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Barium Neodymium Titanium Borate Glass‐Based High k Dielectrics
Author(s) -
Lee Seung Min,
Jo Yeon Hwa,
Kim Hyo Eun,
Mohanty Bhaskar C.,
Cho Yong Soo
Publication year - 2012
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.1551-2916.2011.04966.x
Subject(s) - dielectric , materials science , crystallization , titanium , barium , barium borate , barium titanate , mineralogy , high κ dielectric , boron , composite number , composite material , dielectric loss , analytical chemistry (journal) , chemical engineering , metallurgy , chemistry , optoelectronics , organic chemistry , chromatography , engineering
A nonconventional high k glass based on BaO · Nd 2 O 3 · TiO 2 · B 2 O 3 , which is combined with typical fillers of Al 2 O 3 and BaTiO 3 , has been investigated for the purpose of generating potential k (dielectric constant) ~20 and k ~ 40 dielectric materials as a result of densification at 850°C. Crystallization, densification, and dielectric properties depended strongly on the type and content of the fillers. Glass itself was crystallized mainly with BaTi(BO 3 ) 2 . The Al 2 O 3 filler did not seem to be directly involved in the crystallization process as only non Al ‐containing crystalline phases, such as NdBO 3 , Nd 2 Ti 4 O 11 , and BaNd 2 Ti 5 O 14 , were observed. On the contrary, the BaTiO 3 filler resulted in the crystallization of two phases, BaTi(BO 3 ) 2 and BaNd 2 Ti 5 O 14 . As an example of a promising dielectric candidate, a composite sample consisting of the glass and 30 wt% Al 2 O 3 exhibited k ~ 22 and tan δ ~ 0.009 with nearly full densification at 850°C.