The precursor of nanocrystalline BiFeO3 was obtained by solid-state reaction at low heat using Bi(NO3)3·5H2O, FeSO4·7H2O, and Na2CO3·10H2O as raw materials. The nanocrystalline BiFeO3 was obtained by calcining the precursor. The precursor and its calcined products were characterized by differential scanning calorimetry (DSC), Fourier transform-infr...
Thermal stability of (Ce0.72Cu0.28)90-xAl10Fex (x= 0, 5 or 10) bulk metallic glasses (BMGs) was analyzed by differential scanning calorimetry (DSC) and X-ray diffraction (XRD). Temperatures corresponding to glass transition (Tg), onset of crystallization (Tx) and crystallization peak (Tp) shift to higher temperature by increasing the Fe content. Ki...
Structural relaxation process in Cu46Zr45Al 7Y2 and Zr55Cu30Ni 5Al10 bulk metallic glasses during annealing below the glass transition temperature Tg was investigated by differential scanning calorimetry (DSC). The features of enthalpy relaxation are sensitive to both annealing temperature and annealing time. For a given annealing time ta, the resu...
We present a facile sol–gel route to synthesize lanthanum-substituted bismuth titanate (BLT). The chemical reactions and crystallization process of this method using the initial materials of bismuth subnitrate [4BiNO3(OH)2·BiO(OH)], lanthanum nitrate [La(NO3)3·6H2O] and tetrabutyl titanate [Ti(C4H9O)4] were investigated by thermogravimetric and dif...
Samples of TiO2 doped with 2 and 5 mol% of Cu2+ were prepared by the sol-gel process. Titanium(IV) isopropoxide and copper(II) nitrate were used as precursors. The samples were prepared as monolithic shapes, dried at 80°C for 72 h and heat treated at various temperatures in the range 200–900°C for 2 h. The structural transformation and texture of t...
Dacitic magma, a mixture of high-temperature (T) aphyric magma and low-T crystal-rich magma, was erupted during the 1991–1995 Mount Unzen eruptive cycle. Here, the crystallization processes of the low-T magma were examined on the basis of melt inclusion analysis and phase relationships. Variation in water content of the melt inclusions (5.1–7.2 wt%...
