SYNTHESIS OF Ba0.5Sr0.5Co0.8Fe0.2O3 δ FROM DIFFERENT PRECURSOR MATERIALS EMPLOYING MICROWAVE HEATING

Ba0.5Sr0.5Co0.8Fe0.2O3-δ pow-ders with pe-rov-ski-te struc-tu-re ha-ve been synthesized from dif-fe-rent mix-tu-res of ni-tra-te, oxi-de and car-bo-na-te pre-cur-sors, ir-ra-di-a-ted in a mic-ro-wa-ve oven with 2.45 GHz and va-ri-o-us po-wer out-puts. The mic-ro-wa-ve synthe-sis was car-ried out in oxygen at-mosp-he-re. The ef-fects of ra-pid mic-ro-wa-ve he-a-ting we-re evalu-a-ted ma-inly by com-pa-ring the sta-te of materials be-fo-re and af-ter mic-ro-wa-ve exposure. Different pre-cur-sors we-re eva-lu-a-ted ac-cor-ding to the-ir sen-si-ti-vity to mic-ro-wa-ve fi-eld and to-xi-city of bypro-ducts. The lo-wer tem-pe-ra-tu-re and shor-ter ti-me for Ba0.5Sr0.5Co0.8Fe0.2O3-δ synthe-sis with mic-ro-wa-ve ir-ra-di-a-tion might be ascri-bed to the activa-ting and fa-ci-li-ta-ting ef-fect of mic-ro-wa-ve on so-lid pha-se dif-fu-sion. Mic-ro-wa-ve irradi-a-tion is pro-ved to be a no-vel, ti-me-sa-ving and energy-ef-fi-ci-ent ro-u-te to the synthe-sis of Ba0.5Sr0.5Co0.8Fe0.2O3-δ pow-der.