Kurosaki Refractories Co., Ltd.

Krosaki Corporation

Hiroshi Kubota

Haruyuki Ueno

Kazushige Fukuda

Yuji Katsura

Tokuaki Hatta

Takashi Hamamatu

Yusuke Urita

Mitsuo Sugawara

Minoru Kataoka

Kazuhiro Furuta

A castable refractory which comprises a matrix, making up 100 wt % in total, composed of 3-20 wt % of magnesia clinker having a particle diameter smaller than 0.21 mm and containing more than 95 wt % of MgO and 0.5-3.0 wt % of alumina cement in terms of CaO, with the remainder being alumina, and 0.1-3 wt % of ultrafine powder of amorphous silica and 3-9 wt % of alumina coarse grains having a particle diameter of 8-20 mm, both in terms of outer percentage of the amount of the matrix.

Castable refractory containing alumina coarse grains

A castable refractory which comprises a matrix, making up 100 wt % in total, composed of 3-20 wt % of magnesia clinker having a particle diameter smaller than 0.21 mm and containing more than 95 wt % of MgO and 0.5-3.0 wt % of alumina cement in terms of CaO, with the remainder being alumina, and 0.1-3 wt % of ultrafine powder of amorphous silica and 41-100 wt % of alumina coarse grains having a particle diameter of 10-50 mm, both in terms of outer percentage of the amount of the matrix.

Castable refractory rich with alumina coarse grains

Flaky .beta.-SiC mainly composed of .beta.-SiC which is obtained from an organic silicon polymer containing the carbon and silicon atoms as the major skeletal component and the method for producing such flaky .beta.-SiC are disclosed. Such .beta.-SiC is especially utilized as the starting material for ceramics having a laminar structure as well as for the refractories. The ceramics and refractories provided with such .beta.-SiC have excellent resistance to thermal shock, to thermal fatigue as well as to oxidation.

Refractories with flaky .beta.-silicon carbide

Method of making flaky .beta.-SiC

Flaky .beta.-silicon carbide and ceramics having laminar structure

A SiC-Si.sub.3 N.sub.4 composite system for special heat-resisting ceramic materials which is fabricated by firing in a nitriding gas atmosphere a green compact prepared from and composed of, as starting materials, silicon powder and an organic silicon polymer containing carbon and silicon atoms as the major skeletal components, whereby said composite system, as a final fired compact has an interwoven texture of SiC and Si.sub.3 N.sub.4 with sufficient micro gaps to absorb thermal stresses, wherein the quantitative ratio by weight of SiC to Si.sub.3 N.sub.4 in said composite system being in the range of 5%-20%:95%-80%.

SiC-Si.sub.3 N.sub.4 Composite system for special heat-resisting ceramic

Growing community of inventors

Kitakyushu, Japan

Hiroshi Kubota