WO2007024062A1

WO2007024062A1 - Multifunctional ceramic compounds

Info

Publication number: WO2007024062A1
Application number: PCT/KR2006/002755
Authority: WO
Inventors: Su-Hwan Kim
Original assignee: SHIN-A AT Co Ltd
Current assignee: SHIN-A AT Co Ltd
Priority date: 2005-08-25
Filing date: 2006-07-13
Publication date: 2007-03-01
Anticipated expiration: 2008-02-25

Abstract

Disclosed is a multifunctional ceramic composition. More specifically disclosed is a multifunctional ceramic composition which shows various advantageous functions such as de- odorization, antibacterial effect, activation of water by reduction, emission of far-infrared ray, hydrophilicity and the like, and comprises 50-60 wt % of SiO2, 13∼16 wt % of Na2O, 1.4∼1.7 wt % of B2O3, 0.3∼0.5 wt % of Li2O, 4∼6 wt % of CaO, 1.7∼2.2 wt % of Al2O3, 0.005∼0.01 wt % of P2O5, 0.5∼1 wt % of TiO2, 0.5∼1 wt % of ZnO, 0.02∼0.04 wt % of K2O, 5∼6 wt % of Fe2O3, 12∼15 wt % of MgO and 0.05∼0.1 wt % of MnO. The multifunctional ceramic composition has significantly high efficiency of removing ammonia smell, an excellent disinfection effect on E. coli and Pseudomonas aeruginosa, good activation of water by reduction, and a remarkably high far- infrared irradiation effect as compared to normal glass compositions. Further, products obtained according to the preset invention have a high degree of hydrophilicity, which allows them to be utilized in various products with excellent functions. The multifunctional ceramic composition according to the present invention also emits abundant amount of anions, raising combustion efficiency.

Description

MULTIFUNCTIONAL CERAMIC COMPOUNDS

Technical Field

[1] The present invention relates to a multifunctional ceramic composition, specifically to a multifunctional ceramic composition which shows various advantageous functions such as deodorization, antibacterial effect, activation of water by reduction, emission of far-infrared ray, hydrophilicity and the like, and comprises 50-60 wt% of SiO , 13-16 wt% of Na O, 1.4-1.7 wt% of B O , 0.3-0.5 wt% of Li O, 4-6 wt% of CaO, 1.7-2.2 wt% of Al 2 O 3 , 0.005-0.01 wt% of P 2 O 5 , 0.5-1 wt% of TiO 2 , 0.5-1 wt% of

ZnO, 0.02-0.04 wt% of K 2 O, 5-6 wt% of Fe 2 O 3 , 12-15 wt% of MgO and 0.05-0.1 wt% of MnO. Background Art

[2] The term, ceramic, covers inorganic non-metallic solid materials of which formation is due to the action of heat at high temperature. Ceramic generally has excellent fire resistance, which allows the wide range of use thereof in diverse products in various fields including household products, construction material and even up- to-date high technology products.

[3] Such ceramic composition widely used as a raw material in diverse products has been variously investigated to develop a ceramic composition having multifunc- tionality. However, when forming a ceramic material and firing the formed ceramic, it results in formation of pores in the formed ceramic, i.e. a porous ceramic. Such porous ceramic has problem that the pores could be provided as a place for living to suspended materials and bacteria, and such bacteria settled therein, as time elapses, would develop resistance, then finally being a habitat of microorganisms. Further, as the fired powders are rubbed off from such ceramic, there has been a risk of elution of toxic components. Under these circumstances, a composition which can achieve multiple effects such as deodorization, far-infrared emission, water activation through reduction, hydrophilicity and anion emission at the same time has not yet been provided.

[4] Although a photocatalytic coating process was suggested to improve functions including deodorization, disinfection and hydrophilicity, its practical use was failed owing to the high cost required to the process, since it involves the use of expensive titanium dioxide as a photocatalyst. Disclosure of Invention Technical Problem

[5] The present invention has been designed to solve the above-mentioned problems of the prior arts, and thus the object of the present invention is to provide a multifunctional ceramic composition which can exhibit various effects at the same time such as deodorization of ammonia, disinfection of contaminants, far-infrared emission, water activation through a reductive process, hydrophilicity, anion emission, prevention of bacteria and their growth in the pores by using a melting process at a certain temperature, removal of the risk of the elution of impurities or toxic materials and the like. Technical Solution

[6] In order to solve the above-described technical problems of prior arts, a multifunctional ceramic composition according to the present invention is composed of 50-60 wt% of SiO 2 , 13-16 wt% of Na 2 O, 1.4-1.7 wt% of B 2 O 3 , 0.3-0.5 wt% of Li 2 O,

4-6 wt% of CaO, 1.7-2.2 wt% of Al 2 O 3 , 0.005-0.01 wt% of P 2 O 5 , 0.5-1 wt% of TiO 2 ,

0.5-1 wt% of ZnO, 0.02-0.04 wt% of K 2 O, 5-6 wt% of Fe 2 O 3 , 12-15 wt% of MgO and 0.05-0.1 wt% of MnO.

