SiC Ceramic

ʻO Silicon carbide kahi ʻano carbide synthetic me ka mole SiC.Ke hoʻoulu ʻia, hana maʻamau ka silica a me ke kalapona i nā wela kiʻekiʻe ma luna o 2000°C.Silicon carbide he theoretical density o 3.18g/cm3, he Mohs paakiki e hahai daimana, a me ka microhardness o 3300kg/mm3 ma waena o 9.2 a me 9.8.Ma muli o kona paʻakikī kiʻekiʻe a me ke kūpaʻa kiʻekiʻe, loaʻa iā ia nā hiʻohiʻona o ke kūpaʻa wela kiʻekiʻe a hoʻohana ʻia no nā ʻano ʻāpana like ʻole o ka ʻaʻahu, corrosion-resistant a me ka wela wela.He ʻano hou o ka ʻenehana seramika ʻaʻahu.

1、 Waiwai kemika.

(1) Ke kū'ē o ka oxidation: Ke hoʻomehanaʻia ka mea silicon carbide i ka 1300 ° C i ka lewa, hoʻomaka ka papa pale silicon dioxide e hanaʻia ma luna o kaʻili o kona aniani carbide silicon.Me ka mānoanoa o ka papa pale, ke hoʻomau nei ka carbide silicon kūloko i ka oxidize, i loaʻa i ka silicon carbide ke kūpaʻa oxidation maikaʻi.Ke piʻi ka mahana ma mua o 1900K (1627 ° C), hoʻomaka ka pōʻino o ke kiʻi pale silicon dioxide, a hoʻonui ʻia ka oxidation o ka silicon carbide, no laila ʻo 1900K ka mahana hana o ka silicon carbide i loko o kahi ea oxidizing.

(2) Acid a alkali resistance: ma muli o ke kuleana o ke kiʻiʻoniʻoni pale silicon dioxide, loaʻa i ka silicon carbide nā waiwai i ka hana o ke kiʻi pale silicon dioxide.

2、Ka waiwai kino a me ka mechanical.

(1) Density: ʻO ka nui o ka nui o nā kristal carbide silicon kahi kokoke loa, i manaʻo ʻia he 3.20g / mm3, a ʻo ka nui o ka hoʻopili kūlohelohe o ka silicon carbide abrasives ma waena o 1.2-1.6g / mm3, e pili ana i ka nui o ka nui. ka hoʻohui ʻana i ka nui ʻāpana a me ke ʻano o ka nui o nā ʻāpana.

(2) Paʻakikī: ʻO ka paʻakikī Mohs o ka silicon carbide he 9.2, ka micro-density o Wessler he 3000-3300kg / mm2, ʻo ka paʻakikī o Knopp he 2670-2815kg / mm, ʻoi aku ka kiʻekiʻe o ka abrasive ma mua o corundum, kokoke i ke daimana, cubic boron nitride a me ka boron carbide.

(3) Ka hoʻoili wela: ʻO nā huahana silicon carbide he kiʻekiʻe ka wela wela, ka liʻiliʻi o ka hoʻonui ʻana i ka wela, ke kūpaʻa haʻalulu kiʻekiʻe, a he mau mea refractory kiʻekiʻe.

3、 Nā waiwai uila.