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Microwave Dielectric Properties and Chemical Resistance of Low‐Temperature‐Sintered CaZrB 2 O 6 Ceramics
Author(s) -
Kim Hyo Tae,
Nam MyoungHwa,
Kim JongHee,
Nahm Sahn
Publication year - 2009
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/j.1744-7402.2009.02381.x
Subject(s) - materials science , sintering , ceramic , dielectric , microwave , boron , chemical resistance , analytical chemistry (journal) , chemical engineering , mineralogy , composite material , organic chemistry , chemistry , physics , optoelectronics , quantum mechanics , engineering
Dolomite‐type borate ceramics consisting of CaZrB 2 O 6 were synthesized via a conventional solid‐state reaction route; low‐temperature sintering was explored using Bi 2 O 3 –CuO additives of 1–7 wt% for low‐temperature co‐fired ceramics applications. For several sintering temperatures, the microwave dielectric properties and chemical resistance of the ceramics were investigated. The CaZrB 2 O 6 ceramics with 3 wt% Bi 2 O 3 –CuO addition could be sintered below 925°C, and the microwave dielectric properties of the low‐temperature samples were ɛ r =10.55, Q × f =87,350 GHz, and τ f =+2 ppm/°C. The chemical resistance test result showed that both CaZrB 2 O 6 ‐ and Bi 2 O 3 –CuO‐added CaZrB 2 O 6 ceramics were durable in basic solution but were degraded in acid solution.