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UID:pretalx-icr2024-MF3PLX@pretalx.com
DTSTART;TZID=CET:20240918T140000
DTEND;TZID=CET:20240918T142000
DESCRIPTION:Practical experience shows that the particle size distribution 
 (PSD) and the specific surface area (SSA) of their ceramic matrix signific
 antly influence the processing\, setting and sintering properties of refra
 ctory castables. However\, there is a lack of knowledge about the extent t
 o which the properties of refractory castables are influenced by changes i
 n the SSA and the PSA of the matrix of refractory castables. A better unde
 rstanding of this influence promises considerable new potential for innova
 tive refractory castables.\nThe zeta-potential of suspensions of matrix pa
 rticles (< 45 µm) was measured\, depending on the matrix’ SSA and the d
 ispersing system used. Castables based on the analysed matrices were mixed
  and investigated. Two dispersing systems were used in the refractory cast
 ables with different amounts of the dispersing agent.\nResults reveal the 
 influence on deflocculation and the first stiffening of the corresponding 
 castables. Using polycarboxylate ether (PCE) as dispersing agent\, with in
 creasing amount of the PCE the time until stiffening is elongated distinct
 ly. The same effect occurs when the SSA of the matrix is being decreased w
 hile the amount of dispersing agent remains constant. A correlation betwee
 n the moment of stiffening and the amount of dispersing agent per surface 
 area can be shown.\nUsing a polymethacrylate (PMA) in combination with cit
 ric acid as dispersing agent\, both an increase in the amounts of PMA and 
 citric acid lead to a longer time until stiffening. The role of the SSA of
  the matrix is not completely clear here.
DTSTAMP:20260307T211835Z
LOCATION:Europe Hall
SUMMARY:Influence of the ceramic matrix’ specific surface area on the def
 locculation and first stiffening of CA cement bonded refractory castables 
 - Tim Waldstädt
URL:https://pretalx.com/icr2024/talk/MF3PLX/
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