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铌酸钾钠基无铅压电材料的水热法制备和结构调控

DOI: 10.7521/j.issn.0454-5648.2014.04.02

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Abstract:

采用水热合成法分成铌酸钾钠(KNN),研究了水热起始碱浓度、反应温度以及添加剂种类和浓度对其晶体结构与形貌的影响。研究结果表明当起始碱浓度比大于或小于1时,KNN晶粒以台阶式生长形成方块晶粒,而碱浓度比接近1时,KNN晶粒细化并大量团聚成球形;当倾向形成富钠型KNN时,铌酸钠长成了纳米棒。当水热反应温度低于200℃时,得到的晶体产物是水热反应的中间产物,经过后续热处理可直接转化为KNN结晶物;添加不同浓度(1~10g/L)的添加剂聚乙二醇400(PEG400)、三乙醇胺、十二烷基苯磺酸钠(SDBS)、乙二胺四乙酸(EDTA)后,均能得到KNN结晶体,但对KNN晶粒形貌影响较大,添加5g/L的PEG400可以抑制晶粒团簇,得到良好分散性且晶体形貌规则的KNN纳米晶颗粒。

References

[1]  SAITO Y, TAKAO H, TANI T, et al. Lead-free piezoceramics\[J\]. Nature, 2004, 432: 84-87.
[2]  ZHANG S J, XIA R, SHROUT T R. Modified (K0.5Na0.5)?NbO3 based Lead-free Piezoelectrics with Broad Temperature Usage Range\[J\]. Appl Phys Lett, 2007, 94: 132913.
[3]  LI J, WANG K, ZHANG L. Ferroelectric and piezoelectric properties of fine-grained Na0.5K0.5NbO3 lead-free piezoelectric ceramics prepared by spark plasma sintering\[J\]. J Am Ceram Soc, 2006, 89(2):706-709.
[4]  ZHEN Y, LI J. Normal sintering of (K,Na)NbO3-based ceramics: Influence of sintering temperature on densification, microstructure and electrical properties[J]. J Am Ceram Soc,89 (2006): 3669-3675.
[5]  LIU N, WANG K, LI J. Hydrothermal synthesis and spark plasma sintering of (K, Na) NbO3 lead‐free piezoceramics[J]. J Am Ceram Soc, 2009, 92 (8): 1884-1887.
[6]  BAI L, ZHU K, SU L, et al. Synthesis of (K, Na) NbO3 particles by high temperature mixing method under hydrothermal conditions[J]. Mater Lett, 2010, 64(1): 77-79.
[7]  ZHANG M, GUO M, ZHOU Y. Low-temperature preparation of KxNa (1-x) NbO3 lead‐free piezoelectric powders by microwave‐hydrothermal synthesis[J]. Interl J Appl Ceram Tech, 2011, 8(3): 591-596.
[8]  YANG J, CHEN H, WANG Z. Synthesis of sodium-potassium niobate (K, Na) NbO3 lead-free piezoelectric powders using solvothermal and hydrothermal processing[C]//Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA), 2010 Symposium on IEEE, 2010: 249-253.
[9]  BAI L, ZHU K, QIU J, et al. Phase evolution of (K, Na) NbO3 powder prepared by high temperature mixing under hydrothermal conditions[J]. Particuology, 2010, 8(5): 477-481.
[10]  TAN G Q, REN H J, XIONG P. Influence of Ta5+ Doping on the Piezoelectric Properties of KNN Ceramics[J]. Key Eng Mater, 2012, 512: 1399-1402.
[11]  CAO W and RANDALL C A. Grain Size and domain size relations in bulk ceramic ferroelectric materials\[J\]. J Phys Chem Solids, 1996, 57 (10):1499-1505.
[12]  PARK H Y, AHN C W, SONG H C. Microstructure and piezoelectric properties of 095(Na0.5K0.5)NbO3-0.05BaTiO3 ceramics\[J\]. Appl Phys Lett, 2006, 89:062906.
[13]  明保全,王矜奉,臧国忠,等.铌酸钾钠基无铅压电陶瓷的X射线衍射与相变分析\[J\].物理学报,2008,57:5962-5967.
[14]  MING Baoquan, WANG Jinfeng, ZANG Guozhong, et al.Acta Physica Sinica? (in Chinese). 2008,57:5962-5967.
[15]  ZHEN Y, LI J. Abnormal Grain Growth and New Coreshell Structure in (K,Na)NbO3based Lead-free Piezoelectric Ceramics[J]. J Am Ceram Soc, 2007, 90: 3496-3502.
[16]  ZHEN Y, LI J, WANG K. Spark plasma sintering of Li/Ta-modified (K,Na)NbO3 leadfree piezoelectric ceramics: Post-annealing temperature effect on phase structure, electrical properties and grain growth behavior[J]. Mater Sci Eng: B, 2011, 176:1110-1114.

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