JPS62113100A - Stable alpha particle radioactive material - 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] [Technical Field of the Invention] The present invention can be used for various purposes such as medical use, health care use, household use, and prevention of pollution such as harmful gases.
Concerning stable alpha particle emitting materials.

[Technical background of the invention]

In the past, radioactive materials were often discarded as worthless. Radioactive materials are sometimes used for medical and health purposes, but in this case too, the amount of radioactivity is always uncertain and unstable, and there is a high risk of contamination due to scattering, so it is difficult to actually use it. However, there are problems in that they are difficult to use and require large-scale equipment.

In addition, air ions have long been attracting attention due to their relationship with the physiological effects of the human body, air pollution, air conditioning, etc. As for their effects on the human body, positive ions in air have stimulatory effects,
Negative ions promote a sedative effect, and negative ions in particular are said to have a positive effect on the physiological functions of the human body. Therefore, various methods have been used to artificially generate negative ions, but most of them use power sources, which are unsafe, unstable, and highly dangerous. In practice, there was a problem in that it was difficult to use easily. Recently, it has also been proposed to use porous materials made by mixing and sintering low-grade radioactive materials with soil as a way to generate negative ions at hand, but these materials are brittle and lack stability. Another problem is that it is not possible to sufficiently supplement the amount of radiation generated from radioactive materials.

[Purpose of the invention]

This invention was made with attention to the above points, and its purpose is to limit the amount of radioactive materials used by completely capturing the alpha particles of radioactive materials and ensuring uniform release. To provide a stable alpha particle emitting substance which can generate a satisfactory amount of air ions, has no risk of contamination or pollution, can be simply and conveniently produced in large quantities, and can be easily produced in large quantities.

[Summary of the invention]

In order to achieve the above object, this invention mixes and fires activated carbon on which radioactive substances have been injected and adsorbed, a combustible foaming agent, metal oxide, and zirconia Zirman to create an extremely porous, safe and unbreakable material. The reason lies in the formation of alpha particle emitting substances as ceramic chemical products.

The stable alpha particle emitting material according to this invention stably and homogeneously contains radioactive materials, and since the alpha particles emitted from it have a strong property of penetrating materials, it is difficult to create materials along that path. It has the effect of imparting energy to atoms and molecules in the atmosphere, ionizing and ionizing the substances, and at the same time has the effect of generating radon dilute active gas. Therefore, the substance according to the present invention can be used, for example, in medical treatment equipment, radon generating equipment, negative ion generating equipment, etc., as well as as a spawning promoter, a growth agent for fish, etc., a pollution control agent for air pollution, and a liquid fuel activator. It can also be used in home life as bedding, indoor air purifiers, etc.

Next, the alpha particle emitting material of the present invention will be explained.

First, the radioactive substances used in this invention may be any of the uranium-based "2Rn", thorium-based "0Rn, actinium-based" 9Rn, etc., which release alpha particles upon decay, as long as they are within the scope of legal regulations. However, thorium-based "'Rn" is particularly preferred because it is stable and has no side effects. Natural minerals containing radioactive substances are themselves radioactive substances according to the present invention, but since these minerals contain various impurities, for example, 25% sulfuric acid is added and heated at around 80°C to 100°C. It is desirable to remove impurities in a pretreatment process, such as by eluting them. The radioactive substance is in the form of fine particles, preferably 300 mesh,
The particle size used is about 46 microns (U).

The radioactive substance is adsorbed onto activated carbon. This adsorption ranges from a few angstroms (Ao) to several hundred angstroms (Ao).
This can be carried out by stirring and mixing activated carbon particles having a large number of pores with a diameter of A') and a finely divided radioactive material in a powder mixer while introducing pressure air.

As radioactive substances, monacide etc. Al, 03, Sj
When an ore containing a large amount of O□ is used, the radioactive substance is injected into the pores of the activated carbon and adsorbed, even without the use of a glue or the like, because it has high affinity and adsorption properties.

The flammable foaming agent is used as an auxiliary agent to promote the porosity of the material of the present invention, and can be any fine powder that can be completely combusted during firing to achieve the purpose of the auxiliary agent. In particular, fine powder of buckwheat husks, fine wood shavings, fine powder of rice husk, etc. with a particle size of about 200 mesh and a particle size of 74 microns (U) are suitable.

Zirconia-based zircon shifts to a moderate composition due to its physical changes, but as a chemical component ZrO
A material containing 60% or more of □ and 30% or more of SiO□ is desirable. This zirconia-based zircon can withstand high temperatures during firing and is useful for increasing the hardness of ceramics.
The substance of the present invention is used as a far-infrared radiator, and its range of uses for treatment and health purposes is expanded. In addition, as metal oxides, oxides such as Fe, Co, Ni, Cr, and Mn can generally be used, but in particular, Fe2O3, Mn20, etc.
．． etc. are suitable. The addition of metal oxides increases the hardness of the material of the invention and gives it a blackish-brown or greyish-brown luster. There are a wide variety of types of base soil, and although it is not particularly limited, selecting wood knot mucilage containing organic matter and agile iron oxide and manganese oxide is effective in increasing the hardness of the resulting ceramics.

