Aqueous processing of SiAlON powders.

• Autorzy: Kudyba A. , Serkowski S. , Hintzen H.T. , Metselaar R.
• Konferencja: AMT'98 XVth Physical Metallurgy and Materials Science Conference 'Advanced Materials & Technologies', 17-21 May, 1998, Kraków-Krynica, Poland
• Języki publikacji: EN

Abstrakty

EN

To manipulate and understand the suspension behaviour in water of carbothermally prepared Ca-alpha-SiAlON and beta-SiAlON powders, to be processed by slip casting, different characterization methods were applied. These concerned: zeta potential, ESA, rheological sedimentation and floc size measurements. The best deflocculation was found at pH 10-11 where both investigated powders showed the lowest viscosity (below 10 MPa's), the lowest sediment volumes and the highest absolute of zeta potentials. At this pH the suspensions where considered to have the most favourable condition for this chosen process. The powders showed similar suspension behaviour (viscosity, behaviour, sedimentation behaviour, isoelectric points) suggesting similar surface characteristics probably due to resemblance of the surface due to oxidation treatment after carbothermal synthesis. Rheometry and zeta potential were found to be fast techniques providing the most useful and complete information of slip behaviour allowing a good choice of suspension parameters.

Słowa kluczowe

EN

powder mixture; kaolin; oxide; suspension; synthesis; measurement; rheometr; zeta potential; sedimentation; izoelectric point

PL

mieszanina proszków; kaolin; tlenek; zawiesina; synteza; pomiar; reometr; potencjał zeta; potencjał elektrokinetyczny; osadzanie; punkt izoelektryczny

• Wydawca: Wydawnictwo SIGMA-NOT
• Czasopismo: Inżynieria Materiałowa
• Rocznik: 1998
• Tom: R. XIX, nr 4
• Strony: 1268--1271

Twórcy

autor

Kudyba A.

autor

Serkowski S.

autor

Hintzen H.T.

autor

Metselaar R.

• Silesian Technical University, Katowice