DOI: 10.3724/SP.J.1077.2014.13559

Journal of Inorganic Materials (无机材料学报) 2014/29:7 PP.706-710

Controllable Synthesis of One-dimensional β-SiAlON Materials

β-SiAlON whiskers, belts and rods were prepared at 1650–1850 K in N2 atmosphere, respectively, by using Si, Al and Al2O3 powders as raw materials which were pressed into cuboid and burying in Si3N4 grains. The effects of growth conditions on the controllable synthesis of one-dimensional β-SiAlON preparation were investigated in detail, and their growth mechanisms were explored according to the thermodynamic calculations. The results showed that one-dimensional β-SiAlON could be controllably synthesized only by adjusting sintering temperatures. Specifically, β-SiAlON whiskers with 200–400 nm in diameter and 100–1000 in aspect ratio could be obtained at 1650 K. Increasing growth temperature from 1700 K to 1800 K, β-SiAlON belts with thickness of about 200 nm, width of 1-4 μm and length-width ratio in the range of 10-20, were produced. Further increasing temperature to 1850 K, β-Sialon rods were synthesized accordingly. Vapor-solid (VS) growth mechanism was put forward to elucidate the growth of one-dimensional β-SiAlON based on their thermodynamic calculations and microstructures.

Key words:one-dimensional β-SiAlON material,controllable synthesis,growth mechanisms,thermodynamics

ReleaseDate:2016-07-11 11:25:02

[1] 李 武主编. 无机晶须. 北京: 化学工业出版社, 2005: 1-33.

[2] DONG P L, WANG X D, ZHANG M, et al. Conductivity properties of β-SiAlON ceramics. Science China Technological Sciences, 2012, 55(9): 2409-2415.

[3] CHEN I W, ROSENFLANZ A. A tough SiAlON ceramic based on α-Si3N4 with a whisker-like microstructure. Nature, 1997, 389(6652): 701-704.

[4] GUNN D A. A theoretical evaluation of the stability of sialon-bonded silicon carbide in the blast furnace environment. J. Eur. Ceram. Soc., 1993, 11(1): 35-41.

[5] RLEY F L. Silicon nitride and related materials. J. Am. Ceram. Soc., 2000, 83(2): 245-265.

[6] XIE R J, HINTZEN H T. Optical properties of (oxy) nitride materials: a review. J. Am. Ceram. Soc., 2013, 96(3): 665-687.

[7] CHUNG J H, RYU J H. Photoluminescence and LED application of β-SiAlON: Eu2+ green phosphor. Ceram. Int., 2012, 38(6): 4601-4606.

[8] CHEN Z. Synthesis and characterisation of β-SiAlON whiskers prepared from the carbothermal reaction of silica fume and α-Al2O3. J. Mater. Sci., 1993, 28(22): 6021-6025.

[9] LIU G H, CHEN K X, ZHOU H P, et al. Formation of β-SiAlON micropalings consisting of nanorods during combustion synthesis. Scripta Mater, 2006, 55(10): 935-938.

[10] DICKON H L NG, TERESA L Y CHEUNG, KWONG F L, et al. Fabrication of single crystalline β′-SiAlON nanowires. Mater. Lett., 2008, 62(8/9): 1349-1352.

[11] YU J, UENO S, HIRAGUSHI K, et al. Synthesis of β-SiAlON whiskers from pyrophyllite. J. Ceram. Soc. Jpn., 1997, 105(1225): 821-823.

[12] 董鹏莉. β-SiAlON及其复相材料制备与性能的基础研究. 北京: 北京科技大学博士学位论文, 2008.

[13] LIU G H, CHEN K X, ZHOU H P, et al. Preparation of Y-SiAlON rod-like crystals and whiskers by combustion synthesis. Mater. Lett., 2005, 59(29/30): 3955-3958.

[14] DONG P L, WANG X D, ZHANG M, et al. Thermodynamic study and syntheses of β-SiAlON ceramics. Sci. China Ser. E-Tech. Sci., 2009, 52(11): 3122-3127.

[15] YUE CHANG-SHENG, GUO MING, ZHANG MEI, et al. Controllable synthesis of high-purity β-SiAlON powder. Journal of Inorganic Materials, 2009, 24(6): 1163-1167.

[16] 岳昌盛, 彭 犇, 郭 敏, 等. β-SiAlON晶须的诱导合成和生长机制研究. 人工晶体学报, 2011, 40(5): 287-293.

[17] 岳昌盛. SiAlON的可控合成、性能与工业化生产研究. 北京: 北京科技大学博士学位论文, 2010.

[18] 梁英教, 车荫昌主编. 无机热力学数据手册. 沈阳: 东北大学出版社, 1993.

[19] 甄 强, 王福明, 李文超. 赛隆(SiAlON)体系热力学性质评估与预报. 稀有金属, 1999, 23(4): 254-257.