Composition For Preparing Ceramic Fiber And A Biosoluble Ceramic Fiber Prepared Therefrom For Heat Insulating Material At High Temperature

Abstract

The present invention relates to a composition for preparing ceramic fiber and a biosoluble ceramic fiber prepared therefrom for heat insulating material at high temperature, more specifically, a composition for preparing ceramic fiber comprising SiO₂ as a network-forming oxide, CaO and MgO as modifier oxides, and ZrO₂, Al₂O₃ and B₂O₃ as intermediate oxides with appropriate ratios, which improves the solubility of the ceramic fiber in artificial body fluid; shows good thermal/mechanical properties such as heat resistance, high-temperature viscosity, compressive strength and restoration when used at a high temperature of 1260° C.; and provides an economic effect that a ceramic fiber can be prepared easily by using the existing facilities, and a biosoluble ceramic fiber prepared therefrom for heat insulating material at high temperature.

Description

TECHNICAL FIELD[0001]The present invention relates to a composition for preparing ceramic fiber and a biosoluble ceramic fiber prepared therefrom for heat insulating material at high temperature, more specifically, a composition for preparing ceramic fiber comprising SiO2 as a network-forming oxide, CaO and MgO as modifier oxides, and ZrO2, Al2O3 and B2O3 as intermediate oxides with appropriate ratios, which improves the solubility of the ceramic fiber in artificial body fluid; shows good thermal / mechanical properties such as heat resistance, high-temperature viscosity, compressive strength and restoration when used at a high temperature of 1260° C.; and provides an economic effect that a ceramic fiber can be prepared easily by using the existing facilities, and a biosoluble ceramic fiber prepared therefrom for heat insulating material at high temperature.BACKGROUND ART[0002]In general, ceramic fibers are used as a raw material of lagging materials, cold-insulating materials, heat-i...

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Benefits of technology

[0038]According to the present invention, it is possible to obtain a biosoluble ceramic fiber particularly suitable for heat insulating material at high temperature because it can decrease the harmfulness to the human body since it has a remarkably improved solubility in an artificial body fluid as compared with conventional ceramic fibers and thus is easily removable when inhaled into the lungs of a human, and it has an excellent stability at high temperature and excellent mechanica

Problems solved by technology

Furthermore, said fibers can result in a low-solubility problem in a physiological medium because their content of Al2O3 exceeds 4%.

According to the recent research materials, it has been reported that, if the crushing pieces of fibers having low solubility in a physiological medium are inhaled and accumulated into the lungs through respiration, it could injure a person's health.

However, said compositions are limited in that it is impossible to use them as a biodegradable material at a high temperature of 1000° C. or higher because: the fibers produced therefrom ha

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