WO2013179330A1 - Si-Mg系無機繊維及びその組成物 - Google Patents
Si-Mg系無機繊維及びその組成物 Download PDFInfo
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- WO2013179330A1 WO2013179330A1 PCT/JP2012/003463 JP2012003463W WO2013179330A1 WO 2013179330 A1 WO2013179330 A1 WO 2013179330A1 JP 2012003463 W JP2012003463 W JP 2012003463W WO 2013179330 A1 WO2013179330 A1 WO 2013179330A1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L59/028—Composition or method of fixing a thermally insulating material
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C13/00—Fibre or filament compositions
- C03C13/06—Mineral fibres, e.g. slag wool, mineral wool, rock wool
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/062—Glass compositions containing silica with less than 40% silica by weight
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/083—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound
- C03C3/085—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/083—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound
- C03C3/085—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
- C03C3/087—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal containing calcium oxide, e.g. common sheet or container glass
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2213/00—Glass fibres or filaments
- C03C2213/02—Biodegradable glass fibres
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/20—Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
- Y02P60/21—Dinitrogen oxide [N2O], e.g. using aquaponics, hydroponics or efficiency measures
Definitions
- the present invention relates to a Si—Mg based inorganic fiber excellent in biosolubility and a composition for obtaining the inorganic fiber.
- Asbestos has been used as, for example, a heat-resistant sealing material because it is lightweight, easy to handle and excellent in heat resistance.
- asbestos is inhaled by the human body and causes illness in the lungs, so its use is prohibited.
- ceramic fibers and the like are used. Ceramic fibers and the like have high heat resistance comparable to asbestos, and it is considered that there is no health problem if they are handled appropriately, but there is a trend that requires more safety. Therefore, various biosoluble fibers have been developed aiming at biosoluble inorganic fibers that do not cause problems or are unlikely to occur even when inhaled by the human body (for example, Patent Documents 1 and 2).
- conventional inorganic fibers are secondary-processed into shaped products and irregular shaped materials together with various binders and additives, and joint materials in furnaces such as heat treatment equipment, industrial kiln furnaces, incinerators, It is used as a joint material, a sealing material, a packing material, a heat insulating material, and the like for filling gaps such as refractory tiles, heat insulating bricks, iron skin, and mortar refractories. Therefore, it is often exposed to high temperatures during use, and preferably has heat resistance.
- alumina is often used as a member in the furnace, and there is a problem that the fibers contained in the secondary processed product react with the alumina and the secondary processed product or member adheres or melts. .
- An object of the present invention is to provide an inorganic fiber having high solubility in physiological saline having a pH of 4.5 and a composition for obtaining the inorganic fiber.
- the following inorganic fiber composition and inorganic fiber are provided.
- the composition for inorganic fibers which has the following compositions and does not contain a solvent, and inorganic fiber.
- a method for producing an inorganic fiber wherein the melted composition for inorganic fiber according to 1 is made into a fiber.
- the composition for inorganic fibers which has the following composition 1 or composition 2, and inorganic fiber.
- composition 1 SiO 2 1.0 to 21.5% by weight Al 2 O 3 24.0 wt% or more and less than 58.0 wt% MgO 1.0 to 57.0 wt% Less than 7.4% by weight of CaO
- Composition 2 SiO 2 1.0 to 22.0% by weight Al 2 O 3 58.0 wt% or more and 79.0 wt% or less MgO 19.2-41.0 wt% 4. Less than 7.4% by weight of CaO 5.
- the composition for inorganic fibers which has the following composition 3 or composition 4, and inorganic fiber.
- composition 3 SiO 2 1.0-54.5% by weight Al 2 O 3 less than 58.0% by weight MgO 3.0 to 69.0% by weight CaO 6.0 wt% or less The total of SiO 2 , Al 2 O 3 , and MgO exceeds 94.0 wt%
- Composition 4 SiO 2 30.0 to 41.0% by weight Al 2 O 3 58.0 to 69.0 wt% MgO 1.0-12.0 wt% CaO 6.0 wt% or less The total of SiO 2 , Al 2 O 3 and MgO exceeds 94.0 wt%.
- an inorganic fiber having high solubility in physiological saline having a pH of 4.5 and a composition for obtaining the inorganic fiber it is possible to provide an inorganic fiber having high solubility in physiological saline having a pH of 4.5 and a composition for obtaining the inorganic fiber.
