Polycrystalline faibha yakawanda ine yakaderera density, yakaderera thermal conductivity, yakanaka yekushisa kuvhunduka kuramba, yakakwirira kushanda temp, yakanaka makemikari kugadzikana, yakanaka anti-corrosion nezvimwe zvinhu, inoshandiswa zvakanyanya musimbi, kuvaka, ceramics, aerospace, mauto nezvimwe maindasitiri.