Synthesis and crystallization behavior of amorphous boron nitride

Metin Omek, Chawon Hwang, Vladislav Domnich, Steven L. Miller, Willam E. Mayo, Richard Haber

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Amorphous Boron Nitride (a-BN) is an important starting material for the synthesis of cubic BN(o-BN). However, information on the synthesis methods and the characteristics of a-BN are not sufficiently discussed in the literature. The purpose of this study is to understand the conversion of precursor chemicals to a-BN and to illustrate the effects of starting material and heat treatment conditions on the formation and characteristics of a-BN. Boric acid (H3BO3) and melamine (C3H6N5) were used as starting materials and the starting composition range was selected to be between 1:1 and 6:1 molar ratios (HBOi^HsNe). Two-step solid state reaction method was applied for the synthesis of a-BN: First heat-treatment at 200°C for 2 hours in air and the second heat treatment at selected temperatures for 3 hours in N2 gas atmosphere. To determine the condition region for the synthesis of a-BN, synthesized powders were characterized using X-ray diffraction, Raman and FTIR spectroscopies which showed different sensitivity for detecting crystalline phase in the powders. The condition regions for the synthesis of a-BN were determined to be between 400°C and 600°C for the composition range of 1:1 and 1.5:1. Crystallization was observed at lower temperatures for the samples with higher H3BO3 content in the H3BO3-C3H6N5 system.

Original languageEnglish (US)
Title of host publicationAdvances in Ceramic Armor XI - A Collection of Papers Presented at the 39th International Conference on Advanced Ceramics and Composites
EditorsJerry C. LaSalvia
PublisherAmerican Ceramic Society
Pages75-81
Number of pages7
Edition4
ISBN (Print)9781119040439
Publication statusPublished - Jan 1 2016
Event13th Armor Ceramics Symposium - 39th International Conference on Advanced Ceramics and Composites, ICACC 2015 - Daytona Beach, United States
Duration: Jan 25 2015Jan 30 2015

Publication series

NameCeramic Engineering and Science Proceedings
Number4
Volume36
ISSN (Print)0196-6219

Other

Other13th Armor Ceramics Symposium - 39th International Conference on Advanced Ceramics and Composites, ICACC 2015
CountryUnited States
CityDaytona Beach
Period1/25/151/30/15

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All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

Cite this

Omek, M., Hwang, C., Domnich, V., Miller, S. L., Mayo, W. E., & Haber, R. (2016). Synthesis and crystallization behavior of amorphous boron nitride. In J. C. LaSalvia (Ed.), Advances in Ceramic Armor XI - A Collection of Papers Presented at the 39th International Conference on Advanced Ceramics and Composites (4 ed., pp. 75-81). (Ceramic Engineering and Science Proceedings; Vol. 36, No. 4). American Ceramic Society.