- FIG. 10 is a diagram showing the composition of the fibers produced in Example 18.
- 10 is a SEM photograph of fibers produced in Example 18.
- 20 is an unheated XRD chart of sample A and fiber A produced in Example 19. It is the XRD chart after the heating of the sample A produced in Example 19, and the fiber A.
- FIG. CaO experimented with Experimental Example 1 is a diagram showing the relationship of the amount and volume shrinkage of Na 2 O, Fe 2 O 3 . It is a diagram showing the relationship of the amount and volume shrinkage of Na 2 O of an experiment in Experimental Example 1.
- composition for inorganic fibers of the present invention has the following composition. SiO 2 1.0-54.5% by weight Al 2 O 3 less than 58.0 wt% MgO 1.0-69.0 wt% CaO 6.0 wt% or less Total of SiO 2 , Al 2 O 3 and MgO exceeds 94.0 wt%
- Said composition can be made into the following compositions. SiO 2 4.0 to 54.5% by weight Al 2 O 3 less than 58.0% by weight MgO 4.0 to 64.0% by weight CaO less than 6.0% by weight
- the inorganic fiber composition of the present invention has any one of the following compositions 1 to 4.
- Composition 1 SiO 2 1.0 to 21.5% by weight Al 2 O 3 24.0 wt% or more and less than 58.0 wt% MgO 1.0 to 57.0 wt% Less than 7.4% by weight of CaO
- Composition 2 SiO 2 1.0 to 22.0% by weight Al 2 O 3 58.0 wt% or more and 79.0 wt% or less MgO 19.2-41.0 wt% Less than 7.4% by weight of CaO
- Composition 3 SiO 2 1.0-54.5% by weight Al 2 O 3 less than 58.0% by weight MgO 3.0 to 69.0% by weight CaO 6.0 wt% or less
- the total of SiO 2 , Al 2 O 3 , and MgO exceeds 94.0 wt%
- Composition 4 SiO 2 30.0 to 41.0% by weight Al 2 O 3 58.0 to 69.0 wt% MgO 1.0-1
- the composition 1 can be the following composition. SiO 2 1.0 to 21.5% by weight Al 2 O 3 29.0 wt% or more and less than 58.0 wt% MgO 4.0 to 52.0 wt% CaO less than 6.0% by weight
- the composition 3 can be the following composition. SiO 2 6.0 to 54.5% by weight Al 2 O 3 less than 58.0% by weight MgO 8.0 to 64.0% by weight CaO less than 6.0% by weight
- SiO 2 14.0 to 24.0% by weight Al 2 O 3 29.0-39.0 wt% MgO 42.0-52.0 wt%
- Said composition can be made into the following compositions. SiO 2 44.0-54.0% by weight Al 2 O 3 33.0-43.0 wt% MgO 8.0-18.0 wt%
- the following compositions are preferable. SiO 2 17.0 to 21.5% by weight Al 2 O 3 63.0 wt% or more and less than 58.0 wt% MgO 5.0-15.0 wt%
- the following compositions are preferable. SiO 2 36.0-54.5% by weight Al 2 O 3 0.0-10.0 wt% MgO 44.0-64.0 wt%
- Said composition can be made into the following compositions. SiO 2 41.0-51.0 wt% Al 2 O 3 0.0 to 3.0% by weight MgO 49.0-59.0 wt%
- the following compositions are preferable. SiO 2 6.0 to 16.0% by weight Al 2 O 3 46.0-56.0 wt% MgO 33.0-43.0 wt%
- SiO 2 is 5.0 wt% or more, 8.0 wt% or more, or 10.0 or as a weight percent or more. SiO 2 may be less than 53.0 wt%, or 39.0 wt%.
- Al 2 O 3 may be 3.0% by weight or more, 5.0% by weight or more, or 8.0% by weight or more. Al 2 O 3 may be 74.0% by weight or less.
- MgO may be more than 1.0% by weight, 5.0% by weight or more, 7.0% by weight or more, 20.0% by weight or more, or 21.0% by weight or more. MgO may be 63.0 wt% or less, or 60.0 wt% or less.
- CaO is good also as 7.0 weight% or less, 5.0 weight% or less, 2 weight% or less, or 1 weight% or less.
