Abstract
In the present work, hybrid sintering technique which couples the resistive heating and microwave heating is employed to sinter infrared transparent La0.15Y1.85O3 to 99.2% of the theoretical density for the first time to the best of our knowledge. The presence of La3+ in the yttria matrix improves the hardness properties to a greater extent without affecting the transmittance properties, but there is a deterioration in the thermal properties of the sample. So we have limited our studies to La0.15Y1.85O3 which shows better optical, thermal, and hardness properties. The pellets fabricated from the ultra-fine nano powder with average particle size of ~12 nm synthesized by combustion technique and sintered at 1430 °C with an average grain size of 0.22 μm show ~80.1% transmittance in the UV–visible region and 81% in mid infrared region. For a comparative study of the optical, mechanical, and thermal properties, two other variants of sintering strategies namely conventional sintering and microwave sintering are also employed. A comprehensive analysis on the hardness reveals that the hardness of the pellets sintered via hybrid heating is 9.73 GPa and is superior to the pellets sintered using the other two techniques. The thermal conductivity of the sample is also analyzed in detail. The results clearly indicate that the La0.15Y1.85O3 ultra-fine nano powder synthesised by the single-step combustion method and sintered via microwave hybrid heating shows better transmittance properties without compromising the mechanical properties, and can be used very effectively for the fabrication of infrared transparent windows and domes.
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References
Curtis CE. Properties of yttrium oxide ceramics. J Am Ceram Soc 1957, 40: 274–278.
Harris DC. Materials for Infrared Windows and Domes, Properties and Performance. Bellingham, WA, USA: SPIE Press, 1999.
Serivalsatit K, Kokuoz B, Yazgan-Kokuoz B, et al. Synthesis, processing and properties of submicrometer-grained highly transparent yttria ceramics. J Am Ceram Soc 2010, 93: 1320–1325.
Boniecki M, Librant Z, Wesolowski W, et al. The thermal shock resistance of Y2O3 ceramics. Ceram Int 2016, 42: 10215–10219.
Pastor AC, Pastor RC. Crystal growth above 2200 °C by the Verneuil method (part II). Mater Res Bull 1967, 2: 555–559.
Sova RM, Linevsky MJ, Thomas ME, et al. High-temperature infrared properties of sapphire, AlON, fused silica, yttria, and spinel. Infrared Phys Techn 1998, 39: 251–261.
Harris DC. Durable 3–5 μm transmitting infrared window materials. Infrared Phys Techn 1998, 39: 185–201.
Tsukuda Y. Properties of black Y2O3 sintered bodies. Mater Res Bull 1981, 16: 453–459.
Apetz R, van Bruggen MPB. Transparent alumina: A light scattering model. J Am Ceram Soc 2003, 86: 480–486.
Rhodes WH, Wei GC, Trickett EA. Lanthana-doped yttria: A new infrared window material. In: Proceedings of the SPIE 0683, Infrared and Optical Transmitting Materials, 1986, DOI: 10.1117/12.936410.
Li X, Mao X, Feng M, et al. Fabrication of transparent La-doped Y2O3 ceramics using different La2O3 precursors. J Eur Ceram Soc 2016, 36: 2549–2553.
Huang Y, Jiang D, Zhang J, et al. Fabrication of lanthanum doped yttria transparent ceramics. Chin Sci Bull 2009, 54: 2143–2146.
Huang Y, Jiang D, Zhang J, et al. Precipitation synthesis and sintering of lanthanum doped yttria transparent ceramics. Opt Mater 2009, 31: 1448–1453.
Dong LM, Han ZD, Wu Z, et al. Preparation of La0.1Nd0.1Y1.8O3 nanopowders and characterisations of the optical properties. Mater Chem Phys 2012, 135: 575–578.
Luo J-M, Deng L-P, Xu J-L. Fabrication of (Nd0.01LaxY0.99−x)2O3 nanoparticles and transparent ceramics by combustion synthesis. J Nanosci Nanotechno 2011, 11: 9705–9708.
Huang Y, Jiang D, Zhang J, et al. Fabrication of transparent lanthanum-doped yttria ceramics by combination of two-step sintering and vacuum sintering. J Am Ceram Soc 2009, 92: 2883–2887.
Gan L, Park Y-J, Zhu L-L, et al. Fabrication and properties of La2O3 doped transparent yttria ceramics by hot pressing sintering. J Alloys Compd 2017, 695: 2142–2148.
Klein CA. Thermal shock resistance of infrared transmitting windows and domes. Opt Eng 1998, 37: 2826–2836.
