Microwave dielectric in the Sm(Co1/2Ti1/2)O3–CaTiO3 ceramic system with near-zero temperature coefficient with resonant frequency

Hsu, Cheng‐Hsing; Ho, Hsuan-An

doi:10.1016/j.matlet.2009.11.028

Cited by 31 publications

(4 citation statements)

References 7 publications

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“…It is observed that the permittivity increases with increase in TiO 2 contents. In general, the permittivity significantly depends on the percentage densification and secondary phases at microwave frequencies for the composite ceramics . As mentioned above, all the samples have dense microstructure.…”

Section: Resultsmentioning

confidence: 97%

“…It clearly reveals that the saturation of Q × f value occurs at the range of 1.5–2.5 wt% TiO 2 at 875°C, and at the range of 2.5–3.5 wt% TiO 2 at 900°C, respectively. As we know, there are several factors that contribute to the Q × f values at microwave frequencies, such as density (or porosity), secondary phases, and grain boundaries in real homogeneous ceramics . At 900°C, the densification has little influence on the Q × f values because of the dense microstructure (Fig.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Silver Co‐Firable Li₂ZnTi₃O₈ Microwave Dielectric Ceramics with LZB Glass Additive and TiO₂ Dopant

Chen

Hou

Bao

et al. 2012

Int J Applied Ceramic Tech

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New dielectric ceramics are prepared by the conventional solid-state ceramic route. Effects of LZB glass on sintering, phase purity, microstructure, and dielectric properties of Li 2 ZnTi 3 O 8 ceramics have been investigated. Adding LZB lowers sintering temperature from 1050°C to 875°C, and does not induce much degradation of dielectric properties. The 1.0 wt% LZB glass-added ceramic has better properties of e r = 23.9, Q 9 f = 31,608 GHz, τ f = À14.3 ppm/°C. Additions of TiO 2 markedly improve microwave properties. Typically, the Li 2 ZnTi 3 O 8 + 1 wt%LZB + 3.5 wt%TiO 2 sintered at 900°C shows e r = 26.1, Q 9 f = 45,168 GHz, τ f = À4.1 ppm/°C. Compatibility with Ag electrode indicates that this material may be applied to LTCC devices.

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

Silver Co‐Firable Li₂ZnTi₃O₈ Microwave Dielectric Ceramics with LZB Glass Additive and TiO₂ Dopant

Chen

Hou

Bao

et al. 2012

Int J Applied Ceramic Tech

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“…16) Recently, several researchers have been attempting to improve the dielectric properties of this compound, such as by partial replacement of the B-site and the selection of a compensator in the ceramic systems. [17][18][19][20][21][22][23] As mentioned earlier, the influence of microwave dielectric properties on the Zr 4+ substitutions in the Ti-sites in the CaLa 4 Ti 4 O 15 materials has also been investigated. With a sintering temperature of 1550 °C for 4 h, a dielectric constant (ε r ) of 46, a high Q × f value of 47,500 GHz, and a τ f of −9.5 ppm=°C were achieved for CaLa 4 (Zr 0.05 Ti 0.95 ) 4 O 15 ceramics.…”

Section: Introductionmentioning

confidence: 99%

Properties of CaLa₄(Zr_0.05Ti_0.95)₄O₁₅ thin films by RF magnetron sputtering

Hsu

Liu

Tseng

et al. 2016

Jpn. J. Appl. Phys.

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CaLa4(Zr0.05Ti0.95)4O15 thin films deposited on n-type Si(100) substrates at different substrate temperatures and radio-frequency (RF) powers were investigated. The structural and morphological characteristics analyzed by X-ray diffraction (XRD), atomic force microscopy (AFM), and scanning electron microscopy (SEM) were found to be affected by substrate temperature (150–300 °C) and RF power (200–300 W). Highly oriented CaLa4(Zr0.05Ti0.95)4O15 (110) perpendicular to the substrate surface was identified for all of the deposition conditions. The XRD showed that the deposited films exhibited a polycrystalline microstructure. As the RF power and substrate temperature increased, the quality of the CaLa4(Zr0.05Ti0.95)4O15 thin films improved, and the kinetic energies of the sputtered atoms increased, resulting in a structural improvement of the deposited CaLa4(Zr0.05Ti0.95)4O15 thin films. The optimum conditions for the growth of CaLa4(Zr0.05Ti0.95)4O15 thin films in this study were a RF power of 300 W and substrate temperature of 300 °C. A high dielectric constant of 46.2 (f = 1 MHz), dissipation factor of 0.049 (f = 1 MHz) and a low leakage current density of 7.3 × 10−7 A/cm2 in an electrical field of 100 kV/cm were obtained for the prepared films.