- MgO is preferably 30% by weight or more, 36.5% by weight or more, or 38.0% by weight or more.
- SiO 2 is preferably 20.0% by weight or more, or 26.0% by weight or more.
- Al 2 O 3 is preferably 34.0% by weight or more, 43.0% by weight or more, or 56.0% by weight or more.
- MgO is preferably 24.0% by weight or less, 23.8% by weight or less, 21.5% by weight or less, or 21.0% by weight or less.
- the total of SiO 2 , Al 2 O 3 , and MgO may be 85 wt% or more, 90 wt% or more, 93 wt% or more, 95 wt% or more, 98 wt% or more, 99 wt% or more, or 100 wt%.
- the rest other than the specified components is oxides or impurities of other elements.
- the composition of the present invention comprises a respective oxide selected from Sc, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y or mixtures thereof. May or may not be included.
- the amount of these oxides is 10 wt% or less, 5.0 wt% or less, 3 wt% or less, 2 wt% or less, 1.0 wt% or less, 0.5 wt% or less, 0.2 wt%, respectively. Or 0.1% by weight or less.
- Each of the alkali metal oxides may or may not be contained, or each or a total of 10% by weight or less, 5.0% by weight or less, 3% by weight %, 2%, 1.0%, 0.5%, 0.2% or 0.1% by weight.
- the alkali metal oxide may be less than 5 mol%.
- Potassium oxide may be less than 12 mol% or less than 5 mol%.
- Each of TiO 2 , ZnO, B 2 O 3 , P 2 O 5 , CaO, SrO, BaO, Cr 2 O 3 , ZrO 2 , Fe 2 O 3 may or may not be included, and each has a weight of 10 % Or less, 5.0% or less, 3% or less, 2% or less, 1.0% or less, 0.5% or less, 0.2% or less, or 0.1% or less Can do.
- the total of CaO, Na 2 O, and Fe 2 O 3 can be 2 wt% or less, 1 wt% or less, or 0.5 wt% or less.
- the amount of each component of the above composition may be arbitrarily combined.
- composition of the present invention usually does not contain the following substances, or even contains them at 1.0% or less, 0.5% or less, 0.2% or less or 0.1% or less, respectively.
- Inorganic fibers can be obtained from the composition of the present invention.
- Inorganic fibers can be produced by a known method such as a melting method or a sol-gel method, but the melting method is preferred because of its low cost.
- a raw material melt is produced by a normal method, and the melt is made into a fiber.
- Solvent is not included.
- it can be manufactured by a spinning method in which a melted raw material is poured onto a wheel rotating at high speed, and a blow method in which the melted raw material is fiberized by applying compressed air.
- the fiber may be coated with a known coating material or may not be coated.
- the fiber of the present invention is the same as the composition of the raw material, and by having the above composition, it has excellent solubility in physiological saline having a pH of 4.5.
- the solubility in physiological saline at pH 4.5 is preferably 3.5 mg / g or more, more preferably 5.0 mg / g or more, and even more preferably 6.3 mg / g or more, according to the measurement method of the example.
- the solubility of the fiber can also be measured by the following method.
- the fiber is placed on a membrane filter, pH 4.5 physiological saline is dropped on the fiber by a micropump, and the filtrate that has passed through the fiber and filter is stored in a container.
- the accumulated filtrate is taken out after 24 and 48 hours, and the eluted components are quantified with an ICP emission spectrometer, and the solubility and dissolution rate constant are calculated.
- the measurement element can be three elements of Al, Ca, and Mg which are main elements.
- the fiber diameter may be measured and converted to a dissolution rate constant k (unit: ng / cm 2 ⁇ h), which is an elution amount per unit surface area / unit time.
- the fiber of the present invention preferably has low alumina reactivity.
- Alumina reactivity is a measurement method according to the example, preferably having a mark but not adhering, more preferably not adhering and without a mark.
- the fibers of the present invention preferably have heat resistance at 800 ° C or higher, 1000 ° C or higher, 1100 ° C or higher, 1200 ° C or higher, 1300 ° C or higher, 1400 ° C or higher.
