Effects of MgO and La2O3 Composite Additives on Microstructure of Nano-Microcrystalline Alumina Ceramics

Abstract

Abstract: The nanocrystalline alumina abrasive, with its excellent versatility and high-precision grinding capability, has become a cost-effective choice for various applications in fields such as mechanical manufacturing, bearings, molds and automobiles. In this study, nano microcrystalline alumina was synthesized by sol-gel process, with boehmite (γ-AlOOH) as raw material, MgO and La₂O₃ as additives. The effects of MgO and La₂O₃ additives on the phase transformation, phase composition, microstructure and mechanical properties of nanocrystalline alumina were investigated by differential scanning calorimetry, X-ray diffraction, scanning electron microscopy and ab initio molecular dynamics simulation. The results show that MgO and La₂O₃ composite additives can reduce the transformation temperature of alumina from the intermediate phase θ-Al₂O₃ to α-Al₂O₃ from 1 257 ℃ to 1 105 ℃, lower the densification temperature of the material from 1 600 ℃ to1 350 ℃, and reduce the grain size of nanocrystalline alumina from 1.04 mm to 120 nm, thus realizing the low-temperature dense sintering.

Key words: nano-microcrystalline, Al₂O₃, MgO, La₂O₃, sol-gel, additive, low-temperature sintering

CLC Number:

TB321

LI Hui, ZHANG Jinping, GAO Jingxia, WANG Erping, ZHANG Yangyang. Effects of MgO and La₂O₃ Composite Additives on Microstructure of Nano-Microcrystalline Alumina Ceramics[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(1): 339-346.

