𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Improved Mechanical Properties in Nb2O5/V2O5 Doped Spinel Ferrites

✍ Scribed by D. Arcos; M. Vallet-Regı́

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
269 KB
Volume
148
Category
Article
ISSN
0022-4596

No coin nor oath required. For personal study only.

✦ Synopsis

Ceramic Zn ferrites have been obtained from powder synthesized by solidi5cation of a liquid solution technique. Typical dopants used by the ceramic ferrites industry, such as SiO 2 , CaO, V 2 O 5 , and Nb 2 O 5 , have been added. From porosity, fractographic, and indentation studies, di4erences in mechanical properties have been observed. Vickers hardness and fracture toughness improve with the addition of V 2 O 5 and Nb 2 O 5 when compared with undoped and with SiO 2 +CaO ferrites. In order to explain the behavior of our ferrites, two di4erent mechanisms on a grain boundary are proposed.

📜 SIMILAR VOLUMES

Solid state NMR characterization of indi
Solid state NMR characterization of individual compounds and solid solutions formed in Sc2O3V2O5Nb2O5Ta2O5 system
✍ Dzhalil Khabibulin; Konstantin Romanenko; Mikhail Zuev; Olga Lapina 📂 Article 📅 2007 🏛 John Wiley and Sons 🌐 English ⚖ 428 KB

In this study, 51 V, 45 Sc and 93 Nb MAS NMR combined with satellite transition spectroscopy analysis were used to characterize the complex solid mixtures: VNb 9.1-x/ Ta 9x O 25 , ScNb .1-x/ Ta x O 4 and ScNb 2.1-x/ Ta 2x VO 9 (x = 0, 0.3, 0.5, 0.7, 1.0). This led us to describe the structures of Sc

Sol-Gel-Derived Sb-Doped SnO2 Nanopartic
Sol-Gel-Derived Sb-Doped SnO2 Nanoparticles Controlled in Size by Nb2O5
✍ X. Zhu; J. Geis-Gerstorfer 📂 Article 📅 2003 🏛 John Wiley and Sons 🌐 English ⚖ 131 KB

Nanocrystalline Sb-doped SnO 2 particles were prepared by sol-gel and their particle growth was controlled by niobium oxide. In the present synthesis, SnCl 4 and SbCl 3 , as precursors, were dissolved and hydrolyzed in ethylene glycol at 80±120 C, and further 0.1 mol.-% Nb 2 O 5 through its precurso