2004
DOI: 10.1557/jmr.2004.0097
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A Thermo-Chemical Surface Treatment of AlN Powder for the Aqueous Processing of AlN Ceramics

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Cited by 20 publications
(46 citation statements)
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“…These results are according to other values reported in literature. 21 Figure 1(b) shows that adding 1 wt% anionic dispersant Duramax 3005 caused significant shifts in the values of pH IEP toward the acidic range, especially in the case of sintering additives. At the inherent pH of the suspensions (pH ∼8.5), the dissociated polyanionic groups will strongly adsorb at the surface of the positively charged particles of CaF 2 and YF 3 powders, reversing the surface charge signal.…”
Section: B Dispersing Ability Of the Powders And Characterization Ofmentioning
confidence: 98%
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“…These results are according to other values reported in literature. 21 Figure 1(b) shows that adding 1 wt% anionic dispersant Duramax 3005 caused significant shifts in the values of pH IEP toward the acidic range, especially in the case of sintering additives. At the inherent pH of the suspensions (pH ∼8.5), the dissociated polyanionic groups will strongly adsorb at the surface of the positively charged particles of CaF 2 and YF 3 powders, reversing the surface charge signal.…”
Section: B Dispersing Ability Of the Powders And Characterization Ofmentioning
confidence: 98%
“…The powder was thermochemically treated with aluminium di-hydrogenphosphate (Bindal A, TKI, Hrastnik, Slovenia) species following a procedure reported elsewhere. 21 The aim was to deagglomerate them and reduce their particle sizes as much as possible to enhance the degree of homogeneity and obtain a good distribution of the sintering additives in aqueous suspensions of AlN. A polyacrilic acid (Duramax 3005, Rohm and Haas, Lauterbourg, France) was used as the dispersant.…”
Section: A Materials and Characterization Techniquesmentioning
confidence: 99%
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“…Formic acid was added to adjust the pH value to about 4 for AlN and Al 2 O 3 particles and pH 3 for MgO particles to reach the higher zeta-potential [25,26]. A silane coupling agent (SCA) was added to the solution for functionalization of the particles and the solution underwent further sonication to allow hydrolysis and silanol formation.…”
Section: Materials and Sample Preparationmentioning
confidence: 99%