Synthesis of AlN particles by chemical route for thermal interface material

¹Convergence research center for development of mineral resources, Korea Institute of Geoscience and Mineral Resources, 124, Gwahakro, Yuseonggu, Daejeon, 34132, Republic of Korea

²Powder & Ceramics Division, Korea Institute of Materials Science, 797, Changwondaero, Seongsangu, Changwon, Gyeongnam, 51508, Republic of Korea

Adv. Mater. Lett., 2017, 8 (9), pp 939-943

DOI: 10.5185/amlett.2017.1666

Publication Date (Web): Jun 04, 2017

Copyright © IAAM-VBRI Press

E-mail: dskim69@kigam.re.kr

Abstract

Aluminum urea chloride complex was easily synthesized by microwave irradiation from mixed solution and it was used as a precursor for further process. The complexes have proved that urea molecules constructed a coordination sphere around the aluminum atom and formed a stable structure with microwave irradiation. Molar ratio between urea and aluminum chloride was an important factor for the synthesis of AlN particles. After microwave irradiation to the solution with molar ratio (urea/Aluminum chloride) above 6, AlN particles without Al₂O₃ were formed from aluminum urea chloride by heat treatment at 1000 in nitrogen atmosphere. AlN particles with low oxygen content of 0.85 wt% were successfully synthesized at 1700 under N₂ atmosphere in the molar ratio of 6.

Keywords

AlN, urea route, microwave irradiation, nitridation