I-Hielscher Ultrasound Technology

Ukuxoshwa kwe-Ultrasonic kwe-silica (i-SiO2)

I-silica isetshenziselwa izimboni ezihlukahlukene ukukhishwa kwayo, ukumiswa kagesi kanye nokuqina okuphezulu okufudumele. Ukuhlakazeka kwe-ultrasonic kusiza ukusebenzisa ikhono le-silika ngokuthuthukisa ikhwalithi yokusabalalisa.

Izicelo ze-silika

I-silika (i-SiO2) a i-ceramic eminingi esebenzayo izinto ezisetshenziswayo izimboni ezihlukahlukene ukuze kuthuthukiswe izakhiwo kanye nezakhiwo zomshini wezinto ezihlukahlukene. It isetshenziswa njengendlela ukugcwalisa, ukusebenza okunezelayo, i-modifier ye-rheological noma ukusiza usizo ezinhlobonhlobo eziningi zomkhiqizo, njengezimpawu & ukugqoka, ama-plastiki, irayibhethi yokwenziwa, ama-adhesives, ama-sealants, noma izinto zokugxila. Ikakhulukazi i-silika fume (amorphous silicon dioxide) noma i-microsilica ungeze kwikhonkri ukuze uthuthukise amandla okukhonkolo nokuhlala isikhathi eside. I-flamini ye-silika iphinde isetshenziswe kwi-concrete ye-refractory yokunciphisa i-porosity nokukhulisa amandla ngokuthuthukiswa kwezinhlayiyana.

Ukusabalalisa iSililika

I-silika iyatholakala ngezici eziningi i-hydrophilic futhi i-hydrophobic amafomu futhi ngokuvamile asetshenziselwa usayizi wezinhlayiyana ezinhle kakhulu. I-silika evamile ayisakazeki kahle ngemva kokumisa. Ibuye ifake eziningi ze-microbubbles ekwakhiweni komkhiqizo.

Kuzo izicelo eziningi ze-silica, a ukuhlakazeka okuhle nokufanelana kubalulekile. Ikakhulu uma isetshenziselwa ukugqoka kanye namacac phuthukisa ukumelana nokuzikhandla, izinhlayiya ze-silika zidinga ukuba zibe mncane ngokwanele ukungaphazamisi ukukhanya okubonakalayo gwema ihaba futhi ugcine obala. Ngokudayiswa okuningi kwe-silika kudingeka ibe mncane kunama-40nm ukufeza le mfuneko. Kwezinye izinhlelo zokusebenza, i-particle agglomeration igwema izinhlayiya ze-silica ngayinye ukuze zihlangane nemidiya ezungezile.

Ukucutshungulwa kwe-Ultrasonic kuye kwafakazelwa kimi ephumelela ngokwengeziwe ekusakazeni kwe-silica kunezinye izindlela zokuxuba eziphezulu. Isithombe ngezansi sibonisa umphumela ojwayelekile wokuhlakazeka kwe-ultrasonic we-silika e-fumed emanzini. Izilinganiso zitholakala ngokusebenzisa a I-Malvern Mastersizer 2000.

Usayizi we-particle Distribution of Silica in Solution Aqueous ngaphambi nangemva kwe-Ultrasonication

Ukuqala (ijika eliluhlaza) ngosayizi wezinhlayiyana ze-agglomerate ezingaphezu kuka-200 micron (D50) iningi lalezi zinhlayiya zancishiswa zibe ngaphansi kwama-nanometer angama-200. Ukusikeka okucacile ngakwesokudla, kubangelwa ukubunjwa kwezinto ezibonakalayo (ama-agglomerates kanye nezibalo ezinkulu). Ngenkathi ama-agglomerate eyanciphisa kalula, kuthatha ukucubungula isikhathi eside ukugaya izinhlayiya ezinkulu eziyinhloko.

Ukucubungula Ukusebenza kahle ku-Silica Size Ukunciphisa

Ukusebenza kahle kwe-ultrasound ekusakazeni kwe-silica kuqhathaniswa nezinye izindlela zokuxuba eziphezulu, njenge-IKA Ultra-Turrax I-Pohl no-Schubert. I-Pohl yaqhathanisa ukunciphisa usayizi wezinhlayiyana ze-Aerosil 90 (2% wt) emanzini besebenzisa i-Ultra-Turrax (i-rotor-stator-system) ngezilungiselelo ezihlukahlukene I-UIP1000hd (idivayisi ye-ultrasonic) kumodi eqhubekayo. I-graphic engezansi ibonisa imiphumela.

Ukuqhathaniswa kwe-UltraTurrax ne-Ultrasound ekusakazelweni kwe-silika emanzini

Ngenxa yocwaningo lwakhe uPohl waphetha, lokho “Ngesikhathi esiqondile
amandla EV i-ultrasound iphumelela kakhulu kunayo
i-rotor-stator-uhlelo
.”
futhi lokho “Imvamisa ye-ultrasound esebenzayo ebangeni kusuka ku-20 kHz kuze ku-30 ​​kHz ayikho umphumela omkhulu ku-
inqubo yokusabalalisa.”

Izithombe ezansi ngezansi zikhombisa imiphumela uPohl athola ngayo ama-silica granules aphikisayo. (Chofoza ezithombeni zokubukwa okukhulu!)

Cela ulwazi oluthe xaxa!

Sicela usebenzise ifomu elingezansi, uma ufisa ukucela ulwazi olwengeziwe mayelana nokusetshenziswa kwe-ultrasound ekuhlakazeni isililika. Sizojabula ukukunikeza uhlelo lwe-ultrasonic ukuhlangabezana nezidingo zakho.









Sicela uqaphele wethu Inqubomgomo yobumfihlo.


Izincwadi

  • UMarkus Pohl, uHermar Schubert (2004): Ukusabalalisa nokusabalalisa ama-nanoparticles ngezixazululo ezinamandla, 2004 i-Partec