Hostname: page-component-cd9895bd7-gxg78 Total loading time: 0 Render date: 2024-12-29T11:32:27.410Z Has data issue: false hasContentIssue false
  • English
  • Français

Influence of processing route and SiO2 on sintering ability, CTE, and dielectric constant of β-Si4Al2O2N6

Published online by Cambridge University Press:  31 January 2011

Ibram Ganesh ,
N. Thiyagarajan ,
D.C. Jana ,
G. Sundararajan ,
S.M. Olhero  and
J.M.F. Ferreira
Ibram Ganesh
Affiliation:
Center for Advanced Ceramics, International Advanced Research Centre for Powder Metallurgy and New Materials (ARCI), Hyderabad 500 005, A.P., India; and Department of Ceramics and Glass Engineering, Center for Research on Ceramics and Composites (CICECO), University of Aveiro, Aveiro P-3810193, Portugal
N. Thiyagarajan
Affiliation:
Center for Advanced Ceramics, International Advanced Research Centre for Powder Metallurgy and New Materials (ARCI), Hyderabad 500 005, A.P., India
D.C. Jana
Affiliation:
Center for Advanced Ceramics, International Advanced Research Centre for Powder Metallurgy and New Materials (ARCI), Hyderabad 500 005, A.P., India
G. Sundararajan
Affiliation:
Center for Advanced Ceramics, International Advanced Research Centre for Powder Metallurgy and New Materials (ARCI), Hyderabad 500 005, A.P., India
S.M. Olhero
Affiliation:
Department of Ceramics and Glass Engineering, Center for Research on Ceramics and Composites (CICECO), University of Aveiro, Aveiro P-3810193, Portugal
J.M.F. Ferreira*
Affiliation:
Department of Ceramics and Glass Engineering, Center for Research on Ceramics and Composites (CICECO), University of Aveiro, Aveiro P-3810193, Portugal
*
a)Address all correspondence to this author. e-mail: jmf@ua.pt
Get access

Abstract

Dense β-Si4Al2O2N6 and β-Si4Al2O2N6-0.5SiO2 ceramics were obtained from α-Si3N4, α-Al2O3, AlN, and Y2O3 upon sintering green bodies consolidated by aqueous gel casting. For comparison purposes, a β-Si4Al2O2N6 was also prepared by the conventional dry-powder processing route. In the case of gel-cast β-Si4Al2O2N6, the as-purchased AlN powder was treated with H3PO4 and Al(H2PO4)3 prior to use along with α-Si3N4, α-Al2O3, and Y2O3. The gel-cast β-Si4Al2O2N6 exhibited superior hardness (1423 ± 6 Hv), fracture toughness (3.95 ± 0.3 MPa⋅m1/2), and coefficient of thermal expansion (CTE) (3.798 × 10−6/°C between 30 and 1000 °C) in comparison to the ceramic consolidated by conventional dry pressing, which exhibited only 1317 ± 5 Hv, 3.30 ± 0.2 MPa⋅m1/2, and 3.532 × 10−6/°C between 30 and 700 °C. The in situ-generated ∼9 wt% SiO2 has considerably reduced the dielectric constant and CTE of β-Si4Al2O2N6 from 7.30 to 6.32 and from 3.798 × 10−6/°C to 3.519 × 10−6/°C, respectively. The loss tangent property of the investigated materials was little influenced by the variation of chemical composition and processing route.

Keywords

CastingCompositeDielectric properties
Type
Articles
Information
Journal of Materials Research , Volume 23 , Issue 9 , September 2008 , pp. 2305 - 2311
Copyright
Copyright © Materials Research Society 2008

