WO2001014278A1 - Procede de preparation de ceramiques a rayonnement infrarouge lointain - Google Patents

Procede de preparation de ceramiques a rayonnement infrarouge lointain Download PDF

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Publication number
WO2001014278A1
WO2001014278A1 PCT/JP2000/004119 JP0004119W WO0114278A1 WO 2001014278 A1 WO2001014278 A1 WO 2001014278A1 JP 0004119 W JP0004119 W JP 0004119W WO 0114278 A1 WO0114278 A1 WO 0114278A1
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WO
WIPO (PCT)
Prior art keywords
temperature
infrared radiation
far
raw material
resin
Prior art date
Application number
PCT/JP2000/004119
Other languages
English (en)
Japanese (ja)
Inventor
Mitsuru Sakai
Original Assignee
Shimaya Corporation
Shima Technology System Corporation
New House Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shimaya Corporation, Shima Technology System Corporation, New House Corporation filed Critical Shimaya Corporation
Priority to AU54294/00A priority Critical patent/AU5429400A/en
Publication of WO2001014278A1 publication Critical patent/WO2001014278A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/16—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay
    • C04B35/18—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay rich in aluminium oxide
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/64—Burning or sintering processes

Definitions

  • the present invention relates to a method for producing far-infrared radiation ceramics.
  • Far-infrared rays are electromagnetic waves in a specific wavelength band.
  • far-infrared rays modify water and foods or have a useful effect on human bodies, animals and plants.
  • the clusters of water molecules are subdivided to enhance the activity, thereby promoting the development of hydroponic vegetables, or irradiating far-infrared rays to beverages to enhance taste.
  • Attempts have been widely made to enhance the freshness of food in refrigerators and to radiate far-infrared rays to the human body to promote health by promoting blood circulation. For this reason, there is a demand for materials with lower cost and higher radiation efficiency of far-infrared rays.
  • the method for producing a far-infrared ceramics comprises the steps of: kneading a raw material mixture containing at least fly ash or volcanic ash, clay and binder-resin powder together with a kneading liquid to form a predetermined shape; It is characterized in that it is fired in the above non-oxidizing atmosphere so that the carbon content after firing becomes 5 to 20% by weight.
  • the binder resin added to the raw material mixture becomes carbon, in order to adjust the amount of carbon, carbon powder may be added to the raw material powder in advance and fired.
  • titanium oxide may be added to the raw material mixture.
  • the temperature is maintained at about 300 ° C. for 30 minutes or more before the temperature is raised to 700 ° C. or more (the invention of claim 4). Then, it is preferable to use a phenol resin or a ketone resin as the binder resin.
  • fly ash is coal ash discharged from thermal power plants, etc., where the inorganic components contained in the coal are melted by high-temperature combustion and become spherical glass particles due to surface tension during resolidification due to the temperature drop. Has become.
  • the particle size is generally in the range of about 1 to 200 ⁇ m, the average particle size is about 20 ⁇ m, and about 60% of the particles are in the range of 20 to 200 ⁇ .
  • the chemical compositional becomes S i ⁇ 2 (silica), A 1 2 0 3 (alumina) force '7 0-8 0%, and the other components F e, C a, M g , S , K, Na and the like are included as oxides.
  • Volcanic ash also closely resembles fly ash in physical properties and chemical composition. These physical properties and chemical composition are ideal as raw materials for far-infrared radiation ceramics, but they can be obtained at low cost.
  • a further feature is that the firing takes place in a non-oxidizing atmosphere.
  • Powdered ceramic When the raw materials are mixed and molded into a product shape, it is common practice to add a binder resin to give the powder mixture moldability. However, if the amount of the binder resin added is large, the molded product collapses into the crooked mouth during firing, so it was common sense to keep the added amount as low as possible.
  • the reason why the molded article collapses during firing is that ceramics is usually fired in the air, so that when the molded article is heated to a temperature of 200 ° C or more in the process of raising the temperature, the binder, which is an organic substance, becomes This is probably because the resin is first carbonized and then reacts with oxygen in the air to become carbon dioxide and disappears from the molded product, so that the shape of the molded product cannot be maintained. If the molded product is further heated to several hundred degrees to cause a sintering reaction between the powder raw materials and the clay, the molded product will exhibit shape retention, but before reaching such a high temperature. The molded product collapses at this temperature.
  • the binder resin when firing is performed in a non-oxidizing atmosphere as in the present invention, the binder resin is stopped only by carbonization and remains in the structure as amorphous carbon without disappearing.
  • the amorphous carbon component has a function of maintaining the shape of the molded product until the temperature at which fly ash or volcanic ash undergoes a sintering reaction with the clay component to obtain a shape-retaining property.
