Preparation of Whisker-reinforced high thermal conductive AlN ceramic substance.

晶须增强高导热AlN陶瓷材料的制备

• 批准号: 12650667
• 负责人: HOTTA Noriyasu
• 金额: $ 2.43万
• 依托单位: Niigata University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12650667/
• 关键词: Aluminum nitride; Whisker; Fine powder; Synthesis; Sintering; Rein-forced ceramics; High thermal conductivity; Ceramic substance

Fine aluminum nitride (AlN) powder and pure AlN whiskers were synthesized by ffloating-type fluidized-bed nitridation (continuous direct nitridation) of ultra-pure aluminum(Al) powder (99.99 purity, 20 μm of diameter). Synthesis mechanism of the AlN nitrides and their properties were investigated. Following, The AlN whiskers reinforced composite materials were prepared, and these properties were measured.High sinterable, pure and fine AlN (about 0.2 μm of diameter) powders were synthesized by the explosive nitridation of Al powder, and then pure AlN whiskers were produced on the reactor wall. White AlN whiskers having rough surface were synthesized by nitridatiuon of Al particles and nitrogen (N_2) gas. On the other hand, Transparent AlN whiskers having smooth surface were produced by using N_2-NH_3 gas mixture as a reactant gas. The white AlN whiskers having rough surface had good sinterability, however, the whiskers revealed poor resistance to oxidation and water. Transparent AlN whiskers having smooth surface had poor sinterability, and revealed high resistance to oxidation and water.Transparent, dense and high strength AlN ceraic was obtained by hot-pressing of the white AlN whiskers at 1900 for 120 min under 30 MPa in N_2 atmosphere. The thermal expansion coefficient of whisker-resin composite material was 3.44X10-5/K, which was similar to the comm on metals. The thermal conductivity of ones was 7.0 W/mK. The value was 35 times as much as that of ther resin. Whisker-powder composite AlN ceramic having high thermal conductivity of 157 W/mK, was produced by hot-pressing at 1900 for 120 min under 30 MPa in N_2 atmosphere.

氮化铝（ALN）超色铝（AL）粉末（99.99纯度，直径20μm）。细胞和细胞（大约0.2μm的直径）粉末是通过Al粉末的爆炸性硝基化合成的，然后在具有粗糙表面的Aln晶须上产生纯Aln，并由ROGON（N_2）的氮气（N_2）合成。通过使用N_2-NH_3气味混合物产生具有光滑表面的Aln晶须，因为Aln晶须表面具有良好的污染物，晶须会散发出对氧化水的耐药性较差，具有透明的晶须。和水。在N_2大气中，在30 MPa下，在1900分钟以1900分钟的白色晶须的透明，浓度和高强度Aln Ceraic获得了3.44x10-5/K的热膨胀。金属上的电导率为7.0 w/mk。 N_2气氛中的30 MPA。

项目成果

N. Hotta, T. Watanabe, T. Sasamoto, C. Zhang, T .Meguro and K. Komeya: "Preparation of AlN Whiskers and Application to Composite Materials."High Temperature Matrix Composites, Edited by W. Krenkel, R. Naslan and H. Schneider. 375-380 (2001)

N.Hotta、T.Watanabe、T.Sasamoto、C.Zhang、T.Meguro 和 K.Komeya：“AlN 晶须的制备及其在复合材料中的应用”。高温基复合材料，W.Krenkel、R.Naslan 编辑

N. Hotta, M. Kanatani, R. Yozezawa, K. Yanagida, T. Tobitsuks and T. Watanabe: "Properties of AlN Powders Synthesized by Rapid Nitridation of Al Powder in Floating System."TERMEC 2003. (in press).

N. Hotta、M. Kanatani、R. Yozezawa、K. Yanagida、T. Tobitsuks 和 T. Watanabe：“在浮动系统中通过铝粉快速氮化合成的 AlN 粉末的特性”。TERMEC 2003。（印刷中）。

N. Hotta, T. Oshima, M. Kanatani, Y. Furukawa and K. Fukui: "Synthesis of Aluminum Nitride and Characterization of AlN Powder."The Materials Science Society of Japan. vol.37. 59-64 (2000)

N. Hotta、T. Oshima、M. Kanatani、Y. Furukawa 和 K. Fukui：“氮化铝的合成和 AlN 粉末的表征”。日本材料科学会。

N.Hotta, T.Watanabe, T.Sasamoto, C.Zhang, T.Meguro, K.Komeya: "Preparation of AlN Whiskers and Application to Composite Materials"High Temperature Matrix Composites (Edited by W.Krenkel, R.Naslan and H.Schneider). 375-380 (2001)

N.Hotta、T.Watanabe、T.Sasamoto、C.Zhang、T.Meguro、K.Komeya：“AlN 晶须的制备及其在复合材料中的应用”高温基复合材料（编辑：W.Krenkel、R.Naslan 和

N. Hotta, Y. Kuroda, T. Hara, K. Komeya and T. Sasamoto,: "Synthesis of aluminum nitride whiskers by reduction-nitridation of alumina-calcia Compounds and their properties."Processing and Fabrication of Advanced Materials. vol.viii. 587-593 (2000)

N. Hotta、Y. Kuroda、T. Hara、K. Komeya 和 T. Sasamoto，：“通过氧化铝-氧化钙化合物的还原氮化合成氮化铝晶须及其性能。”先进材料的加工和制造。