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1Oyama, Y.Kamagaito, O.: Solid solubility of some oxides in Si3N4. Jpn. J. Appl. Phys. 10, 1637 1971CrossRefGoogle Scholar
2Jack, K.H.Wilson, W.I.: Ceramics based on the Si–Al–O–N and related systems. Nature (London) 238, 28 1977Google Scholar
3Jack, K.H.: Review: SiAlONs and related nitrogen ceramics. J. Mater. Sci. 11, 1135 1976CrossRefGoogle Scholar
4Jack, K.H.: SiAlONs: A Study in Materials Development, Non-Oxide Technical and Engineering Ceramics edited by S. Hampshire Elsevier Applied Science Publishers Ltd. Barking, Essex, England 1986 1–30Google Scholar
5Brown, I.W.M., Barris, G.C., Bowden, M.E., Mackenzie, K.J.D., Sheppard, C.M.White, G.V.: Synthesis, densification, and properties of SiAlON bodies and composites in SiAlONs edited by K. Komeya, M. Mitomo, and Y.B. Cheng Key Engineering Materials, Trans Tech Publications Ltd. Enfield, NH 2001Google Scholar
6Janney, M.A., Walls, C.A., Kupp, D.M.Kirby, K.W.: Gelcasting SiAlON radomes. Am. Ceram. Soc. Bull. 83, 9201 2004Google Scholar
7Kirby, K.W., Jankiewicz, A.T., Janney, M.A., Walls, C.Kupp, D.: Gelcasting of GD-1 ceramic radomes in Proceedings of the 8th DoD Electromagnetic Windows Symposium, U.S. Air Force Academy, Colorado Springs, CO, April 24–27, 2000, pp. 287–295 (2000),Google Scholar
8Kirby, K.W., Jankiewicz, A.T., Lowell, R.F.Hallse, R.L.: Near net shape fabrication of ceramic radomes. U.S. Patent No. 6,083,452, July 4, 2000Google Scholar
9Kirby, K.W., Jankiewcz, A., Kupp, D., Walls, C.Janney, M.: Gelcasting of ceramic radomes in the Si3N4–Al2O3–AlN–SiO2 system. Mater. Technol. Adv. Perf. Mater. 16(3), 187 2001Google Scholar
10Izhevskiy, V.A., Genova, L.A., Bressiani, J.C.Aldinger, F.: Progress in SiAlON ceramics. J. Eur. Ceram. Soc. 20, 2275 2000 and references thereinCrossRefGoogle Scholar
11Yang, J.F., Zhang, G.J., She, J.H., Ohji, T.Kanzaki, S.: Improvement of mechanical properties and corrosion resistance of porous β-SiAlON ceramics by low Y2O3 additions. J. Am. Ceram. Soc. 87(9), 1714 2004CrossRefGoogle Scholar
12Xu, X.Ferreira, J.M.F.: Temperature-induced gelation of concentrated SiAlON suspensions. J. Am. Ceram. Soc. 88(3), 593 2005CrossRefGoogle Scholar
13Xu, X., Oliveira, M.I.L.L., Renli, F.Ferreira, J.M.F.: Effect of dispersant on the rheological properties and slip casting of concentrated SiAlON precursor suspensions. J. Eur. Ceram. Soc. 23(9), 1525 2003CrossRefGoogle Scholar
14Stedman, S.J., Evans, J.R.G., Brook, R.J.Hoffmann, M.J.: Anisotropic sintering shrinkage in injection moulding composite ceramics. J. Eur. Ceram. Soc. 11(6), 523 1993CrossRefGoogle Scholar
15Ganesh, I., Thiyagarajan, N., Jana, D.C., Barick, P., Sundararajan, G.Ferreira, J.M.F.: Dense β-SiAlONs consolidated by a modified hydrolysis assisted solidification route. J. Eur. Ceram. Soc. 28(4), 879 2008CrossRefGoogle Scholar
16Kosmac, T., Novak, S.Sajko, M.: Hydrolysis-assisted solidification (HAS): A new setting concept for ceramic net-shaping. J. Eur. Ceram. Soc. 17, 427 1997CrossRefGoogle Scholar