[7] Further, a multifunctional ceramic composition according to another embodiment of the present invention characteristically comprises 60-70 wt% of SiO , 15-20 wt% of Na O, 1.0-1.5 wt% of B O , 0.3-0.5 wt% of Li O, 4-6 wt% of CaO, 5.0-6.0 wt% of Al 2 O 3 , 0.01-0.05 wt% of P 2 O 5 , 0.8-1.2 wt% of TiO 2 , 0.5-1 wt% of ZnO, 0.1-0.2 wt% of K O, 0.5-1.0 wt% of Fe O , 0.5-1.0 wt% of MgO, 0.01-0.02 wt% of MnO and 0.01-0.02 wt% of Cr O .

2 3

[8] Preferably, based on 100 parts by weight of the multifunctional ceramic composition, 5-25 parts by weight of ilmenite and/or 1-15 parts by weight of monazite are further added thereto.

[9] The multifunctional ceramic composition is preferably prepared by using a semisolid forming or melting process at 1200-1500 ⁰C, and desirably has a thermal expansion coefficient in around the range of 95x10 -110x10 .

[10] Ilmenite has a molecular formula of FeTiO , and shows antibacterial, deodorizing and antifungal functions. Monazite of which elemental composition is (Ce, La, Y, Th)PO 4 , is a phosphate mineral containing rare earth metals from cerium group, and has antibacterial, anion emitting functions and the like.

[11] In the meantime, far-infrared ray has a strong heat effect, owing to the fact that the frequency of the far-infrared is nearly in the same range of the natural frequency of molecules which constitute a material. When far-infrared hits a material, electromagnetic resonance is occurred and thus the energy from far-infrared ray is effectively absorbed to the material, resulting in the heat effect.

[12] Such far-infrared also has many effects on human body. Several representative effects among them, include temperature elevation in hypodermic area, expansion of capillary blood vessel, promotion of blood circulation, strengthening of metabolism in blood, body and organs, eradication of blood disorder, and improvement in tissue regeneration capacity or anticonvulsion effect, and further include inhibition on unusual excitation of sensory nerves and control of the autonomic nerves functions.

[13] Tap water should be sterilized for the use as drinking water, therefore, for this purpose, chlorine is generally added to tap water, which causes a decrease in the reductive potential of water resulting in oxidation of water. Such oxidized water can be hazardous to the human body and therefore, currently various water reducing devices have been suggested as a method for activating water through a reductive process.

[14] Such reduced water is very beneficial to the human body, and has advantageous effects such that it has; a great effect on disorders in abdominal area including diarrhea or constipation; a prophylactic or therapeutic effect on gastric mucous disorders such as a gastric ulcer; an effect of inhibiting fat accumulation in the body; reducing the blood cholesterol level; and a therapeutic effect on heart diseases, or the like.

[15] Additionally, anion is widely known to have functions of air cleaning and disinfection of dust and bacteria, and further effects on human body such as blood purification, cell activation, increase in resistant power, alleviation of pains, adjustment of autonomic nerve system and the like.

Advantageous Effects

[16] The multifunctional ceramic composition of the present invention has a significantly high deodorizing effect, an excellent disinfection effect on E.coli and Pseudomonas aeruginosa, an excellent water activation effect by reduction, and increased far-infrared emission as compared to general glass composition. Further, the product according to the present invention has remarkable hydrophilicity, thus also being able to exert excellent functions when being formed as various products.

[17] The multifunctional ceramic composition according to the present invention emits great amount of anions, causing another remarkable effect of raising combustion efficiency.

[18] In the meantime, by preparing a multifunctional ceramic composition according to the present invention through a semi-solid forming or melting process at 1200~1500 ⁰C, other functional effects of the present invention can be obtained further such as prevention of bacteria and their growth in the pores present in conventional ceramic, and removal of the risk of the elution of impurities or toxic materials and the like. Brief Description of the Drawings

[19] Fig. 1 is a plot showing the state before and after the use of a multifunctional ceramic composition according to the present invention, and

[20] Fig. 2 is a plot showing the state before and after one month of use of a multi- functional ceramic composition according to the present invention. Best Mode for Carrying Out the Invention

[21] Hereinafter, the present invention and its effects are further described in detail through the illustrative examples of multifunctional ceramic composition according to the present invention.

[22] *Determining a composition to be tested* [23] Before carrying out various tests according to the present invention, a composition to be subjected to the tests was determined, which comprises the components as below.