  • amorphous carbon generated by carbonization of a binder resin imparts high anion generating capability to fired ceramics. It is thought that the electrical conductivity and porosity of the amorphous carbon have an effect, but the details are unknown. However, in any case, if a large amount of carbon component remains in the fired ceramics, extremely high negative ion generation ability is recognized. The amount of negative ions generated can be measured by vibrating the sample in air and flowing the air through the coaxial cylindrical ion sensor. If the amount of amorphous carbon remaining in the calcined product is less than 5% by weight, the capability of generating negative ions becomes insufficient. Conversely, if the content exceeds 20% by weight, the strength of the fired product is greatly reduced.
  • Amorphous carbon in fired products originates from binder-resin,
  • carbon powder may be added in advance to the raw material mixture.
  • the carbon powder may be charcoal powder, which is a common amorphous carbon, and is preferably, for example, ground to about 200 mesh. Further, when titanium oxide is added to the raw material mixture, the amount of generated negative ions increases.
  • Clay may be a general one available as a raw material for ceramics, and has the function of bonding fly ash or volcanic ash and carbon powder to each other in the product after firing, and if it is not added, the strength of the product will be extremely low This raises practical problems.
  • the preferred compounding amount is 20 to 60% by weight, particularly preferably 30 to 50% by weight.
  • fly ash or volcanic ash or clay, etc. generally, if it is less than 20% by weight, the strength of the fired product tends to decrease, and if it exceeds 60% by weight, the porosity is low. As a result, the physical properties such as the amount of generated negative ions decrease.
  • binder resins include phenolic resins and ketone resins, and when these are used, the result is that the deformation of the product in the process of raising the temperature from room temperature to the firing temperature is the least. Water is the most suitable as the kneading liquid obtained.
  • the sintering temperature must be at least 75 ° C. If it is lower than 750 ° C, the strength of the product will be reduced due to insufficient sintering.
  • the upper limit is not particularly defined, but in applications where porosity is required, the maximum temperature is desirably set to 850 ° C in order to suppress an increase in glassy components. If the temperature is maintained at about 300 ° C. for 30 to 60 minutes before the temperature is raised to more than 700 ° C., the shape collapse during firing is reduced.
  • the firing atmosphere must be a non-oxidizing atmosphere, and if fired in an oxidizing atmosphere, the carbon powder will be burned off by oxidation. For firing in a non-oxidizing atmosphere, an inert gas such as nitrogen may be supplied into the firing furnace.
  • FIG. 1 is a graph showing the radiation spectrum measured for the sample of Example 4.
  • FIG. 2 is a graph showing the far-infrared emissivity measured for the sample of Example 4.
  • fly ash or volcanic ash (or both may be mixed) is mixed with clay, and further a binder resin is added and kneaded with water to obtain the required shape. Formed.
  • the amount of fly ash or volcanic ash is preferably 30 to 70% by weight of the raw material mixture, and the clay is for pottery, for example, 20 to 60% by weight based on the raw material mixture. It is preferable to mix them as follows. If necessary, other auxiliary raw materials such as titanium dioxide, iron oxide or metallic iron, and granulated slag may be blended.
  • the binder resin phenol resin or ketone resin powder is most suitable, and it is preferable to add an appropriate amount of water as a solvent for molding.
  • the amount of the binder resin to be added can be determined by calculating such that the carbon content in the binder-resin remains in the fired product, so that the residual carbon amount is 5 to 20% by weight of the fired product. All target carbon If binder-resin originates from binder-resin and the amount of binder-resin added becomes excessive and causes other inconvenient problems such as kneading or molding, the amount of binder-resin added should be reduced. What is necessary is just to supplement by adding powder.
  • the molded article After the molded article has been sufficiently dried at room temperature (for example, for several days), it is heated in a firing furnace to a temperature of about 300 ° C.
  • a non-oxidizing atmosphere is prepared by blowing nitrogen or argon gas into the furnace.
  • a temperature of 300 ° C for 30 minutes or more, for example, 60 minutes and then, in a non-oxidizing atmosphere, at a temperature of 75 ° C or more, for example, 800 ° C
  • the temperature is raised to, and after maintaining this temperature for 5 to 7 hours, it is allowed to cool naturally to complete firing.
  • composition of the raw materials in each example is as shown in the following table.
  • each raw material is a powder, and water is used as the kneading liquid.
  • the size of the baked product is a block of 2.5 cm X 4 cm X 1.5 cm.
  • the firing temperature was maintained at 300 ° C. for 1 hour and at 800 ° C. for 3 hours, and then allowed to cool naturally.
  • the firing atmosphere was such that nitrogen gas was poured into the firing furnace and firing was performed using a non-oxidizing reducing flame.
  • the emission spectrum and far-infrared emissivity of each calcined product were measured using a Fourier transform infrared spectrophotometer (FTIR) in comparison with a black body. It became clear that a large amount of infrared radiation was emitted.
  • FTIR Fourier transform infrared spectrophotometer
  • the far-infrared emissivity refers to the ratio of the radiation intensity of the sample to the radiation intensity of the black body at the same temperature, and the measurement temperature is 35 ° C.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

