ʻO kekahi, ʻo ke ʻano hana -ʻano kinoea, ʻano hoʻoheheʻe kemika (CAV), ʻike ʻia ʻo ke ʻano pyrolysis, ke ʻano maloʻo a i ʻole ke ʻano puhi ahi. ʻO kāna mau mea maka, ʻo ia ka silicon tetrachloride, oxygen (a i ʻole ea) a me ka hydrogen, e hana ana i nā wela kiʻekiʻe.
The reaction equation is: SiCl4+2H2+O2 - >SiO 2+4HCl. Hoʻopili ʻia ka ea a me ka hydrogen i ka pressurization, kaʻawale, ka hoʻoluʻu a me ka dehydration, ka silica gel maloʻo, ka lepo a me ka kānana ma mua o ka hoʻouna ʻia ʻana i loko o ka umu hydrolysis synthetic. Ma hope o ka hoʻouna ʻia ʻana o ka mea maka o ka silicon tetrachloride i ke kolamu distillation no ka distillation, ua wela a evaporated i ka evaporator, a laila hoʻouna ʻia i ka umu hydrolysis synthetic me ka ea maloʻo a kānana e like me ka mea lawe. Hoʻomohu ʻia ʻo Silicon tetrachloride i nā wela kiʻekiʻe (ʻo ka wela wela 1000-1800 degere) a laila hoʻoheheʻe ʻia ke kinoea -phase hydrolysis me ka nui o ka hydrogen a me ka oxygen (a i ʻole ea) ma kahi o 1800 degere. I kēia manawa, maikaʻi loa nā ʻāpana kinoea silica i hana ʻia a hana ʻia nā aerosol me nā kinoea, paʻakikī ke hopu.
No laila, hoʻohui mua ʻia lākou i mau ʻāpana nui i loko o kahi aggregator, a laila hōʻiliʻili ʻia e kahi mea hoʻokaʻawale ʻino, a hoʻouna ʻia i kahi umu deacidification. Holoi ʻia ke kinoea-phase silica me ka nitrogen-ea a hiki i ka helu PH he 4 a 6, ʻo ia ka huahana i pau.