Yttrium oxide crystallized in cubic system and characterized by high thermoconductivity and transparence in the IR-range. Y₂O₃ nanoparticles are precursors for laser ceramic fabrication.

Nanoparticles of yttrium oxide formation were investigated using soft chemistry methods, i.e. yttrium oxide dissolution in acids (nitric, hydrochloric) followed by pH-regulation by the ammonium solution titration or by the urea hydrolysis under heating. The obtained gel-like precipitations of the precursors lost their volatile components during drying and heating. The follows chemical reactions took place in the nitrate processes:

Y₂OH)₅NO₃×nH₂O --- Y₂(OH)₅NO₃ + nH₂O (n=2-3),

Y₂(OH)₅NO₃ --- Y₄O₅(NO₃)₂ +5H₂O,

Y₄O₅(NO₃)₂ --- 2Y₂O₃ + 2NO+1.5O₂,

at the first step finished at 150 ^oC, the second – at 340 ^oC and the third – at 500-550 ^oC.

The coherent dispersion scattering regions sizes of Y₂O₃ particles are 30-40, 56-72 and 90-130 nm after thermal treatment at 500, 750, 900 ^oC respectively and are the function of first deposition conditions (composition and solutions electronic microscopy data provides the strong multilevel agglomeration particles formation. Y₂O₃ particles form follows the precursors particles form. The addition of the surface active compounds to the initial solution allows changing the deposited particles form.

The ultra-sonic effect (frequency 22 kHz, power 100 W) during precursor precipitation in the cavitations zone leads to plates formation (size 1×1 μm and thickness approximately 20 nm). Without surface active compounds the plates grow into the agglomerates with the linear size approximately 1 μm. Thermal treatment of precursors allows fabrication quasi 2D particles of cubic yttrium oxide.

The conditions of globular 13-130 nm Y₂O₃ nanoparticles fabrication were determinated.

• Legal notice:
  

  Copyright (c) Pielaszek Research, all rights reserved.
  The above materials, including auxiliary resources, are subject to Publisher's copyright and the Author(s) intellectual rights. Without limiting Author(s) rights under respective Copyright Transfer Agreement, no part of the above documents may be reproduced without the express written permission of Pielaszek Research, the Publisher. Express permission from the Author(s) is required to use the above materials for academic purposes, such as lectures or scientific presentations.
  In every case, proper references including Author(s) name(s) and URL of this webpage: https://science24.com/paper/4050 must be provided.

1. Nucleation and growth of fluoride crystals by agglomeration of the nanoparticles
2. Partially stabilized zirconia (PSZ): crystal growth and structure
3. Investigation on the Li, Ba // BO₂, F ternary reciprocal system and growth of bulk β–BaB₂O₄ crystals
4. Synthesis of the promising laser material Cr⁴⁺ doped LiGaSiO₄ nano-glass-ceramics
5. Complex anionic isomorphism in new non-centrosymmetric  fluoride borates
6. Preparation of fluoride laser ceramics
7. Forming of metal structures in dielectric CaF₂ crystals
8. Synthesis and luminescent characteristics of NaYF₄:Yb:Er powders for photodynamic cancer therapy
9. Optical images of real structure for oxide crystals grown from the melt
10. Observation of induced birefringence in crystals with scheelite structure