Fused Silica Excellent thermal and Chemical Properties as Crucible Material

Electro-quartz
Fuskar quartz
Fused silica dunƙule

Takaitaccen Bayani

Fused Silica an yi shi ne daga silica mai tsafta, ta amfani da fasahar fusion na musamman don tabbatar da inganci mafi girma. Silica ɗinmu Fused ya wuce 99% amorphous kuma yana da ƙarancin ƙarancin haɓakar haɓakar zafi da babban juriya ga girgiza zafi. Fused Silica ba shi da ƙarfi, yana da kyakkyawan kwanciyar hankali na sinadarai, kuma yana da ƙarancin ƙarancin wutar lantarki.

TUNTUBE YANZU

Aikace-aikace

Fused Silica shine ingantaccen kayan da aka yi amfani da shi a cikin simintin saka hannun jari, refractories, foundries, tukwane na fasaha, da sauran aikace-aikacen da ke buƙatar daidaito, samfur mai tsabta tare da ƙarancin haɓakar zafi.

Haɗin Sinadari	Darasi na Farko	Na al'ada	Darasi na Biyu	Na al'ada
SiO2	99.9% min	99.92	99.8% min	99.84
Fe2O3	50ppm max	19	80ppm max	50
Farashin 2O3	100ppm max	90	150ppm max	120
K2O	30ppm max	23	30ppm max	25

Tsarin Samar da Hali

Fused ma'adini yana da kyau kwarai thermal da sinadarai Properties a matsayin crucible abu don guda crystal girma daga narkewa, da kuma high tsarki da kuma low cost sa shi musamman m ga ci gaban high-tsarki lu'ulu'u.Amma, a cikin ci gaban wasu nau'in lu'ulu'u, a Layer na pyrolytic carbon shafi ake bukata tsakanin narkewa da ma'adini crucible.

Mabuɗin Abubuwan Silica Fused

Fused silica yana da abubuwa masu ban mamaki da yawa duka game da injina, thermal, sunadarai da kaddarorin gani:
• Yana da wuya kuma mai ƙarfi, kuma ba shi da wahala sosai don na'ura da goge baki. (Mutum kuma yana iya amfani da micromachining laser.)
• Babban zafin canjin gilashin yana sa ya fi wahala narkewa fiye da sauran tabarau na gani, amma kuma yana nuna cewa yanayin zafi mai girma yana yiwuwa. Koyaya, fused silica na iya nuna ɓarna (cristalization na gida a cikin nau'in cristobalite) sama da 1100 ° C, musamman a ƙarƙashin tasirin wasu ƙazantattun abubuwa, kuma wannan zai lalata abubuwan gani.
• Ƙimar haɓakar haɓakar thermal yana da ƙananan ƙananan - game da 0.5 · 10-6 K-1. Wannan ya ninka sau da yawa ƙasa fiye da na tabarau na yau da kullun. Ko da mafi ƙarancin haɓakar thermal a kusa da 10-8 K-1 yana yiwuwa tare da gyare-gyaren nau'in silica da aka haɗa tare da wasu titanium dioxide, wanda Corning [4] ya gabatar kuma ana kiransa gilashin faɗaɗa ƙananan ƙananan.
• Babban ƙarfin juriya na thermal shine sakamakon raunin haɓakar thermal mai rauni; akwai matsakaicin matsananciyar damuwa na inji ko da lokacin da babban zafin jiki gradients ya faru saboda saurin sanyaya.
• Silica na iya zama tsaftar sinadarai, ya danganta da hanyar ƙirƙira (duba ƙasa).
• Silica ba ta da ƙarfi sosai, ban da hydrofluoric acid da maganin alkaline mai ƙarfi. A yanayin zafi mai tsayi, yana da ɗan narkewa a cikin ruwa (mafi yawa fiye da ma'adini na crystalline).
• Yankin nuna gaskiya yana da faɗi sosai (kimanin 0.18 μm zuwa 3 μm), yana ba da damar yin amfani da silica da aka haɗa ba kawai a cikin cikakken yanayin yanayin da ake iya gani ba, har ma a cikin ultraviolet da infrared. Koyaya, iyakokin sun dogara sosai akan ingancin kayan. Misali, makada mai ƙarfi na infrared na iya haifar da abun ciki na OH, da kuma ɗaukar UV daga ƙazantattun ƙarfe (duba ƙasa).
• A matsayin kayan amorphous, fused silica is optically isotropic - sabanin ma'adini crystalline. Wannan yana nuna cewa ba shi da birefringance, kuma fihirisa mai jujjuyawa (duba Hoto 1) ana iya siffanta shi da tsarin Sellmeier guda ɗaya.