Gentilman RL. Current and emerging materials for 3–5 micron IR transmission. In: Proceedings of the SPIE 0683, Infrared and Optical Transmitting Materials, 1986, DOI: 10.1117/12.936409.
Boccaccini AR, Silva DD. Industrial developments in the field of optically transparent inorganic materials: A survey of recent patents. Recent Pat Mater Sci 2008, 1: 56–73.
Qin X, Yang H, Shen D, et al. Fabrication and optical properties of highly transparent Er:YAG polycrystalline ceramics for eye-safe solid-state lasers. Int J Appl Ceram Technol 2013, 10: 123–128.
Yi H-L, Jiang Z-J, Mao X-J, et al. New development of transparent alumina ceramics. J Inorg Mater 2010, 25: 795–800.
Grujicic M, Bell WC, Pandurangan B. Design and material selection guidelines and strategies for transparent armor systems. Mater Design 2012, 34: 808–819.
Salem JA. Transparent armor ceramics as spacecraft windows. J Am Ceram Soc 2013, 96: 281–289.
Ratches JA. Review of current aided/automatic target acquisition technology for military target acquisition tasks. Opt Eng 2011, 50: 072001.
James J, Jose R, John AM, et al. Single step process for the synthesis of nanoparticles of ceramic oxide powders. U.S. Patent 6,761,866. 2004.
Thomas JK, Kumar HP, Pazhani R, et al. Synthesis of strontium zirconate as nanocrystals through a single step combustion process. Mater Lett 2007, 61: 1592–1595.
Shannon RD. Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides. Acta Crystallogr A 1976, 32: 751–767.
Troph WJ, Harris DC. Mechanical thermal and optical properties of yttria and lanthana-doped yttria. In: Proceedings of the SPIE 1112, Window and Dome Technologies and Materials, 1989, DOI: 10.1117/12.960758.
Horvath SF, Harmer MP, Williams DB, et al. Analytical transmission electron microscopy of La2O3-doped Y2O3. J Mater Sci 1989, 24: 863–872.
Wei GC, Emma T, Rhodes WH, et al. Analytical microscopy study of phases and fracture in Y2O3–La2O3 alloys. J Am Ceram Soc 1988, 71: 820–825.
Mathew CT, Solomon S, Koshy J, et al. Infrared transmittance of hybrid microwave sintered yttria. Ceram Int 2015, 41: 10070–10078.
Croquesel J, Bouvard D, Chaix J-M, et al. Direct microwave sintering of pure alumina in a single mode cavity: Grain size and phase transformation effects. Acta Mater 2016, 116: 53–62.
Goldstein A, Krell A. Transparent ceramics at 50: Progress made and further prospects. J Am Ceram Soc 2016, 99: 3173–3193.
Roy TK. Assessing hardness and fracture toughness in sintered zinc oxide ceramics through indentation technique. Mat Sci Eng A 2015, 640: 267–274.
Sahin O, Uzun O, Sopicka-Lizer M, et al. Dynamic hardness and elastic modulus calculation of porous SiAlON ceramics using depth-sensing indentation technique. J Eur Ceram Soc 2008, 28: 1235–1242.
Li H, Bradt RC. The microhardness indentation load/size effect in rutile and cassiterite single crystals. J Mater Sci 1993, 28: 917–926.
Gong J, Li Y. An energy-balance analysis for the size effect in low-load hardness testing. J Mater Sci 2000, 35: 209–213.
Mukerji S, Kar T. Vicker’s microhardness studies of L-arginine hydrobromide monohydrate crystals (LAHBr). Cryst Res Technol 1999, 34: 1323–1328.
Gong J, Wu J, Guan Z. Load dependence of the apparent hardness of silicon nitride in a wide range of loads. Mater Lett 1998, 35: 58–61.
Liu WH, Wu Y, He JY, et al. Grain growth and Hall–Petch relationship in a high-entropy FeCrNiCoMn alloy. Scripta Mater 2013, 68: 526–529.
Acknowledgements
This work is supported by the Department of Science and Technology, Science and Engineering Research Board, Government of India under Grant No. SB/S2/CMP-0021/2013.
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Thomas, J.K., Mathew, C.T., Koshy, J. et al. Influence of La3+ ion in the yttria matrix in improving the microhardness of infrared transparent nano La x Y2-xO3 sintered via hybrid heating. J Adv Ceram 6, 240–250 (2017). https://doi.org/10.1007/s40145-017-0235-3
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DOI: https://doi.org/10.1007/s40145-017-0235-3