- the volume shrinkage (%) obtained by heating a cylindrical sample having a diameter of about 7 mm and a height of about 15 mm at a predetermined temperature of 800 to 1400 ° C. for 8 hours is 40% or less at 1400 ° C. for 8 hours. , Preferably 30% or less, more preferably 23% or less, and most preferably 15% or less. It is 40% or less, preferably 30% or less, more preferably 23% or less, and most preferably 15% or less at 1300 ° C. for 8 hours.
- the heat shrinkage rate of the fiber can be measured before and after producing a blanket from the fiber and firing it at 1100 ° C. and 1260 ° C. for 24 hours.
- the tensile strength can be measured with a universal testing machine.
- the fiber of the present invention since the fiber of the present invention has few kinds of essential components, the number of man-hours for the blending process is reduced and the cost is reduced. In addition, the fact that there are few kinds of components for adjusting delicate blending amounts reduces the difficulty of production.
- Examples 1 to 17 and Comparative Example 1 The fiber composition shown in Table 1 was examined as follows. First, the raw materials were mixed so as to have the composition shown in Table 1, and pressed to obtain a molded body. The molded product was melted by heating and rapidly cooled to obtain a sample. Using this sample, the following method was used for evaluation. The results are shown in Table 1.
- Biosolubility 1 g of a sample was placed in an Erlenmeyer flask (volume: 300 mL) containing 150 mL of pH 4.5 physiological saline. This flask was placed in an incubator at 37 ° C., and horizontal vibration at 120 revolutions per minute was continued for 2.5 hours. Thereafter, the amount (mg) of each element contained in the filtrate obtained by filtration was measured with an ICP emission spectrometer, and the total was taken as the elution amount (mg / sample 1 g).
- Alumina reactivity A sample was molded to obtain a cylindrical sample having a diameter of about 7 mm and a thickness of about 5 mm. This cylindrical sample was placed on an alumina plate and heated at 1400 ° C. for 8 hours to observe the presence or absence of adhesion or melting. It was 4 when the cylindrical sample was melted, 3 when it was adhered, 2 when it was not adhered but remained, and 1 when it was not adhered and remained.
- Comparative Example 2 A ceramic fiber (conventional heat-resistant inorganic fiber) containing 47% by mass of SiO 2 and 52% by mass of Al 2 O 3 was evaluated in the same manner as in Example 1. The results are shown in Table 1.
- Example 18 The composition of SiO 2 , Al 2 O 3 , and MgO is the composition indicated by ⁇ in the triangular diagram of FIG. 1, and CaO was produced from the composition for inorganic fibers of 2% by weight or less by a melting method.
- the black squares in the triangular diagram are manufactured in Examples 1 to 17.
- the quality of the fiber was good or acceptable.
- FIG. 2 shows an SEM photograph of the obtained fiber (SiO 2 44.1 wt%, Al 2 O 3 39.9 wt%, MgO 15.4 wt%).
- Example 19 (1) Sample A having the composition shown in Table 2 was produced by the method of Example 1, and fiber A having the composition shown in Table 2 was produced by the method of Example 18.
- biosolubility and alumina reactivity were evaluated in the same manner as in Example 1, and heat resistance was evaluated by the following method. The results are shown in Table 2. The characteristics of Sample A and Fiber A were almost the same.
- Experimental example 1 (1) The effects of CaO, Na 2 O, and Fe 2 O 3 in the composition mainly composed of SiO 2 , Al 2 O 3 , and MgO were examined. First, the compositions A, B, and C (% by weight) shown in Table 3 were added to SiO 2 , Al 2 O 3 , and MgO with the amounts of CaO, Na 2 O, and Fe 2 O 3 added as shown in Table 4. Samples were prepared in the same manner as in Example 1, and the volume shrinkage (1400 ° C., 8 hours) was measured. The results are shown in FIG.
- the shrinkage ratio increases when CaO, Na 2 O, or Fe 2 O 3 is added. It can be seen that the shrinkage rate increases particularly when Na 2 O is added.
- the inorganic fiber of the present invention can be used for various purposes as a heat insulating material or as a substitute for asbestos.
