Perceptual and affective processing in appetite for foods

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• 作者：J. Galea ; M. Chechlacz ; D.A. Booth ; S. Higgs ; N. Birbaumer ; A. Nouwen
• 关键词：A. Ceramics ; A. Glasses ; B. Dielectric properties ; C. Electron microscopy ; C. X-ray diffraction
• 刊名：Appetite (APPET)
• 出版年：2008
• 出版时间：September 2008
• 年：2008
• 卷：51
• 期：2
• 页码：366
• 全文大小：64 K

文摘

The 0.83ZnAl₂O₄-0.17TiO₂ (ZAT) ceramics were synthesized by solid state ceramic route. The effect of 27B₂O₃-35Bi₂O₃-6SiO₂-32ZnO (BBSZ) glass on the microwave dielectric properties of ZAT was investigated. The crystal structure and the microstructure of the ceramic-glass composites were studied by X-ray diffraction and scanning electron microscopic techniques. The low frequency dielectric loss was measured at 1 MHz. The dielectric properties of the sintered samples were measured in the microwave frequency range by the resonance method. Addition of 0.2 wt % of BBSZ improved the dielectric properties with quality factor (Q_u × f) > 120,000 GHz, temperature coefficient of resonant frequency (τ_f) = −7.3 ppm/°C and dielectric constant (_r) = 11.7. Addition of 10 wt % of BBSZ lowered the sintering temperature to about 950 °C with Q_u × f > 10,000 GHz, _r = 10 and τ_f = −23 ppm/°C. The reactivity of 10 wt % BBSZ added ZAT with silver was also studied. The results show that ZAT doped with suitable amount of BBSZ glass is a possible material for low-temperature co-fired ceramic (LTCC) application.