Characterization of Mg_0.8Zn_0.2TiO₃ Prepared via Liquid Phase Sintering

Abstract:

Mg_0.8Zn_0.2TiO₃ powder was synthesized by dissolved method and calcined at 550 °C for 4 hours. The powder exhibited single phase of Mg_0.8Zn_0.2TiO₃ and nano size particle. Sintered pellet samples were prepared by compacting calcined powder which contains 4wt% B₂O₃ (MZTA), 4wt% Bi₂O₃ (MZTB) as liquid additive and non-additive sample (MZTC). Phase identification and its percentage were analyzed based on XRD pattern using Rietveld method. The result shows major phase Mg_0.8Zn_0.2TiO₃ ranging from 72.83% for MZTA, 77.9% for MZTB and 82.61% for MZTC. Furthermore, minor phases were identified as Mg₂TiO₄ and other trace compound Mg₃TiO₂(BO₃)₂ for boron additive. Sintered pellet densities were determined by Archimedes method indicate that Bi₂O₃ additive has the most effective for densification. Microstructure characterization using SEM show that MZTB possesses the largest grain size ≈3.4µm followed by MZTA 2.3µm and MZTC 1.78µm. Dielectrics characterizations within frequency 1 Hz – 32 MHz exhibited space charge polarization characteristic for frequency <1 kHz, however for frequency >1 kHz showed frequency independence of dipolar polarizations and low dielectric loss having ε_r~17.

• Periodical: Advanced Materials Research (Volume 1112)
• Pages: 11-14
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1112.11
• Online since: July 2015
• Authors: Muhammad Saukani, Suasmoro Suasmoro
• Keywords: Dielectric, Dipolar Polarization, Liquid Phase Sintering

References

[1] C. -L. Huang, J. L. Hou, C. -L. Pan, C. -Y. Huang, C. -W. Peng, C. -H. Wei, Effect of ZnO additive on sintering behavior and microwave dielectric properties of 0. 95MgTiO3–0. 05CaTiO3 ceramics, J. Alloys and Compounds. 450 (2008) 359-363.

DOI: 10.1016/j.jallcom.2006.10.132

[2] J. Bernard, D. Houivet, J. El Fallah, and J. M. Haussonne, MgTiO3 for Cu base metal multilayer ceramic capacitors, J. Eur. Ceram. Soc. 24 (2004) 1877-1881.

DOI: 10.1016/s0955-2219(03)00461-8

[3] F. Belnou, J. Bernard, D. Houivet, and J. -M. Haussonne, Low temperature sintering of MgTiO3 with bismuth oxide based additions, J. Eur. Ceram. Soc. 25 (2005) 2785-2789.

DOI: 10.1016/j.jeurceramsoc.2005.03.140

[4] Y. -F. Deng, S. -D. Tang, L. -Q. Lao, and S. -Z. Zhan, Synthesis of magnesium titanate nanocrystallites from a cheap and water-soluble single source precursor, Inorg. Chim. Acta. 363 (2010) 827-829.

DOI: 10.1016/j.ica.2009.11.020

[5] S. Pratapa, M. A. Baqiya, R. Lestari, and R. Angela, A simple dissolved metals mixing method to produce high-purity MgTiO3 nanocrystals, AIP Conf. Proc. 1586 (2014) 39-42.

DOI: 10.1063/1.4866726

[6] C. -L. Huang, C. -L. Pan, and S. -J. Shium, Liquid phase sintering of MgTiO3–CaTiO3 microwave dielectric ceramics, Mater. Chem. Phys. 78 (2003) 111-115.

DOI: 10.1016/s0254-0584(02)00311-5

[7] M. -L. Hsieh, L. -S. Chen, H. -C. Hsu, S. Wang, M. -P. Houng, and S. -L. Fu, Effect of oxide additives on the low-temperature sintering of dielectrics (Zn, Mg)TiO3, Mate. Res. Bull. 43 (2008) 3122-3129.

DOI: 10.1016/j.materresbull.2007.11.005

[8] B. A. Wechsler and R. B. Von Dreele, Structure refinements of Mg2TiO4, MgTiO3 and MgTi2O5 by time-of-flight neutron powder diffraction, Acta Crystallogr. Sect. B : Struct. Sci. 45 (1989) 542-549.

DOI: 10.1107/s010876818900786x

[9] K. -W. Tay, Y. -P. Fu, J. -F. Huang, and H. -C. Huang, Effect of Bi2O3 and B2O3 additives on the sintering temperature, microstructure, and microwave dielectric properties for Sm(Mg0. 5Ti0. 5)O3 ceramics, Ceram. Int. 37 (2011) 1025-1031.

DOI: 10.1016/j.ceramint.2010.11.017

[10] S. Fujino, C. Hwang, and K. Morinaga, Surface tension of PbO-B2O3 and Bi2O3-B2O3 glass melts, J. Mater. Sci. 40 (2005) 2207-2212.

DOI: 10.1007/s10853-005-1934-7

[11] S. J. Penn, N. M. Alford, A. Templeton, X. Wang, M. Xu, M. Reece, Effect of Porosity and Grain Size on the Microwave Dielectric Properties of Sintered Alumina, J. Am. Ceram. Soc. 80 (1997) 1885-1888.

DOI: 10.1111/j.1151-2916.1997.tb03066.x