2002 mechanical properties, thermal properties

mechanical properties, thermal propertiesD 3000

10 - 009MgSiN2 Addition as a Means of Increasing the Thermal Conductivityof β-Silicon Nitride. — Sintering β-Si3N4 powders under additionof Yb2O3 and MgSiN2 at 1900 ◦C for 2–48 h under 0.9 MPa N2 pressureimproves the thermal conductivity of the ceramics. The samples show a highthermal conductivity of ≈140 W(mK)−1. The high thermal conductivity isattributed to both the purification of Si3N4 grains by a solution–reprecipitationprocess and the enhanced grain growth resulting in a microstructure with largergrains contacting each other. — (HAYASHI, HIROYUKI; HIRAO, KIYOSHI;TORIYAMA, MOTOHIRO; KANZAKI, SHUZO; ITATANI, KIYOSHI; J. Am.Ceram. Soc. 84 (2001) 12, 3060-3062; Synergy Mater. Res. Cent., Natl. Inst.Adv. Ind. Sci. Technol., Nagoya 463, Japan; EN)

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