Normal Sintering of Li/Ta Co-doped (K,Na)NbO3 Lead-free Piezoceramics:Processing Effect on Phase Transitions and Densification

机译：Li / Ta共掺杂（K，Na）NbO3无铅压电陶瓷的正常烧结：工艺对相变和致密化的影响

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(K,Na)NbO3-based system is considered to be one of the best alternatives as lead-free piezoceramics,but its performance is extremely sensitive to fabrication process,which is mainly due to serious volatilization of alkali components during sintering.In this study,the effect of local sintering atmosphere on the densification and phase structure of lead-free piezoceramics with a nominal composition of (Li0.04K0.44Na0.52)(Nb0.85Ta0.15)O3 were studied.It was found thatdensification of (K,Na)NbO3-based ceramics occurs due to liquid phase sintering mechanism and the volatilization plays a role to generate the liquid phase.However,the volatilization causes the compositional deviation and hence affects the phase structure and piezoelectric properties of the resultant ceramics.Finally,a special sintering method was employed to control the volatilization and densification,which produced a lead-free piezoceramic sample with high piezoelectric coefficient d33 up to 251pC/N.

机译：（K，Na）NbO3基体系被认为是无铅压电陶瓷的最佳替代品之一，但其性能对制造过程极为敏感，这主要是由于烧结过程中碱成分的严重挥发所致。研究了局部烧结气氛对标称成分为（Li0.04K0.44Na0.52）（Nb0.85Ta0.15）O3的无铅压电陶瓷致密化和相结构的影响。发现（K ，Na）NbO3基陶瓷是由于液相烧结机理而产生的，挥发作用起液相的作用。但是，挥发会导致组成偏差，从而影响所得陶瓷的相结构和压电性能。采用特殊的烧结方法控制挥发和致密化，制备出压电系数d33高达251pC / N的无铅压电陶瓷样品。

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来源
《Proceedings of 4th International Workshop on Piezoelectric Materials and Applications in Actuators》|2007年|9-14|共6页
会议地点 Nanjing(CN)
作者
FU Hua; rnXIAO Jian; rnLIU Yinping;
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作者单位

Ke Wang@State Key Laboratory of New Ceramics and Fine Processing,Department of Materials Science and Engineering,Tsinghua University,Beijing 100084,P.R.China--JingFeng Li@State Key Laboratory of New Ceramics and Fine Processing,Department of Materials Science and Engineering,Tsinghua University,Beijing 100084,P.R.China--;

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正文语种 eng
中图分类压电陶瓷材料;
关键词
Lead-Free Piezoelectric Ceramic; (K,Na)NbO3; Phase transition;

机译：无铅压电陶瓷;（K，Na）NbO3;相变;

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1. Combined effects of Li content and sintering temperature on polymorphic phase boundary and electrical properties of Li/Ta co-doped (Na, K)NbO_3 lead-free piezoceramics [J] . Zong-Yang Shen, Ke Wang, Jing-Feng Li Applied Physics A: Materials Science & Processing . 2009,第4期

机译：Li含量和烧结温度对Li / Ta共掺杂（Na，K）NbO_3无铅压电陶瓷多晶相界和电性能的综合影响
2. Mechanistic interpretation of the reactive templated grain growth process of (Li, Ta, Sb) modified (K, Na)NbO3 textured lead-free piezoceramics [J] . Fu Zhengqian, Zhang Zhiqiang, Lu Ping, CrystEngComm . 2016,第37期

机译：（Li，Ta，Sb）改性（K，Na）NbO3织构的无铅压电陶瓷反应模板生长过程的机理解释
3. Phase structure and electrical properties of (Li,Ta)-doped (K,Na)NbO3 lead-free piezoceramics in the vicinity of Na/K = 50/50 [J] . Jia-Jun Zhou, Jing-Feng Li, Ke Wang, Journal of Materials Science . 2011,第15期

机译：Na / K = 50/50附近的（Li，Ta）掺杂（K，Na）NbO3 无铅压电陶瓷的相结构和电性能
4. Normal Sintering of Li/Ta Co-doped (K,Na)NbO3 Lead-free Piezoceramics:Processing Effect on Phase Transitions and Densification [C] . International Workshop on Piezoelectric Materials and Applications in Actuators . 2007

机译：Li / Ta共掺杂的正常烧结（K，Na）NbO3无铅压电陶瓷：处理效果对相变和致密化
5. Densification mechanisms and microstructural evolution leading to high density processing of prealloyed powders in supersolidus liquid phase sintering. [D] . Tandon, Rajiv. 1995

机译：致密化机理和微观结构演变导致超固相液相烧结中高密度加工预合金粉末。
6. Growth and properties of Li Ta modified (KNa)NbO3 lead-free piezoelectric single crystals [O] . Xiaoqing Huo, Limei Zheng, Shujun Zhang, -1

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7. Low-Temperature Sintering of ZnO and B2O3 Co-doped (K0.5Na0.5)NbO3 Lead-Free Piezoelectric Ceramics [O] . Rongxia Huang A, Yuzhen Zhao B, Yongjie Zhao C, 2015

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Normal Sintering of Li/Ta Co-doped (K,Na)NbO3 Lead-free Piezoceramics:Processing Effect on Phase Transitions and Densification

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