Year: 2005
Type: article
Abstract: Large high-quality type-II a diamond crystals in size of about 4.0 mm have been grown under the condition of 5.5 GPa and 1200–1300 degrees C by using the temperature gradient method in a domestic cubic anvil high-pressure apparatus. The Fe 55 Co 16 Ni 25 alloy (KOV) is used as the solvent metal, and Ti with the content 1.5 wt.% of the solvent metal is selected as the nitrogen getter to reduce the impurity of nitrogen in the diamond crystal. To avoid the impurities and cave in the crystal, the growth rate of the initial stage of the growing process is controlled within 0.45 mg/h and the ring carbon source of the size Φ8 mm–Φ6 mm × 3 mm is used to grow large diamond crystals.
Source: Chinese Physics Letters
Authors: Wang Xian-Cheng, Ma Hong-An, Zang Chuan-Yi, Tian Yu, Li Shang-Sheng, Jia Xiao-Peng
Institutions: Jilin University, Henan Polytechnic University
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2012260073