BORON NITRIDE CERAMICS AND MOLTEN METAL CONTAINER COMPOSED OF MEMBERS MADE OF SAID CERAMICS

Title:

BORON NITRIDE CERAMICS AND MOLTEN METAL CONTAINER COMPOSED OF MEMBERS MADE OF SAID CERAMICS

Document Type and Number:

WIPO Patent Application WO1988008831

Kind Code:

A1

Abstract:

Ceramics having excellent resistance against fusing damages due to molten metal or other inorganic material are disclosed. When in contact with a molten material such as molten metal or glass, members made of conventional boron nitride (BN) ceramics are easily damaged at the contact portion. The resistance against molten materials can be markedly improved by adding aluminum nitride (AlN) in an amount of 1 AlN < 50 wt % to BN ceramics containing at least 50 wt % of BN component. The strength of BN ceramics is much more improved by further adding 1.0 to 10.0 wt % of Y2?O3? based on the AlN content. A protective cap of a thermocouple made of said ceramics shows excellent durability against molten metal and enables continuous measurement of the temperature of the molten metal.

Inventors:

NAKASHIMA MASAZUMI (JP)
KUSUMOTO MITSUNORI (JP)
KURITA SUMIHIKO (JP)
NAKAMURA HIROSHI (JP)
URA KATSUMI (JP)
MURATA AKIRA (JP)

Application Number:

PCT/JP1988/000453

Publication Date:

November 17, 1988

Filing Date:

May 12, 1988

Export Citation:

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Assignee:

KORANSHA KK (JP)

International Classes:

C03B5/167; C04B35/583; F27B14/08; F27B14/10; F27D1/00; F27D21/02; F27D21/00; (IPC1-7): C04B35/58

Foreign References:

JPS56164075A	1981-12-16
JPH06131360A	1994-05-13
JPH04959809A

Other References: