Parkhurst, Wendel & Burr
Underlying boards for firing and a method for firing ceramic moldings by using such underlying boards
 A firing underlying board having a long use life free from thermal expansion and which does not cause twisting of ribs, deformation of an end face, color change or cracking in a honeycomb structural body fired on the underlying board. The firing underlying board is composed mainly of 55-85 wt % of cordierite and 15-45 wt % of mullite. The firing underlying board is used to fire green ceramic honeycomb structural bodies placed thereon. 
NGK Insulators, Ltd.
F C F
F26B C04B F27D
inventional inventional inventional
Kyosuke Norio Yoshiaki
Tsunekawa Kato Ideguchi