4 research outputs found
ΠΠ½ΠΎΠ΄ΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ Π°Π»ΡΠΌΠΈΠ½ΠΈΡ Π² Π²ΡΠ·ΠΊΠΎΠΌ ΡΠ»Π΅ΠΊΡΡΠΎΠ»ΠΈΡΠ΅ Π΄Π»Ρ ΡΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΠΎΠ΄Π½ΠΎΠΌΠ΅ΡΠ½ΡΡ ΡΠΎΡΠΎΠ½Π½ΡΡ ΠΊΡΠΈΡΡΠ°Π»Π»ΠΎΠ²
In the paper, the possibility to produce anodic aluminum oxide (AAO) featuring one-dimensional photonic crystal along the normal to the surface is shown. The AAO structure is represented by alternating layers of different porosity and is formed in a viscous electrolyte based on sulfuric acid and ethylene glycol at the periodically varying from high (1.8 mA/cm2) to low (0.4 mA/cm2) current density with a rectangular pulse shape. The pore sizes and interpore distance, pore density and porosity, thickness and period of the AAO structure have been determined. The specular reflection spectra features for single layers that make up the AAO structure and for one-dimensional photonic crystals structures consisting ofΒ 165 periods have been studied. An increase in the porosity of the upper layers of the structure due to chemical etching of the pores during the oxide growth is noted. It is shown that the invariance of the spectral position of the photonic band gap for AAO structures is achieved by a 0.1 % decrease in charge at each subsequent anodizing cycle during their formation, which leads to a decrease in the period of the structure in the lower layers, compensating for the increase in the upper layers porosity. The reflection spectra have been analyzed for the incidence angles of 10Β° and 30Β° and used to calculate the period of the structure and the effective refractive index. The effective refractive index of the single layers that make up the AAO structure is calculated using the optical FabryβPerot oscillations. For AAO with the properties of one-dimensional photonic crystal, a green color is observed at normal light incidence, and an iridescent color is observed when the angle changes. AAO can be used as a decorative coating on the housings of electronic devices (tablets, laptops, phones, etc.) and when creating design objects made of aluminum and its alloys.