Stock material or miscellaneous articles – Structurally defined web or sheet – Honeycomb-like
Reexamination Certificate
2007-11-27
2010-11-30
Xu, Ling (Department: 1784)
Stock material or miscellaneous articles
Structurally defined web or sheet
Honeycomb-like
C428S697000, C428S701000, C428S702000, C501S103000, C501S134000
Reexamination Certificate
active
07842370
ABSTRACT:
A cordierite ceramic is provided, which includes at least zirconium oxide or hafnium oxide, and also includes titanium oxide. The molar ratio of zirconium (Zr), hafnium (Hf) and titanium (Ti) in terms of the moles in the form of the dioxides, respectively which is given by the formula [(ZrO2+HfO2)/TiO2] is in a range of 0.1 to 5. In this cordierite ceramic, the phases of the components are contained mainly as zirconium titanate or hafnium titanate, and no heterogeneity in appearance, caused by change in color and generation of spots occurs. A honeycomb structure made of the cordierite ceramic is also provided.
REFERENCES:
patent: 4758542 (1988-07-01), Parker
patent: 06-172016 (1994-06-01), None
Katsuda Yuji
Ono Yohei
Ueda Shuji
Yamazaki Satoshi
Burr & Brown
NGK Insulators Ltd.
Xu Ling
LandOfFree
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