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Abstract
Description
1.以下の組成を有する、溶媒は含まない無機繊維用組成物、及び無機繊維。
SiO2 1.0~54.5重量%
Al2O3 58.0重量%未満
MgO 1.0~69.0重量%
CaO 6.0重量%以下
SiO2、Al2O3、MgOの合計は94.0重量%超
2.溶融した1記載の無機繊維用組成物を繊維化する無機繊維の製造方法。
3.2記載の製造方法で得られる無機繊維。
4.以下の組成1又は組成2を有する無機繊維用組成物、及び無機繊維。
[組成1]
SiO2 1.0~21.5重量%
Al2O3 24.0重量%以上58.0重量%未満
MgO 1.0~57.0重量%
CaO 7.4重量%未満
[組成2]
SiO2 1.0~22.0重量%
Al2O3 58.0重量%以上79.0重量%以下
MgO 19.2~41.0重量%
CaO 7.4重量%未満
5.SiO2、Al2O3、MgOの合計が85重量%以上である4記載の無機繊維用組成物、及び無機繊維。
6.以下の組成3又は組成4を有する無機繊維用組成物、及び無機繊維。
[組成3]
SiO2 1.0~54.5重量%
Al2O3 58.0重量%未満
MgO 3.0~69.0重量%
CaO 6.0重量%以下
SiO2、Al2O3、MgOの合計は94.0重量%超
[組成4]
SiO2 30.0~41.0重量%
Al2O3 58.0~69.0重量%
MgO 1.0~12.0重量%
CaO 6.0重量%以下
SiO2、Al2O3、MgOの合計は94.0重量%超
7.組成3のSiO2、Al2O3、MgOが以下の量である6記載の無機繊維用組成物、及び無機繊維。
SiO2 14.0~51.0重量%
Al2O3 0.0~39.0重量%
MgO 42.0~59.0重量%
8.組成3のSiO2、Al2O3、MgOが以下の量である6記載の無機繊維用組成物、及び無機繊維。
SiO2 39.0~54.5重量%
Al2O3 28.0~48.0重量%
MgO 3.0~23.0重量%
9.Na2Oが2.0重量%以下である1及び4~8のいずれか記載の無機繊維用組成物、及び無機繊維。
10.4~9のいずれか記載の無機繊維用組成物から得られる無機繊維。
11.3又は10記載の無機繊維を用いて得られる定形物又は不定形物。
SiO2 1.0~54.5重量%
Al2O3 58.0重量%未満
MgO 1.0~69.0重量%
CaO 6.0重量%以下
SiO2、Al2O3、MgOの合計は94.0重量%超
SiO2 4.0~54.5重量%
Al2O3 58.0重量%未満
MgO 4.0~64.0重量%
CaO 6.0重量%未満
[組成1]
SiO2 1.0~21.5重量%
Al2O3 24.0重量%以上58.0重量%未満
MgO 1.0~57.0重量%
CaO 7.4重量%未満
[組成2]
SiO2 1.0~22.0重量%
Al2O3 58.0重量%以上79.0重量%以下
MgO 19.2~41.0重量%
CaO 7.4重量%未満
[組成3]
SiO2 1.0~54.5重量%
Al2O3 58.0重量%未満
MgO 3.0~69.0重量%
CaO 6.0重量%以下
SiO2、Al2O3、MgOの合計は94.0重量%超
[組成4]
SiO2 30.0~41.0重量%
Al2O3 58.0~69.0重量%
MgO 1.0~12.0重量%
CaO 6.0重量%以下
SiO2、Al2O3、MgOの合計は94.0重量%超
SiO2 1.0~21.5重量%
Al2O3 29.0重量%以上58.0重量%未満
MgO 4.0~52.0重量%
CaO 6.0重量%未満
SiO2 6.0~54.5重量%
Al2O3 58.0重量%未満
MgO 8.0~64.0重量%
CaO 6.0重量%未満
SiO2 14.0~24.0重量%
Al2O3 29.0~39.0重量%
MgO 42.0~52.0重量%
SiO2 39.0~54.5重量%
Al2O3 28.0~48.0重量%
MgO 3.0~23.0重量%
SiO2 44.0~54.0重量%
Al2O3 33.0~43.0重量%
MgO 8.0~18.0重量%
SiO2 17.0~21.5重量%
Al2O3 63.0重量%以上58.0重量%未満
MgO 5.0~15.0重量%
SiO2 36.0~54.5重量%
Al2O3 0.0~10.0重量%
MgO 44.0~64.0重量%
SiO2 41.0~51.0重量%
Al2O3 0.0~3.0重量%
MgO 49.0~59.0重量%
SiO2 6.0~16.0重量%
Al2O3 46.0~56.0重量%
MgO 33.0~43.0重量%
SiO2 25.0~35.0重量%
