초록 ▼

A raw material including SiO2,MgO and TiO2,as essential components, is melt by heating at 1700 to 2000° C. The melt is fiberized by quenching in order to obtain inorganic fiber. The obtained inorganic fiber includes SiO2,MgO and TiO2as essential components and an amorphous portion having these compo

A raw material including SiO2,MgO and TiO2,as essential components, is melt by heating at 1700 to 2000° C. The melt is fiberized by quenching in order to obtain inorganic fiber. The obtained inorganic fiber includes SiO2,MgO and TiO2as essential components and an amorphous portion having these components in its structure.

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1. An inorganic fiber consisting essentially of in percent by weight: SiO265-80%; MgO 15-28%; and TiO22-20%; wherein an amorphous portion is included in a structure of said inorganic fiber and optionally one of MnO in an amount less than 10% and ZrO2in an amount less than 10% by weight and op

1. An inorganic fiber consisting essentially of in percent by weight: SiO265-80%; MgO 15-28%; and TiO22-20%; wherein an amorphous portion is included in a structure of said inorganic fiber and optionally one of MnO in an amount less than 10% and ZrO2in an amount less than 10% by weight and optionally, as impurities, not more than 2% Al2O3,not more than 3% CaO, and additional alkali metal oxides and alkaline earth metal oxides, excluding MgO and CaO, of not more than 2%. 2. The inorganic fiber according to claim 1, wherein the content of SiO2is 65-80% by weight, the content of MgO is 15-28% by weight or less and the content of TiO2of 4-20%. 3. The inorganic fiber according to claim 2, wherein the content of SiO2is 70-80% by weight, the content of MgO is 15-28% by weight, and the content of TiO2is 4-20% by weight. 4. The inorganic fiber according to claim 1, which contains one of MnO in an amount less than 10% by weight and ZrO2in an amount less than 10% by weight. 5. A method of producing inorganic fiber comprising consisting essentially of the steps of: (a) heating a raw material including SiO2,MgO and TiO2according to claim 1 at 1700 to 20000° C. to obtain a melt; (b) fiberizing the melt by quenching. 6. An inorganic fiber consisting essentially of in percent by weight: SiO260-80%; MgO 15-30%; TiO20.5-20% and optionally one of MnO in an amount less than 10% and ZrO2in an amount less than 10% by weight and optionally, as impurities, not more than 2% Al2O3,not more than 3% CaO, and additional alkali metal oxides and alkaline earth metal oxides, excluding MgO and CaO, of not more than 2% wherein an amorphous portion is included in a structure of said inorganic fiber and said inorganic fiber has a solubility in physiological saline superior to category O of the European classification of biosolubility. 7. An inorganic fiber consisting essentially of in percent by weight: SiO260-80%; MgO 15-30%; TiO20.5-20% and optionally one of MnO in an amount less than 10% and ZrO2in an amount less than 10% by weight and optionally, as impurities, not more than 2% Al2O3,not more than 3% CaO, and additional alkali metal oxides and alkaline earth metal oxides, excluding MgO and CaO, of not more than 2% wherein an amorphous portion is included in a structure of said inorganic fiber and said inorganic fiber retains its fiberous shape when heated to 1400° C. for eight hours. 8. An inorganic fiber consisting essentially of in percent by weight: SiO260-80%; MgO 15-30%; TiO20.5-20% wherein the fiber when melted, forms two liquid phases.