JPS61286262A - Ceramic sintered body - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) This invention applies to far-infrared rays of effective wavelength 1f! A't--Relates to a sintered silicate ceramic that emits heat with an extremely high and stable emissivity.

(Prior Art) Infrared rays are roughly divided into near infrared rays with wavelengths of 0.78 to 4.0 microns and far infrared rays with wavelengths of 4.0 to 4.0 microns.

Among these, near-infrared rays are conventionally used as the heating wavelength of so-called infrared heaters and heaters called infrared lamps, but this near-infrared rays heating only affects the surface of the skin, as it destabilizes human emotions. Although they have drawbacks such as not being able to heat up or causing low-temperature burns, electric stoves that heat nichrome wire in quartz glass tubes, reflective crack gas, kerosene stoves, and infrared therapy devices also use near-infrared rays. It was mainly used.

On the other hand, far infrared rays are invisible heat rays that have a positive effect on the human body, and it has recently been reported that far infrared rays with a wavelength of about 8 to 14 microns have a particularly good effect on the human body.

According to this, far infrared rays of the above-mentioned wavelength are below the skin from 40 to
Penetrates up to 50mm, resonates human cells, and warms the human body from the core, thereby dilating microvessels, activating blood circulation, strengthening metabolism, clearing body fluid disorders, increasing tissue regeneration power, and promoting growth. I believe it is effective.

(Problems to be Solved by the Invention) Alumina ceramic sintered bodies, zirconium ceramic sintered bodies, etc. are known as far-infrared radiators with wavelengths of about 8 to 14 microns. Regarding the solids, there are also drawbacks such as the fact that it is not possible to obtain a material with a sufficiently high far-infrared emissivity at the above-mentioned wavelengths, and it is difficult to obtain inexpensive raw materials.

(9) Conventionally known sintered silicic acid ceramics have low far-infrared emissivity at wavelengths of 8 to 14 microns, and also have variations, and cannot be put to practical use.

Therefore, the present invention provides a ceramic sintered body that is mainly made of silicic acid that can be obtained at low cost, and that exhibits extremely high and stable far-infrared emissivity in the far-infrared region of the above-mentioned 8 to 14 micron wavelength. The purpose is to

(Means for Solving the Problems) In order to solve the above problems, in this invention, 5jOz
(73±4) Wt%, A120B (15±a) wt
%, Fa2's (5±4) Wt%, Li2O, (S±
2) On the surface of the base material containing wt%, the balance being MgO and CaOf,
5ioz (70±4) Wtchi, At20. (15
±4) Wt '1, Fe2O2(S±4)Wt
%, Ls20 (5±2) wt%, Coos (5±o
, s)wt%, the remainder being coated with a coating material containing kO1Cα0.8#0, and sintered at a relatively low temperature of 1250° C. or lower.

Here, MQO1Cα0 added as the remaining component of the base material is added at a ratio of (2±o, s) wt, (2±o, s) wt, and 20% is added as the remaining component of the upper drug.
CaO18aO is added at a rate of, for example, (1±o, s) wt%, (1±o, s) wt%, (2±o, s) wt%.

The above base material components are finely pulverized, then water is added and mixed to form a certain shape, and a top coat consisting of the above components is applied thereon, and then heated at a relatively low temperature of 1250°C or less, for example, 1250°C. Baking is carried out at a temperature range of -115°C for 12 hours or more, for example 12 to 14 hours.

Further, specifically, reduction firing is performed while a small amount of air is pumped into the entire furnace, and the temperature inside the furnace is gradually raised to the above-mentioned temperature range, and reduction firing is performed for a predetermined period of time.

(Effects of the Invention) The ceramic sintered body obtained as described above is mainly composed of silicic acid components which are inexpensive and easily available, and has a wavelength of 8 to 14 microns, which is said to have excellent effects on the human body. It exhibits extremely high and stable far-infrared emissivity in the far-infrared region. This radiation is sufficiently performed even at a relatively low temperature of about body temperature.

Therefore, the ceramic sintered body 1 according to the present invention! - It can be formed into a flat shape and attached to the affected area using medical paper tape, etc., or it can be stored in a belly band, underwear, socks, supporter hat, life jacket, etc., and then it can be layered and crimped onto the body, affected areas, and pressure points. If you do this, you will get medical effects such as promoting blood circulation, relieving stiff shoulders, muscle pain, neuralgia, and fatigue. Moreover, if it is attached to the inside of a futon, etc., in addition to the above-mentioned medical effects, a sufficient sleep effect can be obtained.