References

[1] 康会峰, 黄新春, 牛亚洲. 微晶刚玉磨料磨削性能研究[J]. 机械设计与制造, 2016(1): 144-147+150.
KANG H F, HUANG X C, NIU Y Z. The research on the properties of microcrystalline corundum abrasives[J]. Machinery Design & Manufacture, 2016(1): 144-147+150 (in Chinese).
[2] 边华英, 陈虎, 王焱, 等. 焙烧温度对微晶陶瓷磨料晶粒度的影响[J]. 中国陶瓷, 2020, 56(11): 33-38.
BIAN H Y, CHEN H, WANG Y, et al. Influence of calcination temperature on grain size of microcrystalline alumina abrasive[J]. China Ceramics, 2020, 56(11): 33-38 (in Chinese).
[3] 边华英, 王学涛, 尹青亚, 等. 微晶氧化铝基烧结磨料的制备研究[J]. 河南科学, 2018, 36(7): 1070-1074.
BIAN H Y, WANG X T, YIN Q Y, et al. Preparation of sintered microcrystalline ceramic alumina abrasive[J]. Henan Science, 2018, 36(7): 1070-1074 (in Chinese).
[4] KUMAGAI M, MESSING G L. Controlled transformation and sintering of a boehmite sol-gel by α-alumina seeding[J]. Journal of the American Ceramic Society, 1985, 68(9): 500-505.
[5] AL-AMIN M, MUMU H T, SARKER S, et al. Effects of sintering temperature and zirconia content on the mechanical and microstructural properties of MgO, TiO₂ and CeO₂ doped alumina-zirconia (ZTA) ceramic[J]. Journal of the Korean Ceramic Society, 2023, 60(1): 141-154.
[6] BAE S I, BAIK S. Critical concentration of MgO for the prevention of abnormal grain growth in alumina[J]. Journal of the American Ceramic Society, 1994, 77(10): 2499-2504.
[7] CHEN C R, MA Q, HE C, et al. Effects of MgO and Fe₂O₃ additives on the microstructure and fracture properties of aluminium titanate flexible ceramics[J]. Ceramics International, 2023, 49(12): 19806-19816.
[8] PARK C W, YOON D Y. Effects of SiO₂, CaO₂, and MgO additions on the grain growth of alumina[J]. Journal of the American Ceramic Society, 2000, 83(10): 2605-2609.
[9] HASSANZADEH-TABRIZI S A, TAHERI-NASSAJ E. Sol-gel synthesis and characterization of Al₂O₃-CeO₂ composite nanopowder[J]. Journal of Alloys and Compounds, 2010, 494(1-2): 289-294.
[10] HEVELING J. La-doped alumina, lanthanum aluminate, lanthanum hexaaluminate, and related compounds: a review covering synthesis, structure, and practical importance[J]. Industrial & Engineering Chemistry Research, 2023, 62(6): 2353-2386.
[11] TAAVONI-GILAN A, TAHERI-NASSAJ E, AKHONDI H. The effect of zirconia content on properties of Al₂O₃-ZrO₂ (Y₂O₃) composite nanopowders synthesized by aqueous sol-gel method[J]. Journal of Non-Crystalline Solids, 2009, 355(4/5): 311-316.
[12] LI H, LU H X, WANG S, et al. Preparation of a nano-sized α-Al₂O₃ powder from a supersaturated sodium aluminate solution[J]. Ceramics International, 2009, 35(2): 901-904.
[13] 李海涛, 樊利存, 程浩艳, 等. 助烧剂对微晶Al₂O₃刚玉磨料结构与性能的影响[J]. 河南科技大学学报(自然科学版), 2023, 44(3): 1-6+14.
LI H T, FAN L C, CHENG H Y, et al. Effect of sintering aids on structure and properties of microcrystalline Al₂O₃ corundum abrasive[J]. Journal of Henan University of Science and Technology (Natural Science), 2023, 44(3): 1-6+14 (in Chinese).
[14] 赵炯, 李专, 邹凌峰, 等. 溶胶-凝胶法结合二步烧结制备陶瓷刚玉磨料的微结构控制及晶粒细化机理[J]. 粉末冶金材料科学与工程, 2022, 27(3): 319-326.
ZHAO J, LI Z, ZOU L F, et al. Microstructure control and grain refinement mechanism of ceramic corundum abrasives prepared by sol-gel combined with two step sintering process[J]. Materials Science and Engineering of Powder Metallurgy, 2022, 27(3): 319-326 (in Chinese).
[15] 黄璐. 微晶陶瓷刚玉磨料的制备与性能及微观形貌研究[D]. 天津: 天津大学, 2019: 25-26.
HUANG L. Study on preparation, properties and micro-morphology of microcrystalline ceramic corundum abrasive[D]. Tianjin: Tianjin University, 2019: 25-26 (in Chinese).
[16] MA H J, JUNG W K, BAEK C, et al. Influence of microstructure control on optical and mechanical properties of infrared transparent Y₂O₃-MgO nanocomposite[J]. Journal of the European Ceramic Society, 2017, 37(15): 4902-4911.
[17] 陈朋, 邹斌, 薛锴. 微波烧结工艺对Sialon陶瓷刀具材料力学性能的影响[J]. 硅酸盐学报, 2022, 50(12): 3236-3242.
CHEN P, ZOU B, XUE K. Effect of microwave sintering process on mechanical properties of Sialon ceramic tool materials[J]. Journal of the Chinese Ceramic Society, 2022, 50(12): 3236-3242 (in Chinese).
[18] HUANG L, YAO W L, LIU J, et al. Spark plasma sintering and mechanical behavior of magnesia-yttria (50: 50 vol.%) nanocomposites[J]. Scripta Materialia, 2014, 75: 18-21.
[19] XIE J X, MAO X J, LI X K, et al. Influence of moisture absorption on the synthesis and properties of Y₂O₃-MgO nanocomposites[J]. Ceramics International, 2017, 43(1): 40-44.
[20] CHEN I W, WANG X H. Sintering dense nanocrystalline ceramics without final-stage grain growth[J]. Nature, 2000, 404(6774): 168-171.
[21] BRARD N, PETIT J, EMERY N, et al. Control of the nanostructure of MgO-Y₂O₃ composite ceramics using two-step sintering for high temperature mid infrared window applications[J]. Ceramics International, 2023, 49(11): 18187-18194.
[22] 孙春晖, 朱玲玲, 李赛, 等. 前驱体预处理及卤化铵添加剂对α-氧化铝微粉颗粒形貌的影响[J]. 无机盐工业, 2018, 50(9): 19-23.
SUN C H, ZHU L L, LI S, et al. Effect of pretreated precursor and halogenated ammonia additives on the morphology of α-Al₂O₃ powders[J]. Inorganic Chemicals Industry, 2018, 50(9): 19-23 (in Chinese).
[23] PARK Y K, TADD E H, ZUBRIS M, et al. Size-controlled synthesis of alumina nanoparticles from aluminum alkoxides[J]. Materials Research Bulletin, 2005, 40(9): 1506-1512.
[24] 唐琛, 张崇才, 盛智勇, 等. 超细WC-TiC-Co硬质合金粉体制备及其成型特性[J]. 西华大学学报(自然科学版), 2008, 27(3): 58-60.
TANG C, ZHANG C C, SHENG Z Y, et al. Preparation and forming characteristics of ultrafine WC-TiC-Co cemented carbide powder[J]. Journal of Xihua University (Natural Science Edition), 2008, 27(3): 58-60 (in Chinese).
[25] BERRY K A, HARMER M P. Effect of MgO solute on microstructure development in Al₂O₃[J]. Journal of the American Ceramic Society, 1986, 69(2): 143-149.

Effects of MgO and La₂O₃ Composite Additives on Microstructure of Nano-Microcrystalline Alumina Ceramics

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