[24] SiO 2 56.361 wt% Na 2 O 14.531 wt% [25] B 2 O 3 1.669 wt% Li 2 O 0.471 wt% [26] CaO 4.574 wt% Al O 1.908 wt% [27] P 2O 50.008 wt% TiO 20.841 wt% [28] ZnO 0.791 wt% K 2 O 0.039 wt% [29] Fe 2 O 3 5.174 wt% Mg ^&O 13.563 wt% [30] MnO 0.07 wt% [31] (Hereinafter, the composition is referred as "Blank 1"). [32] [Example 1] [33] Table 1

[34] * The tested composition Blank 1 absents a composition according to the present invention)

[35] Test: XFIA-FI- 1004 [36] Gas used in the test: ammonia [37] Determination of gas concentration: gas detecting tube [38] [39] As seen from the above example 1, when 30 minutes elapsed from the start of the test, it is found that the ammonia concentration in Blank 1 where a composition of the present invention was not added, was not so much different from that of the initial state, however in the composition according to the present invention, the deodorization rate was as high as 87%. Further, it is found that the deodorization rate of the composition according to the present invention was even increased as time elapsed, reaching to 94% in 120 minutes after the start of the test.

[40] [Example 2] [41] Table 2

[42] Note: The tested composition Blank 1 absents a composition according to the present invention. The number of bacteria on the culture medium was estimated by multiplying dilution factor.

[43] Test: KFIA-FI- 1003 [44] Bacteria strains used in the test: Escherichia coli ATCC 25922 [45] Pseudomonas aeruginosa ATCC 15442 [46] [47] As seen from the above example, after 24 hours elapsed from the start of the test, it can be recognized that the initial concentration of E.coli in Blank 1, where a composition of the present invention was not added, was hardly changed, however in the composition according to the present invention, the disinfection rate was very high, reaching to 98%. Regarding Pseudomonas aeruginosa, the composition according to the present invention showed 98.2% of disinfection rate.

[48] [Example 3] [49] Table 3

[50] The test results were obtained by using FT-IR spectrometer and comparing with a black body.

[51] [52] As it can be seen from Example 3, the multifunctional ceramic composition according to the present invention showed very high emission efficiency as compared to the conventional general soda lime glass composition having 0.6-0.7D of the emission efficiency, accordingly the emission energy was also found to be very high.

[53] [Example 4]

[54] Fig. 1 is a plot showing the state before and after the use of a multifunctional ceramic composition according to the present invention, and Fig. 2 is a plot showing the state before and after one month of use of a multifunctional ceramic composition according to the present invention.

[55] In Figs. 1 and 2, the "RunFile- 003. drt" shows the state which did not use the multifunctional ceramic composition according to the present invention, and the "RunFile_004.drt" shows the state right after the use of the multifunctional ceramic composition according to the present invention. Further, "RunFile_007.drt" shows the state in one month after the use of the multifunctional ceramic composition according to the present invention

[56] Test method: The multifunctional ceramic composition according to the present invention was placed in a supplementary tank for cooling water used in a car, and a change in the value of Max Torque(kg-M) was observed.

[57] As it can be seen from the drawings, after placing the multifunctional ceramic composition according to the present invention, the Max Torque value was changed from 13.95 to 14.22, and especially, after one month, it was further increased significantly to 14.97.

[58] In the above, the Max Torque value refers to the engine power. After placing the multifunctional ceramic composition according to the present invention, it can be recognized that the fuel economy was largely improved.

[59] It is because the multifunctional ceramic composition of the present invention emits great amount of anions, which increases the combustion efficiency. When placing a composition of the present invention in a cooling water tank of a car, the cooling water in the supplementary tank becomes modified to activated water which has less number of agglomerated water molecules owing to the large emission of far-infrared, and the anions which are one of intrinsic characteristic features of the ceramic composition of the present invention are emitted into the activated water. As the car engine is powered, the temperature of the cooling water for a radiator becomes elevated along the temperature increase in the engine, and then the cooling water for a radiator starts to circulate with the cooling water in the supplementary tank, finally bringing the whole cooling water into activated water. Then, as the activated cooling water moves around the cylinders of the car engine, an electromagnetic field is naturally formed, due to the great amount of anions. Accordingly, the combustion rate of the cylinders is increased, which makes possible to perform an oxidative reaction achieving nearly the complete combustion. Therefore, ultimately, it is possible to reduce fuel consumption of a car and noises generated from the rotation of an engine, to improve the engine power and to extend the life of engine oil, too (excitation theory). Additionally, it also exhibits dramatic improvement in the composition of an exhaust gas regarding CO and HC content.

[60] Further, the contact angle of the multifunctional ceramic composition product according to the present invention was determined by a water dropping method, resulting in the contact angle of about 3° which means weak surface tension and excellent hydrophilicity.

