Hoʻohui ʻia ʻo Silica maikaʻi loa me nā waiwai wela a me nā waiwai e like me nā mea Crucible
- Electro-quartz
- ʻO ka quartz i hui ʻia
- Puʻupuʻu silica fused
Wehewehe pōkole
Nā noi
ʻO Fused Silica kahi mea waiwai maikaʻi loa no ka hoʻohana ʻana i ka hoʻolei kālā, refractory, foundries, ceramics technical, a me nā noi ʻē aʻe e koi ana i kahi huahana maʻemaʻe kiʻekiʻe me ka hoʻonui haʻahaʻa haʻahaʻa.
| Hoʻohui Kimia | Papa Ekahi | Maʻamau | Papa Elua | Maʻamau |
| SiO2 | 99.9% min | 99.92 | 99.8% min | 99.84 |
| Fe2O3 | 50ppm max | 19 | 80ppm max | 50 |
| Al2O3 | 100ppm max | 90 | 150ppm max | 120 |
| K2O | 30ppm max | 23 | 30ppm max | 25 |
Kaʻina hana o ka hana a me ke ano
Hana ʻia ʻo Fused Silica mai ka silica maʻemaʻe kiʻekiʻe, me ka hoʻohana ʻana i ka ʻenehana fusion kūikawā e hōʻoia i ka maikaʻi kiʻekiʻe.ʻO kā mākou Fused Silica ma luna o 99% amorphous a he haʻahaʻa haʻahaʻa haʻahaʻa o ka hoʻonui ʻana i ka wela a me ke kūpaʻa kiʻekiʻe i ka haʻalulu wela.ʻAʻole inert ka Fused Silica, maikaʻi ke kūpaʻa kemika, a haʻahaʻa loa ka conductivity uila.
ʻO ka quartz fused maikaʻi loa ka wela a me nā waiwai kemika ma ke ʻano he crucible mea no ka ulu aniani hoʻokahi mai ka hoʻoheheʻe ʻana, a ʻo kona maʻemaʻe kiʻekiʻe a me ke kumu kūʻai haʻahaʻa he mea hoihoi loa ia no ka ulu ʻana o nā kristal maʻemaʻe kiʻekiʻe. ka papa o ka pyrolytic carbon coating pono ma waena o ka hehee a me ka quartz crucible.
ʻO nā mea nui o ka Silica Fused
He mau hiʻohiʻona kupaianaha ka Fused silica e pili ana i kona mechanical, thermal, chemical and optical properties:
• He paʻakikī a paʻakikī, ʻaʻole paʻakikī loa i ka mīkini a poni.(E hoʻohana paha kekahi i ka micromachining laser.)
• 'O ke aniani ki'eki'e ka ho'ololi 'ana i ka wela e 'oi aku ka pa'akikī o ka ho'ohehe'e 'ana ma mua o nā makaaniani optical 'ē a'e, akā, 'o ia ho'i ka mea e hiki ai ke ki'eki'e.Eia naʻe, hiki i ka silica fused ke hōʻike i ka devitrification (ka crystallization kūloko ma ke ʻano o ka cristobalite) ma luna o 1100 °C, ma lalo o ka mana o kekahi mau mea haumia, a e hoʻopau kēia i nā waiwai optical.
• He haʻahaʻa loa ka helu hoʻonui wela - ma kahi o 0.5 · 10−6 K−1.He mau manawa haʻahaʻa kēia ma mua o nā aniani maʻamau.Hiki ke hoʻonui ʻia ka wela ma kahi o 10−8 K−1 me ke ʻano hoʻololi o ka silica fused me kekahi titanium dioxide, i hoʻolauna ʻia e Corning [4] a kapa ʻia ke aniani hoʻonui haʻahaʻa haʻahaʻa.
• ʻO ke kūpaʻa haʻalulu wela kiʻekiʻe ka hopena o ka hoʻonui ʻana i ka wela;aia wale nō ke koʻikoʻi mechanical ma muli o ka hoʻoluʻu wikiwiki ʻana.
• Hiki i ka silica ke ma'ema'e loa, ma muli o ke ka'ina hana (e 'ike ma lalo).
• He mea kemika loa ka silica, koe nae ka waika hydrofluoric a me ka wai alkaline ikaika.Ma nā mahana kiʻekiʻe, hiki ke hoʻoheheʻe ʻia i ka wai (ʻoi aku ka nui ma mua o ka quartz crystalline).
• He ākea loa ka ʻāpana ʻike (e pili ana i 0.18 μm a 3 μm), e ʻae ana i ka hoʻohana ʻana i ka silica fused ʻaʻole wale ma loko o ka ʻāpana spectral ʻike ʻia, akā i ka ultraviolet a me ka infrared.Eia naʻe, pili nui nā palena i ka maikaʻi o nā mea.No ka laʻana, hiki ke hoʻokumu ʻia nā pūnae hoʻoheheʻe infrared ikaika e ka maʻiʻo OH, a me ka absorption o UV mai nā haumia metala (e ʻike i lalo).
• Ma ke ʻano he mea amorphous, ʻo ka silica fused he optically isotropic - he ʻokoʻa me ka quartz crystalline.Hōʻike kēia ʻaʻole ia he birefringence, a hiki ke ʻike ʻia kona helu hoʻohālikelike (e nānā i ke Kiʻi 1) me kahi ʻano Sellmeier hoʻokahi.
