Abstract
A rapid and facile approach was developed for the synthesis of ultrafine SmAlO3 powders through the combustion of stearic acid precursors. The obtained products were characterized by typical techniques including X-ray diffraction (XRD), Fourier Transform Infrared (FT-IR), thermogravimetric and differential thermal analysis (TG-DTA), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) to analyze the phase composition and microstructure. The dielectric characteristics of SmAlO3 microwave ceramics, using the as-obtained products as original materials, were also studied. Compared with the conventional solid-state reaction method, the synthesis temperature was dramatically reduced to 750 °C. The large-size sheet structure was composed of a number of micro/nano-scale crystallites, which were mostly irregular in shape due to the mutual growth and overlapping shapes of adjacent grains. The SmAlO3 ceramics with high density and uniform microstructure were obtained after sintering at 1500 °C for 4 h due to the favorable sintering activity of the as-synthesized powders. In addition, desired dielectric properties at microwave frequencies (dielectric constant εr = 20.22, quality factor Q·f = 74110 GHz, and a temperature coefficient of resonant frequency τf = −74.6 ppm/°C) were achieved.
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Wu SP, Jiang C, Mei YX, et al. Synthesis and microwave dielectric properties of Sm2SiO5 ceramics. J Am Ceram Soc 2012, 95: 37–40.
Surendran KP, Bijumon PV, Mohanan P, et al. (1−x)MgAl2O4-xTiO2 dielectrics for microwave and millimeter wave applications. Appl Phys A 2005, 81: 823–826.
Li JM, Wang H, Tan J, et al. Low temperature sintering and microwave dielectric properties of Nd[(Zn0.7Co0.3)0.5Ti0.5]O3 ceramics derived from the powders synthesized by ethylenediaminetetraacetic acid precursor route. Ceram Int 2019, 45: 24044–24051.
Takahashi S, Ogawa H, Kan A. Electronic states and cation distributions of MgAl2O4 and Mg0.4Al2.4O4 microwave dielectric ceramics. J Eur Ceram Soc 2018, 38: 593–598.
Cho SY, Kim IT, Hong KS. Microwave dielectric properties and applications of rare-earth aluminates. J Mater Res 1999, 14: 114–119.
Suvorov D, Valant M, Jancar B, et al. CaTiO3-based ceramics: Microstructural development and dielectric properties. Acta Chim Slov 2001, 48: 87–99.
Xu Y, Fu RL, Agathopoulos S, et al. Sintering behavior, microstructure, and microwave dielectric properties of Ca0.66Ti0.66Sm0.34Al0.34O3 ceramics. Ceram Int 2016, 42: 19036–19041.
Qu JJ, Liu F, Wei X, et al. Sintering behaviour and microwave dielectric properties of a new complex perovskite: (1−x)(Sr0.3Ca0.427Nd0.182)TiO3-xSmAlO3 ceramics. Bull Mater Sci 2016, 39: 1645–1649.
Solomon S. SmAlO3 + Ba(Zn1/2Nb2/3)O3: Microwave ceramic composite. J Mater Sci: Mater Electron 2011, 22: 1203–1207.
Zhao Y, Wei DD, Du J, et al. Effect of SmAlO3 doping on the properties of (1−x)(K0.44Na0.52Li0.04)((Nb0.91Ta0.05Sb0.04)O3 lead-free ceramics. J Electroceram 2019, 42: 74–78.
Huang CL, Chen YC. Low temperature sintering and microwave dielectric properties of SmAlO3 ceramics. Mater Res Bull 2002, 37: 563–574.
Qin ZH, Huang YF, Shen CY, et al. Effect of preparation method on microwave dielectric properties of 0.7CaTiO3-0.3SmAlO3 ceramic. J Mater Sci: Mater Electron 2016, 27: 4157–4162.
Wang S, Hou YD, Ge HY, et al. A two step molten method for low temperature synthesis of La0.9Bi0.1AlO3 relaxor nanocrystalline. J Alloys Compd 2014, 584: 402–405.