ΠΠΎΠΊΠ°Π·Π°Π½Π° Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡΡ ΡΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½ΠΈΡ Π°Π½ΠΎΠ΄Π½ΠΎΠ³ΠΎ ΠΎΠΊΡΠΈΠ΄Π° Π°Π»ΡΠΌΠΈΠ½ΠΈΡ (ΠΠΠ) ΡΠΎ ΡΠ²ΠΎΠΉΡΡΠ²Π°ΠΌΠΈ ΠΎΠ΄Π½ΠΎΠΌΠ΅ΡΠ½ΠΎΠ³ΠΎ ΡΠΎΡΠΎΠ½Π½ΠΎΠ³ΠΎ ΠΊΡΠΈΡΡΠ°Π»Π»Π° Π²Π΄ΠΎΠ»Ρ Π½ΠΎΡΠΌΠ°Π»ΠΈ ΠΊ ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠΈ. Π‘ΡΡΡΠΊΡΡΡΠ° ΠΠΠ ΠΏΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½Π° ΡΠ΅ΡΠ΅Π΄ΡΡΡΠΈΠΌΠΈΡΡ ΡΠ»ΠΎΡΠΌΠΈ ΡΠ°Π·Π»ΠΈΡΠ½ΠΎΠΉ ΠΏΠΎΡΠΈΡΡΠΎΡΡΠΈ ΠΈ ΡΡΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½Π° Π² Π²ΡΠ·ΠΊΠΎΠΌ ΡΠ»Π΅ΠΊΡΡΠΎΠ»ΠΈΡΠ΅ Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ ΡΠ΅ΡΠ½ΠΎΠΉ ΠΊΠΈΡΠ»ΠΎΡΡ ΠΈ ΡΡΠΈΠ»Π΅Π½Π³Π»ΠΈΠΊΠΎΠ»Ρ ΠΏΡΠΈ ΠΏΠ΅ΡΠΈΠΎΠ΄ΠΈΡΠ΅ΡΠΊΠΈ ΠΈΠ·ΠΌΠ΅Π½ΡΡΡΠ΅ΠΉΡΡ ΠΏΠ»ΠΎΡΠ½ΠΎΡΡΠΈ ΡΠΎΠΊΠ° Ρ 1,8 Π½Π° 0,4 ΠΌΠ/ΡΠΌ2 Ρ ΠΏΡΡΠΌΠΎΡΠ³ΠΎΠ»ΡΠ½ΠΎΠΉ ΡΠΎΡΠΌΠΎΠΉ ΠΈΠΌΠΏΡΠ»ΡΡΠ°. ΠΠΏΡΠ΅Π΄Π΅Π»Π΅Π½Ρ ΡΠ°Π·ΠΌΠ΅ΡΡ ΠΏΠΎΡ ΠΈ ΡΠ°ΡΡΡΠΎΡΠ½ΠΈΠ΅ ΠΌΠ΅ΠΆΠ΄Ρ Π½ΠΈΠΌΠΈ, ΠΏΠ»ΠΎΡΠ½ΠΎΡΡΡ ΠΏΠΎΡ ΠΈ ΠΏΠΎΡΠΈΡΡΠΎΡΡΡ, ΡΠΎΠ»ΡΠΈΠ½Π° ΠΈ ΠΏΠ΅ΡΠΈΠΎΠ΄ ΡΡΡΡΠΊΡΡΡΡ ΠΠΠ. ΠΠ·ΡΡΠ΅Π½Ρ ΠΎΡΠΎΠ±Π΅Π½Π½ΠΎΡΡΠΈ ΡΠΏΠ΅ΠΊΡΡΠΎΠ² Π·Π΅ΡΠΊΠ°Π»ΡΠ½ΠΎΠ³ΠΎ ΠΎΡΡΠ°ΠΆΠ΅Π½ΠΈΡ ΠΎΠ΄ΠΈΠ½ΠΎΡΠ½ΡΡ
ΡΠΎΡΡΠ°Π²Π»ΡΡΡΠΈΡ
ΡΡΡΡΠΊΡΡΡΡ ΠΠΠ ΡΠ»ΠΎΠ΅Π² ΠΈ ΡΡΡΡΠΊΡΡΡ ΠΎΠ΄Π½ΠΎΠΌΠ΅ΡΠ½ΡΡ
ΡΠΎΡΠΎΠ½Π½ΡΡ
ΠΊΡΠΈΡΡΠ°Π»Π»ΠΎΠ², ΡΡΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½Π½ΡΡ
ΠΈΠ· 165 ΠΏΠ΅ΡΠΈΠΎΠ΄ΠΎΠ², ΠΊΠ°ΠΆΠ΄ΡΠΉ ΠΈΠ· ΠΊΠΎΡΠΎΡΡΡ
ΡΠΎΠΎΡΠ²Π΅ΡΡΡΠ²ΠΎΠ²Π°Π» ΡΠΎΡΡΡ ΠΎΠΊΡΠΈΠ΄Π° ΠΏΡΠΈ ΠΏΠ»ΠΎΡΠ½ΠΎΡΡΡΡ
ΡΠΎΠΊΠ° 1,8 ΠΈ 0,4 ΠΌΠ/ΡΠΌ2. ΠΡΠΌΠ΅ΡΠ΅Π½ΠΎ ΡΠ²Π΅Π»ΠΈΡΠ΅Π½ΠΈΠ΅ ΠΏΠΎΡΠΈΡΡΠΎΡΡΠΈ Π²Π΅ΡΡ
Π½ΠΈΡ
ΡΠ»ΠΎΠ΅Π² ΡΡΡΡΠΊΡΡΡΡ Π²ΡΠ»Π΅Π΄ΡΡΠ²ΠΈΠ΅ Ρ
ΠΈΠΌΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΡΠ°Π²Π»Π΅Π½ΠΈΡ ΠΏΠΎΡ Π² ΠΏΡΠΎΡΠ΅ΡΡΠ΅ ΡΠΎΡΡΠ° ΠΎΠΊΡΠΈΠ΄Π°. ΠΠΎΠΊΠ°Π·Π°Π½ΠΎ, ΡΡΠΎ Π½Π΅ΠΈΠ·ΠΌΠ΅Π½Π½ΠΎΡΡΡ ΡΠΏΠ΅ΠΊΡΡΠ°Π»ΡΠ½ΠΎΠ³ΠΎ ΠΏΠΎΠ»ΠΎΠΆΠ΅Π½ΠΈΡ ΡΠΎΡΠΎΠ½Π½ΠΎΠΉ Π·Π°ΠΏΡΠ΅ΡΠ΅Π½Π½ΠΎΠΉ Π·ΠΎΠ½Ρ Π΄Π»Ρ ΡΡΡΡΠΊΡΡΡ ΠΠΠ Π΄ΠΎΡΡΠΈΠ³Π°Π΅ΡΡΡ ΡΠΌΠ΅Π½ΡΡΠ΅Π½ΠΈΠ΅ΠΌ Π·Π°ΡΡΠ΄Π° Π½Π° ΠΊΠ°ΠΆΠ΄ΠΎΠΌ ΠΏΠΎΡΠ»Π΅Π΄ΡΡΡΠ΅ΠΌ ΡΠΈΠΊΠ»Π΅ Π°Π½ΠΎΠ΄ΠΈΡΠΎΠ²Π°Π½ΠΈΡ Π½Π° 0,1 % ΠΏΡΠΈ ΠΈΡ
ΡΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½ΠΈΠΈ, ΡΡΠΎ ΠΏΡΠΈΠ²ΠΎΠ΄ΠΈΡ ΠΊ ΡΠΌΠ΅Π½ΡΡΠ΅Π½ΠΈΡ ΠΏΠ΅ΡΠΈΠΎΠ΄Π° ΡΡΡΡΠΊΡΡΡΡ Π² Π½ΠΈΠΆΠ½ΠΈΡ
ΡΠ»ΠΎΡΡ
, ΠΊΠΎΠΌΠΏΠ΅Π½ΡΠΈΡΡΡ ΡΠΎΡΡ ΠΏΠΎΡΠΈΡΡΠΎΡΡΠΈ Π² Π²Π΅ΡΡ
Π½ΠΈΡ
ΡΠ»ΠΎΡΡ
. Π‘ΠΏΠ΅ΠΊΡΡΡ ΠΎΡΡΠ°ΠΆΠ΅Π½ΠΈΡ ΠΏΡΠΎΠ°Π½Π°Π»ΠΈΠ·ΠΈΡΠΎΠ²Π°Π½Ρ Π΄Π»Ρ ΡΠ³Π»ΠΎΠ² ΠΏΠ°Π΄Π΅Π½ΠΈΡ 10Β° ΠΈ 30Β° ΠΈ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½Ρ Π΄Π»Ρ ΡΠ°ΡΡΠ΅ΡΠ° ΠΏΠ΅ΡΠΈΠΎΠ΄Π° ΡΡΡΡΠΊΡΡΡΡ ΠΈ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΠ³ΠΎ ΠΏΠΎΠΊΠ°Π·Π°ΡΠ΅Π»Ρ ΠΏΡΠ΅Π»ΠΎΠΌΠ»Π΅Π½ΠΈΡ. ΠΡΡΠ΅ΠΊΡΠΈΠ²Π½ΡΠΉ ΠΏΠΎΠΊΠ°Π·Π°ΡΠ΅Π»Ρ ΠΏΡΠ΅Π»ΠΎΠΌΠ»Π΅Π½ΠΈΡ ΠΎΠ΄ΠΈΠ½ΠΎΡΠ½ΡΡ
ΡΠΎΡΡΠ°Π²Π»ΡΡΡΠΈΡ
ΡΡΡΡΠΊΡΡΡΡ ΠΠΠ ΡΠ»ΠΎΠ΅Π² ΡΠ°ΡΡΡΠΈΡΠ°Π½ Ρ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ ΠΎΠΏΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΎΡΡΠΈΠ»Π»ΡΡΠΈΠΉ Π€Π°Π±ΡΠΈβΠΠ΅ΡΠΎ. ΠΠ»Ρ ΠΠΠ ΡΠΎ ΡΠ²ΠΎΠΉΡΡΠ²Π°ΠΌΠΈ ΠΎΠ΄Π½ΠΎΠΌΠ΅ΡΠ½ΠΎΠ³ΠΎ ΡΠΎΡΠΎΠ½Π½ΠΎΠ³ΠΎ ΠΊΡΠΈΡΡΠ°Π»Π»Π° ΠΏΡΠΈ Π½ΠΎΡΠΌΠ°Π»ΡΠ½ΠΎΠΌ ΠΏΠ°Π΄Π΅Π½ΠΈΠΈ ΡΠ²Π΅ΡΠ° Π½Π°Π±Π»ΡΠ΄Π°Π΅ΡΡΡ Π·Π΅Π»Π΅Π½Π°Ρ ΠΎΠΊΡΠ°ΡΠΊΠ°, Π° ΠΏΡΠΈ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΠΈ ΡΠ³Π»Π° β ΡΠ°Π΄ΡΠΆΠ½Π°Ρ. ΠΠΠ ΠΌΠΎΠΆΠ΅Ρ Π±ΡΡΡ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ ΠΊΠ°ΠΊ Π΄Π΅ΠΊΠΎΡΠ°ΡΠΈΠ²Π½ΠΎΠ΅ ΠΏΠΎΠΊΡΡΡΠΈΠ΅ Π½Π° ΠΊΠΎΡΠΏΡΡΠ°Ρ
ΡΠ»Π΅ΠΊΡΡΠΎΠ½Π½ΡΡ
ΠΏΡΠΈΠ±ΠΎΡΠΎΠ² (ΠΏΠ»Π°Π½ΡΠ΅ΡΡ, Π½ΠΎΡΡΠ±ΡΠΊΠΈ, ΡΠ΅Π»Π΅ΡΠΎΠ½Ρ ΠΈ Π΄Ρ.) ΠΈ ΠΏΡΠΈ ΡΠΎΠ·Π΄Π°Π½ΠΈΠΈ ΠΎΠ±ΡΠ΅ΠΊΡΠΎΠ² Π΄ΠΈΠ·Π°ΠΉΠ½Π° ΠΈΠ· Π°Π»ΡΠΌΠΈΠ½ΠΈΡ ΠΈ Π΅Π³ΠΎ ΡΠΏΠ»Π°Π²ΠΎΠ²
Effect of electrolyte composition on porous anodic aluminium oxide formation
The effect of composite anodizing electrolyte with reduced content of organic acids on the formation rate, structure and properties of aluminium oxide film was studied. It is established that for the production of electronic devices structural parts of improved insulation properties it is preferable to use the solutions where less active citric acid predominates. It has been shown that kinetic retardation of specified anodic process of aluminium oxidation increases the density of barrier oxide while preserving the rate of main porous Al[2]O[3] layer growth