In addition, in order to increase the radiation efficiency of far infrared rays, it is preferable to make the surface of the ceramic sintered body rough, and if a plurality of protrusions are provided on the surface of the ceramic sintered body and it is pressed against the body, The above-mentioned medical effect is further promoted by adding the pressure stimulation effect by the external protrusion to the far-infrared radiation effect by the above-mentioned ceramic sintered body.

Furthermore, the ceramic sintered body according to the present invention is capable of producing far-infrared rays in the wavelength range of 8 to 14 microns at a relatively low temperature of about body temperature.
However, if a heat source such as a heater is added to this, a thermal effect will be added in addition to the far-infrared radiation effect, and the above-mentioned medical effects will be further promoted.

Note that the ceramic sintered body according to the present invention is not only used for medical purposes, but can be several times more effective in cultivation if it is scattered on the ground surface of cultivated plants, for example. Furthermore, if the ceramic sintered body according to the present invention is used as a heater, it is possible to heat the room with far infrared rays in a wavelength range suitable for the human body. Due to the action of far infrared rays of 8 to 14 microns, drying, food cooking, and processing effects that cannot be seen when using conventional equipment can be achieved.

On the other hand, in addition to the far-infrared radiation effect, the ceramic sintered body according to the present invention has an excellent ability to separate components in a mixed gas, such as paraffin olefin components and aromatic components from gasoline. Therefore, it can also be used as a filter for gas chromatographs and the like.

It should be noted that the effects of the ceramic sintered body of the present invention as described above cannot be explained only by far-infrared radiation, component separation, etc., and in this regard, the inventors of the present application have explained that the ceramic sintered body of the present invention Kay! ! 11, but it is presumed that the fact that it contains alkaline components such as LsxO*'aOlMgOl, etc. and exhibits weak alkalinity as a whole has an important influence on the effectiveness of the ceramic sintered body of the present invention. ing.

(Example) Examples of this invention will be shown below.

Example 1 StO276wt%%u20315wt%, Fe2O
25wt%, Lj203wt%, MgO2wt%, Cα
A base material made of 02Wt was formed into a flat shape, and then 5i
0270 wt%, At20515 Wt, Fe2O
25wt%, L (20g S wt%, Coos 5
wt%, K2O1Wt elb, CaOI wt%,
Apply a medicine consisting of 8g02Wlchi on this and 12
It was baked at a temperature range of 00 to 1250°C for 12 to 14 hours.

The drawing shows the thermal radiation intensity of the ceramic sintered body of the present invention obtained as described above and the conventional silicate ceramic sintered body containing 70 inch 5 (02k), which is compared to the conventionally known ceramic sintered body. The sintered silicic acid ceramic body is 8.
In the far infrared region of wavelengths from 0 to 14 microns, the emissivity of far infrared rays is low and varies. In contrast, the ceramic sintered body of the present invention exhibits an emissivity of nearly 100% in the wavelength range of 8.0 to 14 microns, and is extremely stable.

Example 2 The ceramic sintered bar obtained in Example 1 was crushed and packed into a column of a gas chromatograph.

When gasoline was passed through the reactor at a rate of 65 g/min using nitrogen gas as a carrier, 10 types of paraffin olefin components and 7 types of aromatic components could be separated.

[Brief explanation of drawings]

The drawing is a diagram showing the relationship between the emitted infrared wavelength and the emissivity of the ceramic sintered body according to the present invention and the conventional silicate ceramic sintered body.

Claims (1)

[Claims] SiO_2(73±4) Wt%, Al_2O_3(1
5±4) Wt%, Fe_2O_3(5±4) Wt%, L
SiO_2 (70±4) Wt%, Al_
2O_3(15±4) Wt%, Fe_2O_3(5±4
) Wt%, Li_2O(3±2) Wt%, CoO_3(
3±0.5) Wt%, the balance is K_2O, CaO, SeO
1. A ceramic sintered body, characterized in that it is coated with a glaze containing a varnish and fired at a relatively low temperature of 1250°C or lower.