[61] With another composition according to another embodiment of the present invention, following tests were carried out.

[62] *Determining a composition to be tested* [63] Before carrying out various tests according to the present invention, a composition to be subjected to the tests was determined, which comprises the components as below.

[64] SiO 265.607 wt% Na 2 O 18.970 wt% [65] B 2O 3 1.271 wt% Li 2 O 0.440 wt% [66] CaO 4.150 wt% Al 2 O 3 5.718 wt% [67] P 2O 5 0.030 wt% TiO 2 1.044 wt% [68] ZnO 0.953 wt% K 2 O 0.184 wt% [69] Fe₂O₃ 0.903 wt% MgO 0.700 wt% [70] MnO 0.015 wt% Cr 2 O 3 0.014 wt% [71] (Hereinafter, the composition is referred as "Blank 2") [72] [Exmaple 5] [73] Table 4

[74] * The tested composition Blank 2 absents a composition according to the present invention)

[75] Test: XFIA-FI- 1004 [76] Gas used in the test: ammonia [77] Determination of gas concentration: gas detecting tube [79] As seen from the above example 5, when 30 minutes elapsed from the start of the test, it is found that the ammonia concentration in Blank 2 where a composition of the present invention was not added, was not so much different from that of the initial state, however in the composition according to the present invention, the deodorization rate was as high as 86%. Further, it is found that the deodorization rate of the composition according to the present invention was even increased as time elapsed, reaching to 94% in 120 minutes after the start of the test.

[80] [Example 6] [81] Table 5

[82] Note: The tested composition Blank 2 absents a composition according to the present invention. The number of bacteria on the culture medium was estimated by multiplying dilution factor.

[83] Test: KFIA-FI- 1003 [84] Bacteria strains used in the test: Escherichia coli ATCC 25922 [85] Pseudomonas aeruginosa ATCC 15442 [86] [87] As seen from the above example, after 24 hours elapsed from the start of the test, it can be recognized that the initial concentration of E.coli in Blank 2, where a composition of the present invention was not added, was hardly changed, however in the composition according to the present invention, the disinfection rate was very high, reaching to 98.5%. Regarding Pseudomonas aeruginosa, the composition according to the present invention showed 97.2% of disinfection rate.

[88] [Example 7] [89] Table 6

[90] The test results were obtained by using FT-IR spectrometer and comparing with a black body.

[91]

[92] As it can be seen from Example 7, the multifunctional ceramic composition according to the present invention showed very high emission efficiency as compared to the conventional general soda lime glass composition having 0.6-0.7D of the emission efficiency, accordingly emission energy of the present invention was also very high.

[93] Although a specific preferred embodiment of the present invention has been illustrated and described, the present invention is not limited only to the above-described preferred embodiment. Furthermore, those skilled in the art will appreciate that various modifications are possible without departing from the gist of the technical spirit of the present invention, which is described in the claims below.

Claims

[1] A multifunctional ceramic composition comprising 50-60 wt% of SiO , 13-16 wt% Of Na₂O, 1.4-1.7 wt% Of B₂O₃, 0.3-0.5 wt% of Li₂O, 4-6 wt% of CaO, 1.7-2.

2 wt% of Al 2 O 3 , 0.005-0.01 wt% of P 2 O 5 , 0.5-1 wt% of TiO 2 , 0.5-1 wt% of ZnO, 0.02-0.04 wt% of K₂O, 5-6 wt% Of Fe₂O₃, 12-15 wt% of MgO and 0.05-0.1 wt% of MnO.

[2] A multifunctional ceramic composition comprising 60-70 wt% of SiO , 15-20 wt% of Na 2 O, 1.0-1.5 wt% of B 2 O 3 , 0.

3-0.5 wt% of Li 2 O,

4-6 wt% of CaO,

5.0-6.0 wt% ofAl 2O 3, 0.01-0.05 wt% ofP 2O 5, 0.8-1.2 wt% ofTiO 2, 0.5-1 wt% of ZnO, 0.1-0.2 wt% of K 2 O, 0.5-1.0 wt% of Fe 2 O 3 , 0.5-1.0 wt% of MgO,

0.01-0.02 wt% of MnO and 0.01-0.02 wt% of Cr 2 O 3.

[3] The multifunctional ceramic composition according to claim 1 or 2, further comprising 5-25 parts by weight of ilmenite and/or 1-15 parts by weight of monazite, based on 100 parts by weight of the multifunctional ceramic composition of claim 1 or 2

[4] The multifunctional ceramic composition according to claim 3, which is produced by using a semi-solid forming or melting process at 1200-1500 ⁰C.

[5] The multifunctional ceramic composition according to claim 4, which has a thermal expansion coefficient in around the range of 95x10 -110x10 .