Fig. 6
From: Porous hydroxyapatite – β-tricalcium phosphate ceramics produced from a rapid sol-gel process

Nitrogen adsorption/desorption isotherms and BET specific surface area values for Ac10 and Nit10 heated to 400 °C (a-b) and 700 °C (c-d). The insets show the single point BET isotherms.