Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fabrication of ice-templated tubes by rotational freezing:
  microstructure, strength, and permeability   We demonstrate a facile and scalable technique, rotational freezing, to
produce porous tubular ceramic supports with radially aligned porosity. The
method is based on a conventional ice-templating process in a rotatory mold and
demonstrated here with yttria-stabilized zirconia (YSZ). We investigated the
effects of solid loading, freezing temperature, and volume of the slurry on the
microstructure, strength (o-ring test and four-point bending), and air
permeability. The results show that pore volume and pore size can be controlled
by the solid loading and freezing temperature respectively, and overall tube
thickness can be adjusted by the volume of slurry initially poured into the
mold. Decreasing pore size and pore volume increases the mechanical properties
but decreases the air permeability. These tubes could be particularly
interesting as tubular membrane supports such as oxygen transport membranes.

36
The categories of this paper are: cmp-lg
17
The categories of this paper are: q-fin
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
2
The categories of this paper are: math
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th
35
The categories of this paper are: mtrl-th
21
The categories of this paper are: adap-org