【作者】 孙琳；

【导师】 孙清池；

【作者基本信息】 天津大学 ， 材料学， 2004， 硕士

【摘要】 本文研究了PZN-PSN-PMS-PZT系压电陶瓷组成、工艺对材料性能的影响。通过选取许多Zr/Ti不同的组成点进行了研究，最终找到了该系统的准同型相界（MPB）的大致位置并且得到了几个综合性能较好的组成点。结果如下:对于不掺杂的0.03PZN- 0.03PSN-0.04PMS-0.9PZT系统，当采用一次合成工艺时，未掺杂的系统准同型相界在Zr/Ti为0.445/0.455～0.44/0.46附近；加Sr2＋、Ba2+的系统准同型相界在Zr/Ti为0.455/0.445～0.45/0.45附近。采用二次合成工艺后，无论掺杂与否,系统的准同型相界向富Zr的方向发生了移动。在工艺上，实验结果表明采用二次合成工艺比一次合成工艺效果好，采用二次合成工艺，烧结温度为1260℃，对于不掺杂的0.03PZN-0.03PSN-0.04PMS-0.9PZT系压电陶瓷，Zr/Ti=0.435/0.465时，性能最好： tanδ％=0.30； =1143； d33=303×10－12C/N； Qm=1233； Kp=55.1%； Tc=309℃。对于掺杂Sr2＋，Ba2+的0.03PZN-0.03PSN-0.04PMS-0.9PZT系压电陶瓷，Zr/Ti=0.455/0.445时，性能最好： tanδ％=0.42，=1552， d33=338×10－12C/N， Qm=1396，Kp=56.8%， Tc=278℃。本文还探讨了Sr2＋，Ba2+同时掺杂对该系统陶瓷的影响和CeO2掺杂对其性能的影响，初步分析了产生这些现象的原因。另外，本文还对该五元系陶瓷在强场下的损耗较大的问题进行了讨论。本文使用X射线衍射（XRD）对合成粉末和烧成试样的相组成进行了分析，通过扫描电子显微镜（SEM）观察分析了试样表面和断面处的显微结构，并对等静压成型和干压成型对材料的影响进行了比较。更多还原

【Abstract】 0.03PZN-0.03PSN-0.04PMS-0.9PZT quinary system piezoelectric ceramics with various Zr/Ti ratio near morphotropic phase boundary (MPB) were prepared by traditional processing method. In order to find out the location of MPB and get some compositions having good properties, the relationship between the properties of this quinary system piezoelectric ceramics and the compositions were studied. For 0.03PZN-0.03PSN- 0.04PMS-0.9PZT (S1) ceramic system, its MPB lied in between Zr/Ti=0.445/0.455 and Zr/Ti=0.44/0.46 when the calcining process was one step calcining process. For (Pb0.96Sr0.02Ba0.02) [ZrxTiy(ZnNb) 0.03 (SnNb)0.03(MnSb)0.04]O3 (S2) ceramic system, its MPB was located in the vicinity of Zr/Ti=0.455/0.445～0.45/0.45 when one step calcining process was applied. If two-step calcining is taked, these MPB of two above system will be moved toward Zr-rich direction.The experimental results revealed that the effect of two-step calcining process was better than that of one step calcining process. So when two-step calcining was uesd ,the sintering temperature was 1260℃and Zr/Ti is equal to 0.435/0.465 , S1 was located in the vicinity of MPB and it had good properties(=1143,d33=303×pC/N, Kp=55.1%, tanδ%=0.4, Qm=1233, Tc=309℃).For S2 ceramic system, when two-step calcining was uesd ,the sintering temperature was 1260℃ and x/y= 0.455/0.445, it has best properties : =1552,d33=338×pC/N, Kp=56.8%, tanδ％=0.4, Qm=1396,Tc=278℃.In addition, the effect of Sr2+,Ba2+ co-doping on this piezoelectric ceramics and the effect of CeO2 doping on this piezoelectric ceramics were investigated respectively and the reasons of these phenomena were primarily analyzed. And the question of great loss of this material in the strong electric field was discussed.X-ray diffraction(XRD) were applied to analyze the phase of calcining powders and sintered samples. The scanning electronic microscope (SEM) was used to analyze microstructure of surface and cross section of sintered samples. What’s more, the differences between isolation-pressing and dry-pressing were investigated. <WP=5>更多还原