Zinc Oxide for Ceramic Semiconductor
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Zinc Oxide for Ceramic Semiconductor

Úsáidtear ocsaíd since mar ábhar leathsheoltóra ceirmeach sa tionscal leictreach Is ábhar tábhachtach leathsheoltóra ceirmeach é ocsaíd since le comhéifeacht neamhlíneach den scoth, raon leathan voltais varistor (cúpla deichiú volta go dtí na mílte cileavolta), comhéifeacht teocht voltais bheag, freagairt thapa. , agus sruth sceite beag. Dothuaslagtha in uisce, intuaslagtha in aigéad agus alcaile, is ocsaíd amfaitéiteach é ocsaíd since le haghaidh leathsheoltóra ceirmeach.

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Zinc Oxide for Ceramic Semiconductor

Úsáidtear ocsaíd since mar ábhar leathsheoltóra ceirmeach sa tionscal leictreach

Zinc oxide is an important ceramic semiconductor material with excellent nonlinear coefficient, wide range of varistor voltage (a few tenths of volts to tens of kilovolts), small voltage temperature coefficient, fast time response, and small leakage current. Insoluble in water, soluble in acid and alkali, it is an amphoteric oxide.

 

 

Ainm Táirge

Ocsaíd since

Molecular formula

ZnO

CAS NO

1314-13-2

EINECS UIMH

215-222-5

Dlús

5.606g / cm3

Meáchan móilíneach

81.38

Melting point

1975â „ƒ

Pointe Fiuchta:

2360ºC

Íonachta

0.99

Active substance content

0.997

CÓD H.S.

2817001000

Dealramh

White powder or crystal 

 

 

 

Is criostail heicseagánach iad na criostail ocsaíd since do leathsheoltóirí ceirmeacha, agus is beag iompróirí seoltaí atá ag criostail ocsaíd since nó polycrystals a chomhlíonann an caidreamh stoichiometric ag teocht an tseomra agus a bhfuil feidhmíocht inslitheoir acu. Déileáiltear le ocsaíd since le haghaidh leathsheoltóirí ceirmeacha ag teocht ard san aer agus tiocfaidh siad chun bheith ina gcriostal neamhiomlán a chlaonann ón gcaidreamh stoichiometric mar gheall ar bhreis nó easnamh ocsaigine, is é sin, criostail neamh-stoichiometric ina bhfuil easnaimh ocsaigine nó sinc interstitial ocsaigine. Méadaítear na leictreoin nó na poill saor in aisce go mór, agus athraíonn an ocsaíd since le haghaidh leathsheoltóra ceirmeach ó inslitheoir bán go leathsheoltóir gorm dubh.

 

Zinc oxide ceramic semiconductor manufacturing method:

Add appropriate amount of other oxides or salts, such as Bi2O3, Sb2O3, Co2O3, MnO, Cr2O3, Al2O3 or Al(NO3)2, as additives to zinc oxide for ceramic semiconductors, and form and sinter according to the general ceramic process to produce Zinc oxide semiconducting porcelain, its conductivity is between the conductor and the insulator.

 

Items

míreanna

Zinc oxideï¼ZZ0 á ríomh mar ábhar tirim)% â ‰ ¥

99.7

Ocsaíd photaisiam (K)% â ‰ ¤

0.001

Sodium oxide(K)%≤

0.001

Ocsaíd ferric (Fe)% â ‰ ¤

0.002

Ocsaíd chaidmiam (Cd)% â ‰ ¤

0.001

Ocsaíd luaidhe LeadPbï¼ ‰% â ‰ ¤

0.005

Ocsaíd chopair (Cu)% â ‰ ¤

0.0002

Metal content(as Zn)% ≤

NÍL

moisture%

0.3

Insoluble Matter in Hci %  ≤

0.004

Loss on ignition % ≤

0.2

PH

7.0-8.0

Meánmhéid na gcáithníní(D50) um â ‰ ¤

0.5

Iarmhar ar criathar (44um)% â ‰ ¤

0.1

 

 

Is féidir go leor feidhmeanna éagsúla a bheith ag criadóireacht ocsaíd since atá déanta as ocsaíd since do leathsheoltóirí ceirmeacha:

1. Zinc oxide semiconductor ceramics with additives such as Bi2O3 or Pr2O3 and unsaturated transition metal oxides Co2O3 and MnO2 have excellent non-linear volt-ampere characteristics, and high resistance at low voltage. After the voltage increases to a certain value, the porcelain body becomes It can pass through a good conductor with a transient current density of 102~103A/cm2. Its volt-ampere characteristic is generally expressed by I∝Uα, and the non-linear index α can be greater than 30; this ceramic is called a pressure-sensitive zinc oxide ceramic. The varistor made of varistor zinc oxide ceramic is an important device for overvoltage protection in the field of electrical technology.

2. Add SnO, ZrO2, Ga2O3, etc. to make porous ceramics. The pores are equivalent to an open capillary structure. The specific surface area is large. It can adsorb or condense water vapor and other gases. Depending on the added ingredients, it can be made into moisture sensitive or H2, CO and other sensitive ceramic sensitive devices.

3. Used as a catalyst for chemical reactions. Zinc oxide ceramics are simple in technology, stable in performance, and rich in raw materials. It is an industrial material with important development prospects.

 

 

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