Nadiifinta sareeysa ee alumina ceramic Block waa shay tayo sare leh oo si gaar ah loogu talagalay codsiyada warshadaha iyo tignoolajiyada horumarsan. Alaabtan waxaa sidoo kale loo yaqaanaa alumina dhoobada dhoobada, ulo dhoobada nadiifka ah oo sarreeya, ama ulaha dhoobada alumina saafiga ah. Waxay si gaar ah u qabataa jawiga leh shuruudaha adag ee adkeysiga, xasiloonida kulaylka, iyo caabbinta kiimikada. Ulaha dhoobada ah waxaa lagu soo saaraa iyada oo la adeegsanayo hababka wax soo saarka saxda ah waxayna maraan xakamaynta tayada adag, waxayna ku habboon yihiin hababka heerkulka sare, korantada korantada, iyo qaybaha farsamada ee u baahan xoog sare iyo xirashada caabbinta.
Dulmarka ulaha dhoobada alumina ee nadiifka sare ah ayaa muujinaya sifooyinka ay ka kooban yihiin, kuwaas oo inta badan ka kooban alumina (Al₂O₃) oo leh waxyaabo wasakh ah oo aad u hooseeya. Tani waxay hubisaa in ay si fiican u muuqaal iyo kiimikaad guryaha, samaynta iyaga ku haboon codsiyada sare ee warshadaha kala duwan. Nadiifinta sareeysa ee alaabtani waxay hubisaa awoodda dielectric-ka ee aad u fiican, kulaylka kulaylka, iyo iska caabinta daxalka iyo xirashada. Tilmaamahani waxay ka dhigayaan doorashada la doorbido ee soo saarayaasha raadinaya alaab la isku halleyn karo oo waara oo loogu talagalay alaabadooda.
Astaamaha ugu muhiimsan ee ulaha dhoobada alumina ee nadiifka ah waxaa ka mid ah qallafsanaan aad u sarreeya, porosity aadka u hooseeya, iyo xasilooni cabbir heersare ah. Qalabkan waxaa lagu heli karaa cabbirro iyo qaabab kala duwan waxaana lagu beddeli karaa shuruudo gaar ah. Waxay ilaalin kartaa sharafta qaab dhismeedka heerkul sare, taas oo ka dhigaysa qayb ku habboon qaybaha foornada, nozzles, iyo codsiyada kale ee kuleylka u adkaysta. Intaa waxaa dheer, hantideeda aan shaqaynayn ayaa ka dhigaysa mid ku habboon nidaamyada korantada iyo elektiroonigga ah.
Marka la eego sharraxaadaha gaarka ah, ulaha dhoobada alumina-nadiifinta sare leh waxaa lagu soo saaraa tignoolajiyada horumarsan ee sintering, kaas oo hubinaya qaab-dhismeed yar oo isku mid ah iyo sifooyinka farsamada ugu fiican. Habka wax-soo-saarka wuxuu u baahan yahay xakamaynta saxda ah ee cabbirka walxaha, cufnaanta, iyo xaaladaha toogashada si loo gaaro sifooyinka waxqabad ee la doonayo. Tani waxay keenaysaa yaraanta ugu yar inta lagu jiro farsamaynta iyo awoodda lagu ilaalinayo qaabkeeda iyo cabbirkeeda xaaladaha daran. Isku halaynta iyo joogtaynteeda awgeed, alaabtan waxaa caadi ahaan loo adeegsadaa wax soo saarka semiconductor, injineernimada saxda ah, iyo mashiinada waxqabadka sare leh.
Markaad tixgeliso xaaladaha codsiga ee ulaha dhoobada alumina ee nadiifka ah, waxaa badanaa la ogaadaa in si weyn loogu isticmaalo hawada, baabuurta, elektiroonigga, iyo warshadaha qalabka caafimaadka. Goobta hawada sare, waxaa loo isticmaalaa qaybaha u baahan caabbinta kulaylka sare iyo xoogga farsamada; warshadaha baabuurta, waxay u adeegaan sidii qaybo waara oo ku jira nidaamyada matoorada iyo qaybaha qiiqa; goobta elektiroonigga ah, waxay u dhaqmaan sida walxaha dahaarka ee looxyada wareegga iyo xirayaasha; qalabka caafimaadka, sababtoo ah isqabqabsigooda bayoloji iyo iska caabbinta jeermiska, waxaa loo adeegsadaa qalabaynta iyo qalabka qalliinka.
ALUMINA TECH DATA
|
ITEM
|
UNIT
|
99.9 ALUMINA
|
|
Density
|
G/cm3
|
3.94
|
|
Bending Resistance
|
Mpa
|
500
|
|
Compressive Strength
|
Mpa
|
3300
|
|
Elasticity Modulus
|
Gpa
|
400
|
|
Shock Strength
|
Mpam/2
|
5.2
|
|
Vaporization Coefficient
|
M
|
12
|
|
Vickers Hardness
|
HV0.5
|
2000
|
|
Thermal Expansivity
|
10-6K-1
|
8.0
|
|
Conductivity
|
W/MK
|
28
|
|
Thermal Shock Resistance
|
AT℃
|
280
|
|
Maximum Service Temperature
|
℃
|
1750
|
|
20℃ Volume Resistance
|
Ω
|
≥1015
|
|
Dielectric Strength
|
KV/mm
|
30
|
|
Apparent Porosity
|
%
|
0
|
|
Permittivity
|
Er
|
10
|
|
Dielectric Loss Angle
|
tanδ
|
0.001
|