摘要:
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用切割–填充法,以硫铝酸盐水泥为基体,铌镁锆钛酸铅[Pb(Mg1/3Nb2/3)O3·PbTiO3·PbZrO3](PMN)为压电功能体制备了1–3型硫铝酸盐水泥基压电复合材料。研究了环境湿度对1–3型水泥基压电复合材料的压电性能和介电性能的影响。结果表明:随着相对湿度的增大,压电电压常数g33与机械品质因数Qm呈非线性减小。湿度对压电应变常数d33以及机电耦合系数Kp和Kt的影响较小。在低频和高频段,当相对湿度低于85%时,介电常数εr基本不受湿度的影响,表现出良好的介频稳定性。
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Composites with 1–3 connectivity were fabricated from Pb(Mg1/3Nb2/3)O3.PbTiO3.PbZrO3(PMN)and sulphoaluminate cement by the cut-filling process. Piezoelectric and dielectric properties of the composites at varied relative humidity were investigated. The results show that the piezoelectric voltage factor g33 and the mechanical quality Qm decrease nonlinearly with the relative humidity increasing. Compared with the piezoelectric voltage factor, the humidity has little effect on the piezoelectric strain factor d33 and the electromechanical coupling coefficients Kp and Kt. At lower and higher frequencies, the dielectric constant εr is nearly independent of the humidity below 85%, which indicates good dielectric-frequency stability.open open My husband cheated on me bystolic copay card click bystolic coupon voucher
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基金项目:
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国家自然科学基金(50502017);;
山东省优秀中青年科学家科研奖励基金(03BS060)资助项目。
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作者简介:
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参考文献:
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[1]黄世峰,常钧,刘福田,等.压电陶瓷/硫铝酸盐水泥复合材料的压电性及介电性[J].硅酸盐学报,2004,32(9):1082–1087.HUANG Shifeng,CHANG Jun,LIU Futian,et al.J Chin Ceram Soc(in Chinese),2004,32(9):1082–1087.
[2]HUANG Shifeng,CHANG Jun,CHENG Xin.Piezoelectric Properties of0–3PMN/sulphoaluminate cement composites[J].Smart Mater Struct,2004,13:270–274.
[3]张东,吴科如,李宗津.0–3型水泥基压电机敏复合材料的制备和性能[J].硅酸盐学报,2002,30(2):161–166.ZHANG Dong,WU Keru,LI Zongjin.J Chin Ceram Soc(in Chinese),2002,30(2):161–166.
[4]张东,吴科如,李宗津.2–2型水泥基压电机敏复合材料的研制[J].压电与声光,2002,24(3):217–231.ZHANG Dong,WU Keru,LI Zongjin.J Piezoelectrics Acoustooptics(in Chinese),2002,24(3):217–231.
[5]OTTO G P,CHEW W C.Improved calibration of a large open-ended coaxialprobe for dielectric measurements[J].IEEE Trans Instrum Meas,1991,40(4):742–746
[6]李北星,梁文泉,何真.MDF水泥基复合材料的微观结构与水敏性关系研究—胶结相渗透特性与湿度吸收[J].武汉工业大学学报,2000,22(1):10–14.LI Beixing,LIANG Wenquan,HE Zhen.J Wuhan Univ Technol(in Chinese),2000,22(1):10–14.
[7]胡昂,方永汉.湿度对DSP水泥基材料介电常数的影响[J].硅酸盐学报,1995,23(2):190–194.HU Ang,FANG Yonghan.J Chin Ceram Soc(in Chinese),1995,23(2):190–194.
[8]吴科如,王君达,谈慕华.MDF材料的介电性能湿敏研究[J].建筑材料学报,1998,1(1):15–18.WU Keru,WANG Junda,TAN Muhua.J Build Mater(in Chinese),1998,1(1):15–18.
[9]ANSI/IEEE176–1987.IEEE Standard on Piezoelectricity[S].USA:American National Standard,1987.redirect go why women cheat on men they love my husband cheated on me click here women who cheat on husband why married men cheat on their wives women cheat on men
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