Barium Neodymium Titanium Borate Glass‐Based High k Dielectrics
A nonconventional high k glass based on
which is combined with typical fillers of BaO· Nd2 O3· TiO2· B2 O3 and Al2 O3 , 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 BaTiO3 .
The BaTi(BO3)2 filler did not seem to be directly involved in the crystallization process as only non Al2 O3 ‐containing crystalline phases, such as Al 3,
NdBO and Nd2 Ti4 O11, were observed. On the contrary,
the BaNd2 Ti5 O14, filler resulted in the crystallization of two phases, BaTiO3 and BaTi(BO3)2 .
As an example of a promising dielectric candidate, a composite sample consisting of the glass and 30 wt% Al2O3 exhibited k ~ 22 and tan δ ~ 0.009 with nearly full densification at 850°C.
BaNd2 Ti5 O14
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Document Type: Research Article
Publication date: April 1, 2012