Glycine–nitrate synthesis of Sr doped La₂Zr₂O₇pyrochlore powder

Abstract

Materials with A 2 B 2 O 7 (pyrochlore) structure have received significant attention for their applications as new protonic conductors and materials used in electronic devices. One of the unique synthesis routes for La 2 Zr 2 O 7 (pyrochlore) powders is the glycine-nitrate combustion method, which shows superior properties of the synthesised powder using glycine as a complexing agent. The Sr doped La 2 Zr 2 O 7 powders in pure pyrochlore structure were produced using this approach. Selected characteristics of the synthesised powders, such as crystal structure, lattice parameters, crystallite size, the vibrational properties, the morphology of the particles, along with the specific surface area and particle size, have been investigated. The dependence of some properties on annealing temperatures of the powders has been studied.

An electron spin resonance and photoluminescence investigation of the effect of annealing temperature on Gd-doped La2Zr2O7 nano-ceramics

“…The most common being the solid-state reaction route method of mixing the respective metal oxides [18]. In addition wet chemical methods like sol-gel [19], co-precipation [20], hydrothermal [21], solvothermal [22], combustion synthesis [23] and Pechini method [24] have been used to prepare this particular compound. In case of the samples prepared through solid state reaction route suffer from non-homogeneity, abnormal grain growth, and poor sintering behavior due to the sub-micrometer size of the final product.…”

A study of suppressed formation of low-conductivity phases in doped Li7La3Zr2O12 garnets by in situ neutron diffraction

“…33 2) and ( 5)), and this helps to reduce the chance of Li 2 CO 3 evaporation at the following high-temperature stage. This low-temperature dwell shall not coarsen the formed La 2 Zr 2 O 7 grains 48,49 to retard the formation of garnets. For the formation of garnets (reaction (4) and ( 6)), the particular temperature with the highest producing rate is indicated in Fig.…”

Recent development of A2B2O7 system transparent ceramics

“…The major advantages of the combustion process are: improvement in processing time, energy saving, and the high sintering activity of the combustion products. In this method, nitrate is the common raw material, and carbohydrazide [79], urea [79][80][81], glycine [41,80,82,83], and ethylene diamine tetraacetic acid (EDTA) [41] or two of them are used as fuels. [44] powders were synthesized by combustion method.…”