Barium neodymium titanium borate glass-based high k dielectrics

Seung Min Lee, Yeon Hwa Jo, Hyo Eun Kim, Bhaskar C. Mohanty, Yong Soo Cho

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

A nonconventional high k glass based on BaO·Nd 2O 3·-TiO 2·B 2O 3, which is combined with typical fillers of Al 2O 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 2O 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 2Ti 4O 11, and BaNd 2Ti 5O 14, were observed. On the contrary, the BaTiO 3 filler resulted in the crystallization of two phases, BaTi(BO 3) 2 and BaNd 2Ti 5O 14. As an example of a promising dielectric candidate, a composite sample consisting of the glass and 30 wt% Al 2O 3 exhibited k ∼ 22 and tan δ ∼ 0.009 with nearly full densification at 850°C.

Original languageEnglish
Pages (from-to)1356-1359
Number of pages4
JournalJournal of the American Ceramic Society
Volume95
Issue number4
DOIs
Publication statusPublished - 2012 Apr

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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