| | SLO | ENG | Cookies and privacy

Bigger font | Smaller font

Show document Help

Title:Reactive sintering of $MnZn$ ferrites
Authors:ID Kosmač, Tomaž (Author)
ID Drofenik, Mihael (Author)
Files:.pdf Acta_Chimica_Slovenica_2001_Kosmac,_Drofenik_Reactive_sintering_of_MnZn_ferrites.pdf (441,54 KB)
MD5: C60A0520179D69DE7F057999A3479F06
 
URL http://acta-arhiv.chem-soc.si/48/48-1-101.pdf
 
Language:English
Work type:Scientific work
Typology:1.01 - Original Scientific Article
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:Reaction-formed $MnZn$ ferrite was prepared and the decrease in shrinkage after sintering due to the volume expansion accompanying iron oxidation was studied. Green compacts consisting of the milled raw oxides $Fe_2O_3$, $Mn_3O_4$, $ZnO$ and metallic iron powder were sintered at 1350 °C in air. During the first hold at 800 °C, $Fe$ was oxidized to $\alpha-Fe_2O_3$ and $Zn$ ferrite was formed. Above 1300 °C the reaction bonding was completed and $MnZn$ ferrite, exhibiting a relatively low shrinkage, was formed. The chemical reactions involved during reaction bonding were associated with a volume expansion and porosity formation, compensating for the shrinkage on sintering. Intensive milling decreases the porosity after sintering but induces the oxidation of iron, and partially removes the shrinkage compensation caused by the presence of metallic iron.
Keywords:reaction-forming, $MnZn$ ferrite, inorganic technology, ferrite ceramics, reaction bonded ceramics, sintering, iron oxides, iron
Publication status:Published
Publication version:Version of Record
Year of publishing:2001
Number of pages:str. 101-114
Numbering:Letn. 48, št. 1
PID:20.500.12556/DKUM-58173 New window
ISSN:1318-0207
UDC:66.046.44:666.593
ISSN on article:1318-0207
COBISS.SI-ID:23500037 New window
NUK URN:URN:SI:UM:DK:ZCYW9T54
Publication date in DKUM:25.08.2017
Views:1182
Downloads:112
Metadata:XML DC-XML DC-RDF
Categories:Misc.
:
Copy citation
  
Average score:(0 votes)
Your score:Voting is allowed only for logged in users.
Share:Bookmark and Share


Hover the mouse pointer over a document title to show the abstract or click on the title to get all document metadata.

Record is a part of a journal

Title:Acta Chimica Slovenica
Shortened title:Acta Chim. Slov.
Publisher:Slovensko kemijsko društvo
ISSN:1318-0207
COBISS.SI-ID:14086149 New window

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:08.04.2016

Secondary language

Language:Slovenian
Title:Reaktivno sintranje $MnZn$ feritov
Abstract:V delu poročamo o izdelavi reakcijsko vezane $MnZn$ feritne keramike z manjšim krčenjem med sintranjem zaradi povečanja volumna, ki spremlja oksidacijo kovinskega železa. Mlete mešanice praškov $Fe_2O_3$, $Mn_3O_4$ in $ZnO$ ter kovinskega železa smo stisnili v surovce in jih sintrali pri 1350 °C na zraku. Med segrevanjem se najprej oksidira železo, nastali $\alpha-Fe_2O_3$ pa reagira z $ZnO$ ob tvorbi $Zn$ ferita. Ti dve reakciji potečeta do 800 °C, v temperaturnem območju 900 °C – 1300 °C pa nastaja $MnZn$ ferit. Povečanje volumna, ki spremlja te reakcije, in razvoj poroznosti med reakcijskim sintranjem delno ali v celoti kompenzirata krčenje materiala med zgoščevanjem. Intenzivno mletje izhodnega materiala nekoliko ublaži zmanjšanje skrčka in sicer zaradi delne oksidacije kovinskega železa med mletjem in manjše poroznosti sintrane keramike.
Keywords:anorganska tehnologija, feritna keramika, reakcijsko vezane keramike, sintranje, $MnZn$ feriti, železovi oksidi, železo


Comments

Leave comment

You must log in to leave a comment.

Comments (0)
0 - 0 / 0
 
There are no comments!

Back
Logos of partners University of Maribor University of Ljubljana University of Primorska University of Nova Gorica