Abstract
Aluminum nitride crystals in the form of six‐sided prismatic needles, up to 0.5 mm in diameter by 30 mm long, and thin plates, 2–3 mm in diameter, have been prepared by vaporization of aluminum in a nitrogen atmosphere at temperatures ranging from about 1800° to 2000 °C, and the properties of the crystals determined. Also, an aluminum nitride body, having a density of 98% of theoretical, has been prepared by hot pressing the fine powder, and a study made of its properties.