Ibikoresho bya Ceramic

Ibiranga:

Kurwanya ubukorikori hamwe nubutaka bwa semiconductor ni nka 10-5 ~ 107ω.cm, kandi imitungo ya semiconductor yibikoresho bya ceramic irashobora kuboneka ukoresheje doping cyangwa igatera inenge ya latike iterwa no gutandukana kwa stoichiometric. Ubukorikori bukoresheje ubu buryo burimo TiO2,

ZnO, CdS, BaTiO3, Fe2O3, Cr2O3 na SiC. Ibiranga bitandukanyesemiconductor ceramicsni uko amashanyarazi yabo ahinduka hamwe nibidukikije, bishobora gukoreshwa mugukora ubwoko butandukanye bwibikoresho bya ceramic.

Nkubushyuhe bukabije, gazi yunvikana, ubushuhe bworoshye, ubushyuhe bwumuvuduko, urumuri rworoshye nibindi byuma bifata ibyuma. Semiconductor ibikoresho bya spinel, nka Fe3O4, bivangwa nibikoresho bya spinel bitayobora, nka MgAl2O4, mubisubizo bikomeye.

MgCr2O4, na Zr2TiO4, birashobora gukoreshwa nka thermistors, bigenzurwa neza nibikoresho byo kurwanya bitandukana nubushyuhe. ZnO irashobora guhindurwa wongeyeho okiside nka Bi, Mn, Co na Cr.

Inyinshi murizo oxyde ntizishonga neza muri ZnO, ahubwo gutandukana kumupaka wintete kugirango bibe urwego rwinzitizi, kugirango ubone ibikoresho bya ceramic ZnO varistor, kandi ni ubwoko bwibikoresho bifite imikorere myiza mububumbyi bwa varistor.

Doping ya SiC (nka karubone yumuntu wumukara, ifu ya grafite) irashobora guteguraibikoresho bya semiconductorhamwe nubushyuhe bwo hejuru butajegajega, bukoreshwa nkibintu bitandukanye byo gushyushya ibintu, ni ukuvuga inkoni ya karubone ya silicon mu ziko ry’ubushyuhe bwo hejuru. Igenzura kurwanya no kwambuka igice cya SiC kugirango ugere kubintu byose wifuza

Imiterere yimikorere (kugeza kuri 1500 ° C), kongera imbaraga zayo no kugabanya igice cyambukiranya ibintu byo gushyushya bizongera ubushyuhe butangwa. Inkoni ya karubone ya silicon mu kirere izabaho reaction ya okiside, gukoresha ubushyuhe muri rusange bigarukira kuri 1600 ° C munsi, ubwoko busanzwe bwa karuboni ya karuboni

Ubushyuhe bwo gukora neza ni 1350 ° C. Muri SiC, Atome ya Si isimburwa na N atom, kubera ko N ifite electron nyinshi, hariho electron zirenze, kandi urwego rwingufu zayo ruba hafi yumurongo wo hasi kandi biroroshye kuzamuka kugeza kumurongo wogutwara, bityo rero ingufu zigihugu nanone yitwa urwego rwabaterankunga, iki gice

Abayobora ni N-semiconductor cyangwa ubwoko bwa elegitoronike. Niba Al atom ikoreshwa muri SiC kugirango isimbuze Si atom, kubera kubura electron, imbaraga zingirakamaro zumubiri zegeranye na bande ya electron electron hejuru, biroroshye kwakira electron, bityo rero yitwa kwakirwa

Urwego nyamukuru rwingufu, rusiga umwanya wubusa muri bande ya valence ishobora kuyobora electroni kuko umwanya wubusa ukora kimwe nuwitwara neza, witwa P-semiconductor cyangwa umwobo wa semiconductor (H. Sarman, 1989).