- 12
- Nov
Ukujongana njani nobumnyama bomaleko wangaphakathi webhodi yePCB enemigangatho emininzi ilula kakhulu?
Indima yobumnyama: ukugqithiswa kwendawo yobhedu; phucula uburhabaxa bomgangatho wangaphakathi wefoyile yobhedu, ngokwenjenjalo uphucula amandla okudibanisa phakathi kweresin epoxy. Ibhodi PCB kunye nocweyo lwangaphakathi lwefoyile yobhedu;
Ukomelela kwamandla
Indlela ye-oxidation emnyama yonyango ngokubanzi lwangaphakathi lwebhodi ye-PCB ye-multilayer:
PCB ibhodi multilayer unyango oxidation emnyama
PCB multilayer ibhodi brown oxidation indlela
PCB ibhodi multilayer iqondo eliphantsi blackening indlela
Ibhodi ye-PCB ye-multilayer ithatha ubushushu obuphezulu bendlela yokwenza i-blackening, ibhodi yangaphakathi yebhodi iya kuvelisa uxinzelelo oluphezulu lobushushu (uxinzelelo lwe-thermal), olunokuthi lubangele ukwahlukana kwamaleko emva kwe-lamination okanye i-crack ye-foil yobhedu yangaphakathi;
1. Brown oxidation:
Imveliso yonyango olumnyama lwe-oxidation yeebhodi ezininzi ze-PCB abavelisi ikakhulu yi-copper oxide, akukho nto ibizwa ngokuba yi-cuprous oxide. Le yezinye iimbono eziphosakeleyo kwishishini. Emva kohlalutyo lwe-ESCA (uhlalutyo lwekhemikhali olukhethekileyo lwe-electro), umahluko phakathi kwe-athomu zobhedu kunye ne-athomu ye-oxygen inokumiselwa. Amandla okubopha, umlinganiselo phakathi kweeathom zobhedu kunye neeathom ze-oksijini kumphezulu we-oxide; idatha ecacileyo kunye nohlalutyo lokuqwalasela lubonisa ukuba imveliso ye-blackening yi-copper oxide, kwaye akukho nxalenye enye;
Ukwakheka ngokubanzi kolwelo olumnyama:
I-oxidizing agent ye-sodium chlorite
I-PH buffer trisodium phosphate
Isodiyam hayidroksayidi
Isisenzi
Okanye isisombululo sobhedu se-carbonate ammonia (25% yamanzi ammonia)
2. Idatha efanelekileyo
1. Amandla e-Peel (amandla e-peel) i-1oz i-foil yobhedu ngesantya se-2mm / min, ububanzi be-foil yobhedu yi-1/8 intshi, kwaye amandla okuqina kufuneka abe ngaphezu kwe-5 pounds / intshi.
2. Ubunzima be-oxide (ubunzima be-oxide); inokulinganiswa ngendlela ye-gravimetric, ngokuqhelekileyo ilawulwa kwi-0.2-0.5mg / cm2
3. Izinto ezibalulekileyo ezichaphazela amandla okukrazula ngokuhlalutya okuguquguqukayo okufanelekileyo (ANDVA: uhlalutyo lokuguquguquka) lu:
①Uxinzelelo lwesodium hydroxide
②Uxinzelelo lwe-sodium chlorite
③Intsebenziswano phakathi kwe-trisodium phosphate kunye nexesha lokuntywiliselwa
④Intsebenziswano phakathi kwe-sodium chlorite kunye ne-trisodium phosphate concentration
Amandla okukrazula kuxhomekeke ekuzalisweni kwe-resin kwisakhiwo sekristale ye-oxide, ngoko ke ihambelana neeparitha ezifanelekileyo ze-lamination kunye neempawu ezifanelekileyo ze-resin pp.
Ubude be-crystals ye-acicular ye-oxide yi-0.05mil (1-1.5um) njengeyona nto ibhetele, kwaye amandla okukrazula ngeli xesha nawo akhulu kakhulu;