Al2O3 6.0~16.0重量%
MgO 54.0~64.0重量%
SiO2は、53.0重量%以下又は39.0重量%未満としてもよい。
Al2O3は、3.0重量%以上、5.0重量%以上、又は8.0重量%以上としてもよい。
Al2O3は、74.0重量%以下してもよい。
MgOは、1.0重量%超、5.0重量%以上、7.0重量%以上、20.0重量%以上、又は21.0重量%以上としてもよい。
MgOは、63.0重量%以下、又は60.0重量%以下としてもよい。
CaOは、7.0重量%以下、5.0重量%以下、2重量%以下又は1重量%以下としてもよい。
特定する成分以外の残りは他の元素の酸化物又は不純物等である。
酸化ゲルマニウム、酸化テルル、酸化バナジウム、酸化イオウ、リン化合物、スズ、コバルト、酸化マンガン、フッ化物、酸化銅。
無機繊維は溶融法、ゾルゲル法等公知の方法で製造できるが、低コストのため溶融法が好ましい。溶融法では、通常の方法により、原料の溶融物を作製し、この溶融物を繊維化して製造する。溶媒は含まない。例えば、高速回転しているホイール上に熔解した原料を流し当てることで繊維化するスピニング法及び熔解した原料に圧縮空気を当てることで繊維化するブロー法等により製造できる。
繊維を、メンブレンフィルター上に置き、繊維上にマイクロポンプによりpH4.5の生理食塩水を滴下させ、繊維、フィルターを通った濾液を容器内に貯める。貯めた濾液を24、48時間経過後に取り出し、溶出成分をICP発光分析装置により定量し、溶解度及び溶解速度定数を算出する。例えば、測定元素は主要元素であるAl、Ca、Mgの3元素とすることができる。尚、繊維径を測定して単位表面積・単位時間当たりの溶出量である溶解速度定数k(単位:ng/cm2・h)に換算してもよい。
表1に示す繊維組成について以下のように検討した。
まず、表1に示す組成となるように原料を混合し、プレス加工して成形体を得た。この成形体を加熱溶融し、急冷して得られた物を粉砕しサンプルを得た。このサンプルを用いて以下の方法で評価した。その結果を表1に示す。
サンプル1gを、pH4.5の生理食塩水150mLが入った三角フラスコ(容積300mL)に入れた。このフラスコを、37℃のインキュベーター内に設置して、毎分120回転の水平振動を2.5時間継続した。その後、ろ過により得られた濾液に含有されている各元素の量(mg)をICP発光分析装置により測定し、その合計を溶出量とした(mg/サンプル1g)。
サンプルを成形して、直径約7mm、厚み約5mmの円柱状サンプルを得た。この円柱状サンプルをアルミナ板に載せて、1400℃8時間加熱して、付着や溶融の有無を観察した。円柱状サンプルが溶融したときは4、付着したときは3、付着しないが痕が残ったときは2、付着もせず痕も残らないときは1とした。
SiO2を47質量%、Al2O3を52質量%含むセラミック繊維(従来の耐熱性無機繊維)について、実施例1と同様に評価した。結果を表1に示す。
SiO2、Al2O3、MgOの組成が図1の三角図の○に示す組成であり、CaOは2重量%以下の無機繊維用組成物から、熔融法により繊維を製造した。尚、三角図の黒四角は、実施例1~17で製造したものである。
繊維の品質は良好又は許容できるものであった。得られた繊維(SiO244.1重量%、Al2O339.9重量%、MgO15.4重量%)のSEM写真を図2に示す。
(1)実施例1の方法で、表2に示す組成のサンプルAを作製し、実施例18の方法で、表2に示す組成の繊維Aを作製した。
サンプルAと繊維Aについて、実施例1と同様に、生体溶解性とアルミナ反応性を評価し、耐熱性については以下の方法で評価した。結果を表2に示す。サンプルAと繊維Aの特性はほぼ一致した。
サンプルA及び繊維Aを成形して、直径約7mm、高さ約15mmの円柱状サンプルを得た。この円柱状サンプルを1400℃8時間加熱して、体積収縮率を求めた。
(1)SiO2、Al2O3、MgOを主成分とする組成における、CaO、Na2O、Fe2O3の影響を調べた。
まず表3に示す組成A,B,C(重量%)のSiO2、Al2O3、MgOに、CaO、Na2O、Fe2O3を表4に示す量を加えた組成で、実施例1と同様にサンプルを準備し、体積収縮率(1400℃8時間)を測定した。結果を図4に示す。
図5から、Na2Oの量が増えると収縮率が高くなることが分かる。
この明細書に記載の文献の内容を全てここに援用する。
Claims (11)
- 以下の組成を有し、溶媒は含まない無機繊維用組成物。
SiO2 1.0~54.5重量%
Al2O3 58.0重量%未満
MgO 1.0~69.0重量%
CaO 6.0重量%以下
SiO2、Al2O3、MgOの合計は94.0重量%超 - 溶融した請求項1記載の無機繊維用組成物を繊維化する無機繊維の製造方法。
