@misc{119476,
  keywords = {porous alumina ceramic decomposable microsphere, ammonium polyacrylate anionic surfactant alumina, citric acid stabilizer suspension alumina, polystyrene suspension alumina},
  author = {Birol Sonuparlak and Ilhan A. Aksay},
  title = {Manufacture of porous ceramics using decomposable polymeric microspheres, and the resultant products},
  abstract = { The title porous ceramics, having a controlled microstructure consisting of pores of predetd. size, shape, and spatial distribution, are prepd. by (a) forming a colloidal suspension of ceramic material and uniform and identical polymeric microspheres, (b) stabilizing the interaction between the microspheres and the ceramic particles, (c) consolidating the colloidal suspension by removing the liq. and forming a compact body, and (d) heating the body to decomp. the microspheres and sintering the body to obtain a porous ceramic body having multiple, evenly distributed, noncontiguous pores. These porous ceramics are useful for a variety of applications, including multilayer tape casting. A 54-vol.\% aq. α-Al2O3 suspension was prepd. using 0.5 wt.\% NH4 salt of polyacrylic acid as anion surfactant and 0.08 wt.\% (based on dry Al2O3) citric acid as a stabilizer. The suspension was treated with ultrasound to break up agglomerates with a polystyrene suspension (30-40 vol.\%), and the colloidal suspension was then slip-cast, dried, and sintered to form a single porous layer, that was slowly dried, heated to 1000{\textdegree} at 22.5{\textdegree}/h, and sintered at 1550{\textdegree} to obtain a ceramic body with controlled microstructure. [on SciFinder(R)] },
  year = {1988},
  volume = {4,777,153},
  chapter = {US},
  number = {Copyright (C) 2018 American Chemical Society (ACS). All Rights Reserved.},
  pages = {16 pp.},
  publisher = {Washington Research Foundation, USA .},
  address = {United States of America},
  isbn = {US4777153A},
  language = {eng},
}