoShin,
Hsu WenDong
Publication year - 2010
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.1551-2916.2010.03790.x
Subject(s) - sintering , materials science , calcination , titanate , ceramic , microwave , dielectric loss , magnesium , ilmenite , mineralogy , loss factor , dielectric , metallurgy , optoelectronics , chemistry , telecommunications , catalysis , computer science , biochemistry
Low‐loss ilmenite magnesium titanate was synthesized from TiO 2 and MgO powders prepared separately from chemical solutions. Both of these starting materials were very fine and had a high specific area. MgTiO 3 ceramic had a high quality factor ( Q × f ) of ∼186 000 GHz when reactive sintering (calcination free) was adopted at 1400°C for 4 h. Moreover, a very high Q × f value of 368 000 GHz (at 10 GHz) was observed when classical solid‐state sintering, in which the sintering temperature was as low as 1300°C for 4 h, was applied. The possible mechanism that caused the variation in Q × f values for samples prepared by different sintering processes and initial powders were presented. The proposed low‐loss MgTiO 3 is very promising for microwave or millimeter‐wave applications.