- 請求項2記載の製造方法で得られる無機繊維。
- 以下の組成1又は組成2を有する無機繊維用組成物。
[組成1]
SiO2 1.0~21.5重量%
Al2O3 24.0重量%以上58.0重量%未満
MgO 1.0~57.0重量%
CaO 7.4重量%未満
[組成2]
SiO2 1.0~22.0重量%
Al2O3 58.0重量%以上79.0重量%以下
MgO 19.2~41.0重量%
CaO 7.4重量%未満 - SiO2、Al2O3、MgOの合計が85重量%以上である請求項4記載の無機繊維用組成物。
- 以下の組成3又は組成4を有する無機繊維用組成物。
[組成3]
SiO2 1.0~54.5重量%
Al2O3 58.0重量%未満
MgO 3.0~69.0重量%
CaO 6.0重量%以下
SiO2、Al2O3、MgOの合計は94.0重量%超
[組成4]
SiO2 30.0~41.0重量%
Al2O3 58.0~69.0重量%
MgO 1.0~12.0重量%
CaO 6.0重量%以下
SiO2、Al2O3、MgOの合計は94.0重量%超 - 組成3のSiO2、Al2O3、MgOが以下の量である請求項6記載の無機繊維用組成物。
SiO2 14.0~51.0重量%
Al2O3 0.0~39.0重量%
MgO 42.0~59.0重量% - 組成3のSiO2、Al2O3、MgOが以下の量である請求項6記載の無機繊維用組成物。
SiO2 39.0~54.5重量%
Al2O3 28.0~48.0重量%
MgO 3.0~23.0重量% - Na2Oが2.0重量%以下である請求項1及び4~8のいずれか記載の無機繊維用組成物。
- 請求項4~9のいずれか記載の無機繊維用組成物から得られる無機繊維。
- 請求項3又は10記載の無機繊維を用いて得られる定形物又は不定形物。
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JP2014518077A JP5945596B2 (ja) | 2012-05-28 | 2012-05-28 | Si−Mg系無機繊維及びその組成物 |
CN201280073521.9A CN104350019A (zh) | 2012-05-28 | 2012-05-28 | Si-Mg系无机纤维及其组合物 |
US14/402,617 US20150144828A1 (en) | 2012-05-28 | 2012-05-28 | Si-Mg-BASED INORGANIC FIBERS AND COMPOSITION CONTAINING THE SAME |
KR1020147031903A KR20150013168A (ko) | 2012-05-28 | 2012-05-28 | Si-Mg계 무기 섬유 및 그 조성물 |
PCT/JP2012/003463 WO2013179330A1 (ja) | 2012-05-28 | 2012-05-28 | Si-Mg系無機繊維及びその組成物 |
EP12878118.4A EP2857369A4 (en) | 2012-05-28 | 2012-05-28 | INORGANIC FIBER BASED ON SI-MG AND COMPOSITION CONTAINING THE SAME |
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JP2016017011A (ja) * | 2014-07-08 | 2016-02-01 | ニチアス株式会社 | 生体溶解性無機繊維 |
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WO2014062987A2 (en) * | 2012-10-18 | 2014-04-24 | Ocv Intellectual Capital, Llc | Glass composition for the manufacture of fibers and process |
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KR20150013168A (ko) | 2015-02-04 |
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EP2857369A1 (en) | 2015-04-08 |
EP2857369A4 (en) | 2016-03-23 |
CN104350019A (zh) | 2015-02-11 |
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