Low-temperature sintered Ba16ZrNb12O48-BaWO4 composite ceramics with near-zero τf and enhanced Q×f for LTCC applications
Perovskite-structured ceramics are promising for their tunable properties, while LTCC technology requires low sintering temperatures and near-zero τ f . BaCu(B4O8) as a sintering aid reduced Ba16ZrNb12O48’s sintering temperature from 1450 ℃ to 1000 ℃. A two-phase strategy designed (1 − x )Ba16ZrNb12...
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| Main Authors: | , , , , , , , , , , , |
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| Format: | Article |
| Language: | en |
| Published: |
Elsevier
2025
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/122496/1/122496.pdf http://psasir.upm.edu.my/id/eprint/122496/ https://linkinghub.elsevier.com/retrieve/pii/S0955221925008751 |
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| Summary: | Perovskite-structured ceramics are promising for their tunable properties, while LTCC technology requires low sintering temperatures and near-zero τ f . BaCu(B4O8) as a sintering aid reduced Ba16ZrNb12O48’s sintering temperature from 1450 ℃ to 1000 ℃. A two-phase strategy designed (1 − x )Ba16ZrNb12O48- x BaWO4 + 5 wt% BaCu(B4O8) ( x = 0.88–0.93) ceramics for τ f modulation. Ba16ZrNb12O48 with 5 wt% BaCu(B4O8) densified at 1000 ℃, yielding ε r = 32.6, Q×f = 22,400 GHz, τ f = +44.2 ppm/℃, and ρ bulk = 5.83 g/cm3. Notably, x = 0.92 with 5 wt% BaCu(B4O8), co-fired at 950 ℃ and annealed, achieved τ f = +7.4 ppm/℃ (near-zero), Q×f = 29,100 GHz, and ε r = 20.0. XRD/SEM-EDS confirmed chemical inertness and no Cu diffusion at the ceramic/electrode interface. These features make it a promising LTCC candidate. |
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