17Novak, S., Kosmac, T., Krnel, K.Draz, G.: Principles of the hydrolysis assisted solidification (HAS) process for forming ceramic bodies from aqueous suspension. J. Eur. Ceram. Soc. 22, 289 2002CrossRefGoogle Scholar
18Janney, M.A., Nunn, S.D., Walls, C.A., Omatete, O.O., Ogle, R.B., Kirby, G.H.McMillan, A.D.: Gelcasting in The Handbook of Ceramic Engineering edited by M.N. Rahman Marcel Dekker New York 1998 1–15Google Scholar
19Ganesh, I., Thiyagarajan, N., Jana, D.C., Mahajan, Y.R.Sundararajan, G.: Influence of chemical composition and Y2O3 on sinterability, dielectric constant and CTE of β-SiAlON. J. Am. Ceram. Soc. 91(1), 115 2008CrossRefGoogle Scholar
20Gilde, G., Patel, P., Hubbard, C., Pothier, B., Hynes, T., Croft, W.Wells, J.: SiON low dielectric constant ceramic nanocomposite. U.S. Patent No. 5,677,252, Oct. 14, 1997Google Scholar
21Uenishi, F.M., Hashizume, K.N.Y.Yokote, T.: Aluminum nitride powder having improved water resistance. U.S. Patent No. 4,923,689, May 8, 1990Google Scholar
22Krnel, K.Kosmac, T.: Protection of AlN powder against hydrolysis using aluminum di-hydrogen phosphate. J. Eur. Ceram. Soc. 21, 2075 2001CrossRefGoogle Scholar
23Olhero, S.M., Novak, S., Oliveira, M., Krnel, K., Kosmac, T.Ferreira, J.M.F.: A thermochemical surface treatment of AlN powder for the aqueous processing of AlN ceramics. J. Mater. Res. 19, 746 2004CrossRefGoogle Scholar
24Ganesh, I., Jana, D.C., Shaik, S.Thiyagarajan, N.: An aqueous gelcasting process for sintered silicon carbide ceramics. J. Am. Ceram. Soc 89, 3056 2006CrossRefGoogle Scholar
25Klug, H.P.Alexander, L.E.: X-ray diffraction procedure for polycrystalline and amorphous materials.J. Appl. Crystallogr.,8, 573 1975CrossRefGoogle Scholar
26Ganesh, I., Teja, K.A., Thiyagarajan, N., Johnson, R.Reddy, B.M.: Formation and densification behavior of magnesium aluminate spinel: The influence of CaO and moisture in the precursors. J. Am. Ceram. Soc. 88(10), 2752 2005CrossRefGoogle Scholar
27Ekberg, I-L., Lundberg, R., Warren, R.Carlson, R.: Brittle Matrix Composites 2 edited by A.M. Brandt and I.H. Marshall Elsevier Applied Science New York 1998Google Scholar
28Nicolson, A.M.Ross, G.F.: Measurement of the intrinsic properties of materials by time domain techniques. IEEE Trans. Instrum. Meas. IM-19, 377 1970CrossRefGoogle Scholar
29Hampshire, S., Park, H.K., Thompson, D.P.Jack, H.K.: α′-SiAlON. Nature 274, 880 1978CrossRefGoogle Scholar
30Pettersson, P., Shen, Z., Johnsson, M.Nygren, M.: Thermal shock properties of β-SiAlON ceramics. J. Eur. Ceram. Soc 22, 1357 2002CrossRefGoogle Scholar
31Buchanan, R.C.: Properties of ceramic insulators in Ceramic Materials for Electronics: Processing, Properties and Applications 2nd ed. revised and expanded, edited by R.C. Buchanan Marcel Dekker Inc. New York 1991 Chap. 1Google Scholar
32Raghavan, V.: Dielectric materials in Materials Science and Engineering—A First Course 4th ed.Prentice-Hall of India (P) Ltd. New Delhi 1998 Chap. 17Google Scholar
33Dean, J.A.: (ed.) Lange’s Handbook of Chemistry 12th ed.McGraw-Hill New York 1979Google Scholar
34Lide, D.R.: (ed.) CRC Handbook of Chemistry and Physics 73rd ed.CRC Press London 1993Google Scholar