Change in oxygen content of Y sub 2 O sub 3 -Nd sub 2 O sub 3 -doped silicon nitride during firing

Journal Article · Thu Nov 30 23:00:00 EST 1989 · Journal of the American Ceramic Society; (USA)

DOI:https://doi.org/10.1111/j.1151-2916.1989.tb06089.x· OSTI ID:6815772

Hirosaki, N; Okada, A ^[1]

---

1. Scientific Research Lab., Central Engineering Labs., Nissan Motor Co., Ltd., Natsushima-cho-1, Yokosuka, Kanagawa (JP)

The oxygen content of silicon nitride with 1 mol% Y{sub 2}O{sub 3}-Nd{sub 2}O{sub 3} additive was measured after firing to determine the compositional change during gas-pressure sintering. Oxygen content decreases from 2.5 to 0.94 wt% during firing for 4 h at 1900{degrees}C and 10-MPa pressure in N{sub 2}. This decrease in oxygen results from the release of SiO gas generated by a thermal-decomposition reaction between Si{sub 3}N{sub 4} and SiO{sub 2}. The resultant sintered silicon nitride material contains less than 1 wt% oxygen.

• OSTI ID: 6815772
• Journal Information: Journal of the American Ceramic Society; (USA), Journal Name: Journal of the American Ceramic Society; (USA) Vol. 72:12; ISSN 0002-7820; ISSN JACTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
640302 -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ADDITIVES
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL REACTION KINETICS
DIFFUSION
ELEMENTS
KINETICS
NEODYMIUM COMPOUNDS
NEODYMIUM OXIDES
NITRIDES
NITROGEN
NITROGEN COMPOUNDS
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PNICTIDES
RARE EARTH COMPOUNDS
REACTION KINETICS
SILICON COMPOUNDS
SILICON NITRIDES
SILICON OXIDES
THERMAL DEGRADATION
TRANSITION ELEMENT COMPOUNDS
VERY HIGH TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES