Thermal Behavior of TiO_2-𝑥N_𝑥 Nanostructured Powder

Table 2

Characteristics of radon permeability of TiO₂ and TiO_2-xN_x evaluated from DSA results.

Sample notation and preparation	Radon permeability characteristics
	Temperature range 20–450^°C
	𝐷0 (cm^2/s)	𝑄𝐷 (kJ/mol)
Sample A: TiO2 prepared from anatase ST 01 Ishihara Ltd. by heating at 550^°C for 3 h in air	8.4⋅10^−10	64±5
Sample B: TiO2-xNx prepared by heating sample A in a flow of NH3 at 575^°C for 3 h	1.8⋅10^−11	42±5