To obtain the alpha particle emitting material of this invention, first, a mixture of activated carbon particles adsorbed with radioactive materials and a combustible foaming agent is mixed on a substrate to which an appropriate amount of water has been added, and then a metal oxide and a zirconia-based zircon are mixed. Add and knead. In this case, if pressurized air is introduced during kneading to increase the degree of dispersion and entrain air bubbles, the porosity of the ceramic obtained after firing is promoted. By repeating such kneading, a flexible solid can be obtained. Next, the above-mentioned solid material is formed into a desired shape and dried, and then fired in accordance with a conventional method for firing ceramics, the foaming agent is burned and a hard porous ceramic that can withstand external pressure is formed. A stable alpha particle emitting material is obtained.

The alpha particle radioactive material of this invention contains radioactive material and air in activated carbon and has a combustion space for the foaming agent, so the alpha particles emitted from the radioactive material can be efficiently and easily ejected and follow their path. Along these lines, energy can be given to the atoms and molecules that make up the material, ionizing the material and releasing radon rare active gas. Moreover, since this alpha particle emitting material is a solid radioactive material whose emission amount of alpha particles is almost constant, the emission amount of alpha particles is stable.
It is highly safe and does not cause any side effects. Therefore, the alpha particle emitting substance of this invention can be used for the following purposes.

First, for therapeutic purposes, air is passed through the material of this invention.
By inhaling the generated radon dilute active gas or introducing it into a bathtub, it can be easily applied and used to treat autonomic nervous disorder and other various diseases. Also, when the substance of this invention is added to or ignited in a liquid fuel.

The action of the emitted alpha particles excites the atoms or molecules that make up the liquid fuel, causing physical or chemical changes in the fuel and activating the liquid fuel, while at the same time reducing nitrogen oxides during combustion. It can also reduce the amount of carbon monoxide generated. Moreover, when the substance of the present invention is added to liquid fuel, it is possible to stably emulsify 40% of water in the liquid fuel based on the total amount of liquid fuel and water. The thermal efficiency of the emulsified fuel is
Compared to liquid fuel that does not mix with water, it has the characteristic that it is almost the same.

In addition, the substance of this invention moderately negatively ionizes air through the ionization effect of alpha particles generated.
Because it can calm down nerve cells, it can be used for indoor air purification, as an indoor purifier, for bedding, as a sleep stabilizer, and has an extremely wide range of uses in home life.

The reason for this is that the material of the present invention is porous and stably contains radioactive substances, and slowly generates and releases alpha particles in a constant amount at a time. It is absolutely impossible to always measure the effects described above from the state of emission.

〔Example〕

Radioactive mineral fine powder 1 containing 5un265%, AI□0325% or more and radioactive substance ThO□ 1 to 5%
0 kg and active 117 kg are stirred and mixed in a powder mixer for about 2 hours while introducing pressurized air, and the fine powder of the radioactive mineral is injected into the pores of the activated carbon and adsorbed. Next, 3 kg of fine wood chips were added as a foaming agent and mixed well, and 70 kg of the base material to which an appropriate amount of water had been added was added and kneaded thoroughly.

Furthermore, 65 kg of zircon containing 65% ZrO□, 30% or more of 810□, and 20330 kg of Fe on the base soil 30-
, 2032 kg of Mn mixed with appropriate water are added, and the mixture is kneaded several times in a clay kneader to which pressurized air can be introduced, in order to entrain air bubbles and increase the degree of dispersion. By repeating the kneading process in this way, a flexible solid product is obtained.The resulting flexible solid product is formed into a desired shape and dried.After this, this is processed using the usual method for firing ceramics. By firing at 1250'C to 1350C according to the method, an alpha particle radioactive material made of hard, solid, porous ceramics that stably contains a radioactive substance and can sufficiently withstand external pressure can be obtained.

- The alpha particle emitting material obtained as described above is designated as A, and the ceramic chemical product consisting of the same components as A except that it does not contain activated carbon and wood chips is designated as B. I measured the amount of negative ions generated. The results of the deposit were as follows.

■Amount of alpha particles released (measured with an alpha beam meter) A 50,000 cpm B Old, 500 cpm ■Amount of negative ions generated (measured with a boundary wall air ion counter) A 15,500 pieces B 12,400 pieces or more In both cases, 1-kg each of A and R was combined at 71% and 5%.
This is the average value measured twice.

According to the above results, alpha particle emitting material A of Example
It turns out that, compared to substance B, the amount of alpha particles released and the amount of negative ions generated are larger.

〔effect〕

As explained above, the alpha particle emitting material of the present invention contains activated carbon that has radioactive material adsorbed inside, so the alpha particles emitted from it will travel along its path to the atoms that make up the material. It can impart energy to molecules, dissociate and ionize the substance, and can also generate radon dilute active gas. In that case, since the alpha particle emitting material of this invention is made of highly porous ceramics that have a combustion space for air, activated carbon, and a foaming agent, alpha particles can be efficiently and easily emitted even if the amount of radioactive material is limited. radiated.

Furthermore, in the alpha particle emitting material of the present invention, the amount of radioactive material whose alpha particle emission amount is approximately constant can be appropriately selected and used, so the alpha particle emission amount is always stable and safety is maintained. It is excellent and does not cause any side effects. In addition, since this alpha particle emitting material is made of hard ceramic, there is no risk of breakage, it can be used with water, etc., it is convenient to handle, and the production cost is low and does not require electricity etc. It has the effect of being able to be used semi-permanently.

Claims (1)

[Claims] A stable alpha particle radioactive material characterized by being made of porous ceramics made by firing a mixture of base soil, activated carbon adsorbing radioactive materials, a combustible foaming agent, metal oxides, and zirconia-based zircon.