Improvement in Perfomances of Low-Temperature Sintered PZT and Application to Smart Ambient Sensors.

低温烧结PZT性能的改进及其在智能环境传感器中的应用。

• 批准号: 07650368
• 负责人: MURAKAMI Kenji
• 金额: $ 0.96万
• 依托单位: Shizuoka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07650368/
• 关键词: Pb (Zr, Ti) O_3 Ceramics; Low-Temperature Sintering; Grain Boundary; Smart Sensor; Humidity Sensor; Electron Microscopy; Effects of Additives; Piezoelectric Effect; 圧電セラミックス; PZT; 走査型電子顕微鏡; 複合酸化物; TEM; SEM

It is concluded from the experimental results on the grain boundaries and the isothermal shrinkage curves of the low-temperature sintered Pb (Zr, Ti) O_3 ceramics with complex oxides, BiFeO_3 and Ba (Cu, W) O_3 additives that the low-temperature sintering process is divided into (1) rearrangement of grains, (2) solution-precipitation or grain boundary diffusion, and (3) grain growth. Therefore, the densification process is enhanced by a formation of liquid phase at the second stage composed of the lead and copper oxides segregated at grain boundary. Furthermore, the sintering temperature has been lowered to 900ﾟC by introducing the pot-milling method.In order to investigate the effects of additives on the electrical properties, the low-temperature sintered Pb (Zr, Ti) O_3 ceramics have been prepared with the various oxide forms of BiFeO_<3-> and Ba (Cu_<0.5>W_<0.5>) O_<3-> related additives. The addition of any combination of the various metal oxides did not change the phase relations. It is indicated again from the density measurement that a Cu component is effective for the promotion of densification at low temperature. The SEM observations reveal that a W component is effective for grain growth at low temnperature. It is also found that the BF-related additives are useful in improving the mechanical quality factor, and the BCW-related additives are useful for improving the dielectric constant.Finally, it is clarified from the measurements on the relative humidity (RH) characteristics of the electrical properties of low-temperature sintered Pb (Zr, Ti) O_3 ceramics that the relative dielectric constant and the dissipation factor increase with an increase in the RH and the electromechanical coupling factor and the mechanical quality factor decrease slightly with an increase in the RH.On the contrary, the dielectric constant is independent on the RH.

通过对含复合氧化物、BiFeO_3和Ba(Cu，W)O_3复合氧化物的低温烧结陶瓷的晶界和等温收缩曲线的研究表明，低温烧结过程可分为(1)晶界重排、(2)溶解析出或晶界扩散、(3)晶界长大。因此，在第二阶段形成了由晶界偏析的铅和铜氧化物组成的液态，从而促进了致密化过程。为了研究添加剂对材料电性能的影响，用不同氧化物形式的BiFeO_&lt；3-&gt；和Ba(Cu_&lt；0.5&gt；W_&lt；0.5&gt；)O_&lt；3-&gt；的相关添加剂制备了低温烧结的Pb(Zr，Ti)O_3陶瓷。添加各种金属氧化物的任何组合都不会改变相关系。密度测量再次表明，铜组分对低温致密化的促进作用是有效的。扫描电子显微镜观察表明，在较低温度下，W组分对晶粒生长是有效的。BF相关添加剂有助于提高材料的机械品质因数，BCW相关添加剂有助于改善材料的介电常数。最后，通过对低温烧结的Pb(Zr，Ti)O_3陶瓷电性能的相对湿度(RH)特性的测量，发现材料的相对介电常数和损耗因数随相对湿度的增大而增大，机电耦合因数和机械品质因数随相对湿度的增大而略有降低。

项目成果

村上健司: "Effects of Adding Varicus Metal Oxides on Low-Temperature Sintered Pb (Zr,Ti) O_3 Ceramics" Japanese Journal of Applsed Physics. 35・9B. 5188-5191 (1996)

Kenji Murakami：“添加 Varicus 金属氧化物对低温烧结 Pb (Zr,Ti) O_3 陶瓷的影响”日本应用物理学杂志 35・9B 5188-5191 (1996)。

村上健司: "Morphotropic Phase Boundary and Microstructure of Low-Temperature Sintered PZT Ceramics with BiFeO_3 and Ba(Cua_5Wo_5)O_3" Proceedings of 9th IEEE International Symposium in Applications of Ferroelectrics. 19-20 (1995)

Kenji Murakami：“BiFeO_3 和 Ba(Cua_5Wo_5)O_3 低温烧结 PZT 陶瓷的同形相界和微观结构”第 9 届 IEEE 国际铁电体应用研讨会论文集（1995 年）。

村上健司: "Microanalysis of Grain Boundary on Low-Temperature Sintered Pb (Zr, Ti) O_3 Ceramics with Complex Oxide Additives" Japanese Journal of Applied Physics. 34. 5457-5461 (1995)

Kenji Murakami：“含复杂氧化物添加剂的低温烧结 Pb (Zr, Ti) O_3 陶瓷的晶界微观分析”日本应用物理学杂志 34. 5457-5461 (1995)。

金子正治: "Low-Temperature Sintering of Pb (Zr, Ti) O_3 Ceramics with BiFeO_3 and Ba (Cu_<0.5>W_<0.5>) O_3 of Perouskite-Type Crystal Structure" Bulletin of Research Institute of Electronics, Shizuoka Univercity. 30. 143-148 (1996)

Masaharu Kaneko：“钙钛矿型晶体结构的BiFeO_3和Ba(Cu_<0.5>W_<0.5>)O_3的Pb(Zr,Ti)O_3陶瓷的低温烧结”静冈大学电子研究所通报30。 .143-148 (1996)

村上健司: "Microanalysis of Grain Bcundary on Low-Temperature Sintered Pb(Zr, Ti)O_3 Ceramics with Complex Oxide Additives" Japanese Journal of Applied Physics. 34. 5457-5461 (1995)

Kenji Murakami：“含有复杂氧化物添加剂的低温烧结 Pb(Zr, Ti)O_3 陶瓷上的晶粒微观分析”，日本应用物理学杂志 34. 5457-5461 (1995)。