Uniaxial viscosity of low-temperature cofired ceramic (LTCC) powder compacts determined by loading dilatometry

Xie, Rong‐Jun; Zuo, Ruzhong; Aulbach, Emil; Mackens, U.; Hirosaki, Naoto; Rödel, Jürgen

doi:10.1016/j.jeurceramsoc.2004.01.022

Cited by 17 publications

(20 citation statements)

References 28 publications

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“…Green et al 13 , investigated densification and sintering viscosity of LTCC ceramics by using thermomechanical analyzer under different compression stresses. Xie et al 14 , reported experimental determination of the uniaxial viscosity of two commercially available low temperature co-fired ceramic (LTCC) powder compact by loading dilatometer. When TMA is applied to porcelain stoneware tiles, TMA analysis enables one to measure viscosity of the whole system (i.e., glass phase and crystalline solid phase) so that real impact of compositional design on the body viscosity and hence on densification kinetics can be evaluated clearly.…”

Section: Introductionmentioning

confidence: 99%

The role of viscosity on microstructure development and stain resistance in porcelain stoneware tiles

Suvacı

Tamsu

2010

Journal of the European Ceramic Society

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Section: Introductionmentioning

confidence: 99%

The role of viscosity on microstructure development and stain resistance in porcelain stoneware tiles

Suvacı

Tamsu

2010

Journal of the European Ceramic Society

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“…The LTCC materials are crystallizable glass ceramics in which sintering is controlled by the viscous flow . Commonly reported apparent activation energies for the densification of LTCC materials are in the range of 400–700 kJ/mol . Q a s’ in the range of 215–235 kJ/mol are reported for the liquid‐phase sintered PZT ceramics doped with 1 wt% LiBiO 2 and 0.06 wt% CuO .…”

Section: Resultsmentioning

confidence: 99%

Sintering Behavior, Properties, and Applications of Co‐Fired Piezoelectric/Low Temperature Co‐Fired Ceramic (PZT‐SKN/LTCC) Multilayer Ceramics

Zhang

Eitel

2012

Int J Applied Ceramic Tech

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Materials and processing conditions have been developed allowing co‐firing of fluxed PZT‐SKN materials with commercial low temperature co‐fired ceramic (LTCC) tapes. Previously, Pb(Zr0.53, Ti0.47)O3–Sr(K0.25, Nb0.75)O3 (PZT‐SKN) ceramics fluxed with 1 wt% LiBiO2 and 1 wt% CuO addition were shown to sinter to high density at 900°C for 1 h, with a large d33 piezoelectric coefficient of ~415 pm/V. Currently, the master sintering curve (MSC) approach has been used to study the densification behaviors of fluxed PZT‐SKN and LTCC tapes. Different sintering mechanisms for fluxed PZT‐SKN ceramics and LTCC materials are confirmed by analyzing the apparent activation energy (Qa). Using knowledge gained from MSC results, an optimized sintering profile was developed. Multilayer PZT‐SKN/HL2000 (HeraLock™ Tape, Heraeus) stacks co‐fired at 900°C for 0.5 h maintain large piezoelectric coefficient (high field d33 > 340 pm/V). EDS analysis reveal limited interdiffusion of Pb from PZT‐SKN layers in LTCC and the appearance of Al, Ca, and Si in the PZT‐SKN near the PZT‐SKN/LTCC interface. Further, elemental interdiffusion was not detected at the center of piezoelectric layer in PZT‐SKN/LTCC multilayer ceramics and no subsequent reduction in piezoelectric coefficient d33 was observed. Finally, a piezoelectric microbalance with mass sensitivity of 150 kHz/mg was fabricated using the materials and methods developed.

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“…21,22 Hereby, the laminates were periodically strained with loads s of 7 and 70 kPa, respectively, and the deformation rate _ e was recorded. 21,22 Hereby, the laminates were periodically strained with loads s of 7 and 70 kPa, respectively, and the deformation rate _ e was recorded.…”

Section: Characterization Of Densification and Sintering Kineticsmentioning

confidence: 99%

Influence of Low-Temperature Co-Fired Ceramics Green Tape Characteristics on Shrinkage Behavior

Rauscher

Roosen

2007

Int J Applied Ceramic Technology

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To establish a better understanding of the complex densification and shrinkage processes of low‐temperature co‐fired ceramics (LTCC) and to improve the dimensional control in the manufacture of LTCC multilayer devices, the influence of glass, composite, and microstructural green tape characteristics on the densification and shrinkage behavior of LTCC materials, with special focus on the development of anisotropy, was investigated. To study the influence of these factors, a commercial LTCC system was analyzed regarding chemical and microstructural composition as well as sintering behavior. The results of the analysis showed that the commercial LTCC system is composed of alumina as a ceramic filler and a CaO–SiO2–B2O3–Al2O3 glass. Based on these results, a similar glass was produced. To understand the mechanisms of densification, its wetting behavior and viscosity as a function of temperature were investigated. As developed glass was mixed with an alumina powder and milled down to average grain sizes of 1, 2, and 3 μm, respectively. From these composite powders, slurries were prepared and tape cast. The sintering kinetics including onset temperature, development of viscous flow as well as phase development of both commercial and internally developed LTCC tapes LTCC tapes in relation to their modified composition and green tape structures were analyzed in situ by means of optical dilatometry, thermo‐mechanical analysis (TMA), and high‐temperature‐X‐ray diffraction. The viscous behavior of the glass‐filler composites was determined by means of cyclic dilatometry in a TMA device.

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Uniaxial viscosity of low-temperature cofired ceramic (LTCC) powder compacts determined by loading dilatometry

Cited by 17 publications

References 28 publications

The role of viscosity on microstructure development and stain resistance in porcelain stoneware tiles

The role of viscosity on microstructure development and stain resistance in porcelain stoneware tiles

Sintering Behavior, Properties, and Applications of Co‐Fired Piezoelectric/Low Temperature Co‐Fired Ceramic (PZT‐SKN/LTCC) Multilayer Ceramics

Influence of Low-Temperature Co-Fired Ceramics Green Tape Characteristics on Shrinkage Behavior

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