Seed-growth-free IIa type diamond large single crystal synthesis block and preparation method thereof

• Main Authors: SHEN QICHAO, TANG JINGJING, SHEN JIANMIN
• Format: Patent
• Language: Chinese; English
• Published: 13.05.2022
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

The invention discloses a synthesis block for seed-growth-free IIa type diamond large single crystals and a preparation method thereof, the synthesis block provided by the invention can lock a carbon source in a catalyst accessory (synthesis column) by adopting a point-shaped catalyst, can avoid consumption of the carbon source by self-nucleation at other positions, and can stably cultivate large single-crystal IIa type diamond. And the growth cycle of the diamond is short (as short as 3 days), the one-time cultivation yield is high, the cultivated diamond is large-single-crystal colorless and transparent IIa type diamond with a higher additional value, and the economic benefit is high. 本发明公开一种免晶种生长IIa型金刚石大单晶的合成块及其制备方法，本发明的合成块可实现采用"点状触媒"，将碳源锁定在触媒附件(合成柱)内，可避免在其他位置自成核消耗碳源，可稳定培育出大单晶体的IIa型金刚石，且金刚石生长周期短(可短至3天)，一次性培育产量多，所培育出的金刚石为大单晶的无色透明的，附加值更高的IIa型金刚石，经济效益高。