Fig. 4: Production process of bulk KTiOPO4 crystal by hydrothermal method.
From: Hydrothermal growth of KTiOPO4 crystal for electro-optical application
Hydrothermal method is the process of crystal growth under hydrothermal conditions occurs at high regimes and pressures. Therefore, this process leads in special thick-walled vessels – autoclaves, made of special high-strength corrosion and heat-resistant steel. The typical hydrothermal growth process of KTP crystal includes nine steps, starting with the preparation work of nutrients, seed, liner, mineralizers, and autoclave etc. (step 1–5), and finally taking out the grown crystals (step 9) after autoclave sealing, heating and crystal growth (step 6–8)
