INFLUENCE OF SYNTHESIS PARAMETERS ON ELECTRICAL PROPERTIES OF SISTEMS MgO-TiO2

In this pa-per mag-ne-si-um car-bo-na-te (MgCO3) and ti-ta-ni-um-di-o-xi-de (TiO2), crystal-li-ne mo-di-fi-ca-tion ru-ti-le we-re used as star-ting pow-ders.. Pro-cess of sin-te-ring can be en-han-ced if mec-ha-ni-cal ac-ti-va-tion pre-ce-des. Mec-ha-ni-cal ac-ti-va-tion of the star-ting mix-tu-re was per-for-med by high energy ball mil-ling using ZrO balls and ves-sels with ball to pow-der mass ra-tio 40:1. The ob-ser-ved grin-ding ti-mes we-re 15, 30, 60 and 120 mi-nu-tes. The isot-her-mal sin-te-ring of com-pac-ted pow-ders was con-duc-ted at 1100oC du-ring 30, 60 and 180 mi-nu-tes. For spe-ci-mens synthe-si-zed in such a man-ner, mic-ro-wa-ve di-e-lec-tric pro-per-ti-es we-re me-a-su-red, qu-a-lity fac-tor Q, spe-ci-fic elec-tri-cal re-si-sti-vity (ρ) and the di-e-lec-tric con-stant (εr).