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“…(Ca 0.2 Sr 0.8 ) 3 Ti 2 O 7 ceramics have the dielectric constant of 58, Qf of 27,000 (GHz) and  f of 359 ppm/ o C [5]. Several investigations have been made to improve the dielectric properties, such as the partial replacement of B-site and selection of a compensator in the ceramic systems [6,7]. Tseng et al reported that Zr substitution effectively improved the microwave dielectric properties of MgTiO 3 ceramics [8].…”

Section: Introductionmentioning

confidence: 99%

Microwave Dielectric Properties of (Ca_0.2Sr_0.8)₃(Zr_0.1Ti_0.9)₂O₇ Ceramics

Chen

Hsu

Tung

2014

Proceedings of the 12th Asia Pacific Physics Conference (APPC12)

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Ca 0.2 Sr 0.8) 3 (Zr 0.1 Ti 0.9) 2 O 7 ceramic prepared by the solid state method was investigated for its microstructure and microwave dielectric properties. The Q×f values of 8000-11,000 GHz and the dielectric constant values (ε r) of 64.4-72.3 can be obtained when the sintering temperatures are in the range of 1460-1550 o C. The ε r value of 72.3, the Q×f value of 11000 GHz were obtained for (Ca 0.2 Sr 0.8) 3 (Zr 0.1 Ti 0.9) 2 O 7 ceramics sintering at 1520 o C for 2h. (Ca 0.2 Sr 0.8) 3 (Zr 0.1 Ti 0.9) 2 O 7 is proposed as a suitable material candidate for application in microwave ceramic resonator. KEYWORDS: (Ca 0.2 Sr 0.8) 3 (Zr 0.1 Ti 0.9) 2 O 7 ceramics, microwave dielectric properties

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Microwave dielectric in the Sm(Co1/2Ti1/2)O3–CaTiO3 ceramic system with near-zero temperature coefficient with resonant frequency

Cited by 31 publications

References 7 publications

Silver Co‐Firable Li₂ZnTi₃O₈ Microwave Dielectric Ceramics with LZB Glass Additive and TiO₂ Dopant

Silver Co‐Firable Li₂ZnTi₃O₈ Microwave Dielectric Ceramics with LZB Glass Additive and TiO₂ Dopant

Properties of CaLa₄(Zr_0.05Ti_0.95)₄O₁₅ thin films by RF magnetron sputtering

Microwave Dielectric Properties of (Ca_0.2Sr_0.8)₃(Zr_0.1Ti_0.9)₂O₇ Ceramics

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Microwave dielectric in the Sm(Co1/2Ti1/2)O3–CaTiO3 ceramic system with near-zero temperature coefficient with resonant frequency

Cited by 31 publications

References 7 publications

Silver Co‐Firable Li2ZnTi3O8 Microwave Dielectric Ceramics with LZB Glass Additive and TiO2 Dopant

Silver Co‐Firable Li2ZnTi3O8 Microwave Dielectric Ceramics with LZB Glass Additive and TiO2 Dopant

Properties of CaLa4(Zr0.05Ti0.95)4O15 thin films by RF magnetron sputtering

Microwave Dielectric Properties of (Ca0.2Sr0.8)3(Zr0.1Ti0.9)2O7 Ceramics

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Product

Resources

About

Silver Co‐Firable Li₂ZnTi₃O₈ Microwave Dielectric Ceramics with LZB Glass Additive and TiO₂ Dopant

Silver Co‐Firable Li₂ZnTi₃O₈ Microwave Dielectric Ceramics with LZB Glass Additive and TiO₂ Dopant

Properties of CaLa₄(Zr_0.05Ti_0.95)₄O₁₅ thin films by RF magnetron sputtering

Microwave Dielectric Properties of (Ca_0.2Sr_0.8)₃(Zr_0.1Ti_0.9)₂O₇ Ceramics