Mendoza-Mendoza E, Montemayor SM, Escalante-García JI, et al. A “green chemistry” approach to the synthesis of rare-earth aluminates: Perovskite-type LaAlO3 nanoparticles in molten nitrates. J Am Ceram Soc 2012, 95: 1276–1283.
Girish HN, Vijaya Kumar MS, Byrappa K, et al. Hydrothermal synthesis of some of lanthanide aluminium perovskites-LnAlO3 (Ln=La, Sm and Gd). Mater Res Innov 2015, 19: 270–274.
Wu SH, Shi F. Phase pure (Ba0.3Sr0.7)(Zn1/3Nb2/3)O3 nanocrystalline particles synthesized by sol-gel technique at low temperature and their application. J Sol-Gel Sci Technol 2012, 64: 264–268.
Takata H, Iiduka M, Notsu Y, et al. Synthesis of rare-earth orthoaluminates by a polymer complex method. J Alloys Compd 2006, 408–412: 1190–1192.
Li JM, Qiu T. Synthesis and characterization of SmAlO3 dielectric material by citrate precursor method. J Sol-Gel Sci Technol 2012, 61: 112–118.
Li JM, Qiu T. Synthesis of SmAlO3 nanocrystalline powders by polymeric precursor method. Appl Phys A 2011, 104: 465–469.
Hakki BW, Coleman PD. A dielectric resonator method of measuring inductive capacities in the millimeter range. IEEE Trans Microw Theor Tech 1960, 8: 402–410.
Courtney WE. Analysis and evaluation of a method of measuring the complex permittivity and permeability microwave insulators. IEEE Trans Microw Theor Tech 1970, 18: 476–485.
Dimitar P, Bogdan A, Vasil L. Sol-gel synthesis, surface and magnetic properties of nanocrystalline SmAlO3. J Rare Earths 2010, 28: 602–605.
Dippong T, Cadar O, Levei EA, et al. Influence of polyol structure and molecular weight on the shape and properties of Ni0.5Co0.5Fe2O4 nanoparticles obtained by sol-gel synthesis. Ceram Int 2019, 45: 7458–7467.
Lee MK, Kang S. A study of salt-assisted solution combustion synthesis of magnesium aluminate and sintering behaviour. Ceram Int 2019, 45: 6665–6672.
Zhang Y, Zhang YC, Fu BJ, et al. Effects of pH on the crystal structure, morphology and microwave dielectric properties of Bi12TiO20 ceramics synthesized by citrate sol-gel method. J Mater Sci Mater Electron 2015, 26: 3179–3185.
Wang H, Huang CE, Deng Q, et al. Effect of co-precipitation method on microwave dielectric properties of 0.95(Ca0.88Sr0.12)TiO3-0.05(Bi0.5Na0.5)TiO3 ceramics. Ceram Int 2018, 44: 8700–8705.
Qin ZH, Huang YF, Shen CY, et al. Effect of preparation method on microwave dielectric properties of 0.7CaTiO3-0.3SmAlO3 ceramic. JMater Sci: Mater Electron 2016, 27: 4157–4162.
Wang J, Lu XC, Li YY, et al. Correlations between microwave dielectric properties and crystal structures of Sb-doped Co0.5Ti0.5NbO4 ceramics. Ceram Int 2020, 46: 3464–3470.
Acknowledgements
The work was financially supported by the Natural Science Foundation of Anhui Provincial Education Department (Nos. KJ2019A0054 and KJ2018A0041), and the National Natural Science Foundation of China (No. 51802003).
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Li, J., Zhang, C., Liu, H. et al. Structure, morphology, and microwave dielectric properties of SmAlO3 synthesized by stearic acid route. J Adv Ceram 9, 558–566 (2020). https://doi.org/10.1007/s40145-020-0394-5
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DOI: https://doi.org/10.1007/s40145-020-0394-5