Stoichiometric tetragonal Bal-xSrxTiO3 (x = 0.23) nanopowders were prepared by stearic acid gel(SAG) method using barium stearate, strontium stearate, tetrabutyl titanate as Ba, Sr, Ti sourcesand stearic acid as complexing reagent. Thermal analysis including differential thermogravimetric(DTG) and TG, Fourier transform infrared spectrometry (FTIR), X-ray diffraction (XRD) andtransmission electr...

This research has investigated the structural changes and pozzolanic activity produced in acid activated smectite clay. The activation treatment used HCl at different concentrations, using times a range of temperatures. X-ray diffraction, Fourier transform infrared spectroscopy scanning electron microscopy coupled with energy dispersive were to determine dissolution mechanism characterise clay ...

First heterometal-organic single source precursors for NaYF(4) nanomaterials as a host matrix for up-conversion emission are reported. These novel heterobimetallic derivatives NaY(TFA)(4)(diglyme) (1), [Na(triglyme)(2)][Y(2)(TFA)(7)(THF)(2)] (2) and Na(2)Y(TFA)(5)(tetraglyme) (3) (TFA = trifluoroacetate), which were fully characterized by elemental analysis, FT-IR and (1)H NMR spectroscopy, TG-...

Abstract As a commonly used Chinese herbal medicine in clinic, LongGu is often as powder, which difficult to identify manually. In this study, unsupervised learning method was model and LongGu, calcining counterfeits by infrared spectroscopy. After preprocessing the original data, current principal component analysis method, reduce data dimension, then KMeans algorithm realize classification id...

The synthesis of nanoparticulate α-Al 2 O 3 at 600 • C using a sucrose-based polymer dispersion technique was reported recently by Das et al. [1]. This is of interest, as γ-Al 2 O 3 is frequently an unwanted intermediate phase in the conversion of nanoparticulate amorphous alu-mina into nanoparticulate α-Al 2 O 3. γ-Al 2 O 3 has a relatively disordered structure, but usually requires temperatur...

Nanocrystalline complex oxides have been synthesized by combination of sol–gel auto combustion and ultrasonic irradiation techniques using copper nitrate, zinc nitrate as metallic nitrates and glycine, urea and thiourea as fuels. Sol-gel combustion (combination of the chemical sol–gel process and the combustion process) as a proper synthesized technique is used to synthesize ZnO/CuO nanocomposi...

Fluorspar is considered a critical raw material for the European Union, due to its industrial uses and lack of sufficient extraction in countries. It source hydrofluoric acid manufacture, this latter chemical being employed, among other uses, pickling stainless steels. From activity, sludge generated need used water treatment. In article, we report full characterization residue, obtained an pla...