Application of Doping Ceramics via Infiltration on Translucent Alumina Ceramics

doi:10.3724/SP.J.1077.2013.12255

Abstract

Abstract:

The feasibility to homogeneously incorporate additives and fabricate translucent alumina ceramics via liquid precursor infiltration technique was substantiated. Pre-sintered alumina compacts with various thickness values were infiltrated with aqueous yttrium nitrate solutions of different concentrations under various conditions. Line-scanning result of yttrium along the sample depth direction was investigated to characterize the doping homogeneity. It is found that better distribution homogeneity and more stringent control of a desired amount of dopants can be realized as the sample thickness and the solution concentration are decreased. By assuming all pores are open and completely saturated, the theoretical model is proposed to predict the amount of incorporated species by infiltration. Finally, translucent alumina ceramics were fabricated. Compared with ball-milling prepared counterparts, samples with improved microstructure and enhanced optical properties are achieved by infiltration.

Key words: infiltration, translucent alumina ceramics, optical properties, doping, homogeneity

CLC Number:

TQ174

LIU Guan-Wei, XIE Zhi-Peng, WU Yin. Application of Doping Ceramics via Infiltration on Translucent Alumina Ceramics[J]. Journal of Inorganic Materials, 2013, 28(4): 375-380.

Figures/Tables 10

Fig. 1 Exprimental and theoretical weight increase of green bodies infiltrated by Y(NO3)3 solutions with different concentrations

Fig. 2 Rheology of Y(NO3)3 solutions with different concentrations

Fig.3 Y element distribution profile of samples Q1-Q4

Fig. 4 Degree of pore saturation during infiltration for samples with different green body thickness values

Fig. 5 Line-scanning result of Y element in sample (green body thickness 1.20 mm) infiltrated with 2.0 mol/L Y(NO3)3 solution

Fig. 6 Samples prepared by infiltration: 5M (left), 5M5Y (right)

Fig. 7 Microstructure images of the specimens 3M(a), 5M(b), 10M(c) and 5M-C(d)

Fig. 8 In-line transmission of the specimens 3M, 5M, 10M and 5M-C

Fig. 9 Microstructure of the specimens 3M3Y(a), 5M5Y(b), 10M10Y(c) and 5M5Y-C(d)

Fig. 10 In-line transmission of the specimens 3M3Y, 5M5Y, 10M10Y and 5M5Y-C

References 22

[1]	Green D J. Critical microstructures for microcracking in Al2O3-ZrO2 composites. Journal of the American Ceramic Society, 1982, 65(12): 610-614.
[2]	Tian Z B, Wang X H, Shu L K, et al. Preparation of nano BaTiO3- based ceramics for multilayer ceramic capacitor application by chemical coating method. Journal of the American Ceramic Society, 2009, 92(4): 830-833.
[3]	Rao P G, Iwasa M, Tanaka T, et al. Preparation and mechanical properties of Al2O3-15wt%ZrO2 composites. Scripta Materialia, 2003, 48(4): 437-441.
[4]	Lange F F, Hirlinger M M. Hindrance of grain-growth in Al2O3 by ZrO2 inclusions. Journal of the American Ceramic Society, 1984, 67(3): 164-168.
[5]	Liu G W, Xie Z P, Wu Y. Research progress of manipulating composition and properties of ceramics via liquid precursor infiltration technique. Journal of Inorganic Materials, 2011, 26(11): 1121-1128.
[6]	Albano M P, Scian A N. Mullite/SiAlON/alumina composites by infiltration processing. Journal of the American Ceramic Society, 1997, 80(1): 117-124.
[7]	Mogilevsky P, Kerans R J, Lee H D, et al. On densification of porous materials using precursor solutions. Journal of the American Ceramic Society, 2007, 90(10): 3073-3084.
[8]	Marple B R, Green D J. Mullite alumina particulate composites by infiltration processing. Journal of the American Ceramic Society, 1989, 72(11): 2043-2048.
[9]	Marple B R, Green D J. Graded compositions and microstructures by infiltration processing. Journal of Materials Science, 1993, 28(17): 4637-4643.
[10]	Liu G W, Xie Z P, Wu Y. Effectively inhibiting abnormal grain growth of alumina in ZTA with low-content fine-sized ZrO2 inclusions introduced by infiltration and in-situ precipitation. Journal of the American Ceramic Society, 2010, 93(12): 4001-4004.
[11]	Sato E, Carry C. Yttria doping and sintering of submicrometer-grained alpha-alumina. Journal of the American Ceramic Society, 1996, 79(8): 2156-2160.
[12]	Voytovych R, MacLaren I, Gulgun M A, et al. The effect of yttrium on densification and grain growth in alpha-alumina. Acta Materialia, 2002, 50(13): 3453-3463.
[13]	Liu G W, Xie Z P, Liu W, et al. Fabrication of translucent alumina ceramics from pre-sintered bodies infiltrated with sintering additive precursor solutions. Journal of the European Ceramic Society, 2012, 32(4): 711-715.
[14]	Glass S J, Green D J. Permeability and infiltration of partially sintered ceramics. Journal of the American Ceramic Society, 1999, 82(10): 2745-2752.
[15]	Tu W C, Lange F F. Liquid precursor infiltration processing of powder compacts .1. Kinetic studies and microstructure development. Journal of the American Ceramic Society, 1995, 78(12): 3277-3282.
[16]	Miller L, Avishai A, Kaplan W D. Solubility limit of MgO in Al2O3 at 1600℃. Journal of the American Ceramic Society, 2006, 89(1): 350-353.
[17]	Kim B K, Hong S H, Lee S H, et al. Alternative explanation for the role of magnesia in the sintering of alumina containing small amounts of a liquid phase. Journal of the American Ceramic Society, 2003, 86(4): 634-639.
[18]	Soni K K, Thompson A M, Harmer M P, et al. Solute segregation to grain boundaries in MgO-doped alumina. Applied Physics Letters, 1995, 66(21): 2795-2797.
[19]	Krell A, Blank P, Ma H W, et al. Transparent sintered corundum with high hardness and strength. Journal of the American Ceramic Society, 2003, 86(1): 12-18.
[20]	Ohji T, Jeong Y K, Choa Y H, et al. Strengthening and toughening mechanisms of ceramic nanocomposites. Journal of the American Ceramic Society, 1998, 81(6): 1453-1460.
[21]	Yamashita I, Nagayama H, Shinozaki N, et al. Toughening and strengthening of translucent alumina. Journal of the Ceramic Society of Japan, 2009, 117(1369): 1052-1054.
[22]	谢志鹏, 刘冠伟. 通过浸渗坯体引入烧结助剂制备半透明氧化铝陶瓷的方法. 中国, C04B35/10, CN102093037A, 2010. 12. 9.