La présente invention concerne un procédé de préparation de céramiques à rayonnement infrarouge lointain, caractérisé en ce qu'il consiste d'abord à malaxer et à mouler un mélange de matières premières contenant des cendres volantes ou des cendres volcaniques, de l'argile et une poudre de résine liante, avec le liquide de malaxage pour obtenir la forme voulue, et à cuire ensuite le produit moulé dans une atmosphère non oxydante dont la température est de 750 °C minimum de manière à ce que le produit présente une teneur en carbone comprise entre 5 et 20 % en poids. De préférence, on ajoute la poudre de carbone au mélange de matières premières et on utilise une résine phénolique ou une résine cétonique comme résine liante. De préférence, le produit moulé est maintenu à une température d'environ 300 °C pendant 30 minutes minimum avant de le chauffer à une température de 750 °C minimum. On obtient l'atmosphère non oxydante en injectant par exemple de l'azote dans le four utilisé pour la cuisson précitée.
PCT/JP2000/004119 1999-08-23 2000-06-22 Procede de preparation de ceramiques a rayonnement infrarouge lointain WO2001014278A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU54294/00A AU5429400A (en) 1999-08-23 2000-06-22 Method for preparing far-infrared radiation ceramics

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP23597199A JP3466969B2 (ja) 1999-08-23 1999-08-23 遠赤外線放射セラミックスの製造方法
JP11/235971 1999-08-23

Publications (1)

Publication Number Publication Date
WO2001014278A1 true WO2001014278A1 (fr) 2001-03-01

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PCT/JP2000/004119 WO2001014278A1 (fr) 1999-08-23 2000-06-22 Procede de preparation de ceramiques a rayonnement infrarouge lointain

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JP (1) JP3466969B2 (fr)
AU (1) AU5429400A (fr)
WO (1) WO2001014278A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102344288A (zh) * 2010-07-30 2012-02-08 吴介源 利用瞬间跳温烧结的能量粒料制造方法
ES2378713A1 (es) * 2010-09-17 2012-04-17 José Luis Gómez Padrón Procedimiento para la obtención de productos cerámicos utilizando materia prima de origen volcánico.
CN107140942A (zh) * 2017-07-10 2017-09-08 黑龙江火山岩科技有限公司 火山岩陶瓷用品及其制备方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5221071B2 (ja) * 2007-08-01 2013-06-26 豊和直 株式会社 防燃断熱剤
JP7259170B2 (ja) * 2018-12-10 2023-04-18 英世 藤林 静電気除去装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0201179A2 (fr) * 1985-04-01 1986-11-12 Shandong Province New Materials Institute Poudre céramique noire et articles fabriqués à partir de cette poudre
JPH04305078A (ja) * 1991-04-02 1992-10-28 Sanin Kensetsu Kogyo Kk フライアッシュを主材とした遠赤外線放射体
JPH07330419A (ja) * 1994-06-07 1995-12-19 Nippon Carbon Seiko Kk カーボン入り陶磁器
JPH0852429A (ja) * 1994-08-12 1996-02-27 Meiken Kk 火山灰の精製方法、及び粒体の分級装置
JPH09173478A (ja) * 1995-12-26 1997-07-08 Beam Kogyo Kk 活性イオン発生管

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0201179A2 (fr) * 1985-04-01 1986-11-12 Shandong Province New Materials Institute Poudre céramique noire et articles fabriqués à partir de cette poudre
JPH04305078A (ja) * 1991-04-02 1992-10-28 Sanin Kensetsu Kogyo Kk フライアッシュを主材とした遠赤外線放射体
JPH07330419A (ja) * 1994-06-07 1995-12-19 Nippon Carbon Seiko Kk カーボン入り陶磁器
JPH0852429A (ja) * 1994-08-12 1996-02-27 Meiken Kk 火山灰の精製方法、及び粒体の分級装置
JPH09173478A (ja) * 1995-12-26 1997-07-08 Beam Kogyo Kk 活性イオン発生管

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102344288A (zh) * 2010-07-30 2012-02-08 吴介源 利用瞬间跳温烧结的能量粒料制造方法
CN102344288B (zh) * 2010-07-30 2013-11-06 吴介源 利用瞬间跳温烧结的能量粒料制造方法
ES2378713A1 (es) * 2010-09-17 2012-04-17 José Luis Gómez Padrón Procedimiento para la obtención de productos cerámicos utilizando materia prima de origen volcánico.
CN107140942A (zh) * 2017-07-10 2017-09-08 黑龙江火山岩科技有限公司 火山岩陶瓷用品及其制备方法

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JP3466969B2 (ja) 2003-11-17
JP2003112962A (ja) 2003-04-18
AU5429400A (en) 2001-03-19

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