JPH01120877A - Buffer material - Google Patents

Abstract

PURPOSE:To easily apply a buffer material to the case of a large size, a large area and a continuous length and to improve universality without limiting with the shape and the area of an installation surface by composing the material employed to prevent various units from colliding with an equipment or to alleviate its impact of a superconducting oxide. CONSTITUTION:A superconductor is employed as a material of expecting to prevent a collision and alleviate its impact due to a magnetic repelling force. That is, complete diamagnetism or Meissner effect exhibited in case that the superconducting material is at a critical temperature (Tc) or lower is applied. Accordingly, when the superconductor is disposed at one side, a pole disposed oppositely thereto may be any of N- and S-poles, which are not strictly necessarily disposed oppositely, but a magnetic force of arbitrary direction may be sufficient. Then, a magnet or a solenoid 2 is so provided at the end of a moving body as to face oppositely to a buffer material 1. Thus, the cost of increasing its size, area and length can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a cushioning material used for collision prevention or shock mitigation of various devices and equipment.

[Prior Art] Conventionally, for the purpose of alleviating impact, either the N or S poles of magnets are opposed to each other, and the magnetic repulsion at close distances has the effect of preventing collisions or softening the impact. In this method, there is a limit to the strength of the magnetic force, strong magnets are expensive, and for large, large-area, long objects or equipment parts, it is not only expensive, but also due to the production of the magnet and the magnetic force. There were problems such as harm caused by interference with other parts.

[Objective] An object of the present invention is to solve the above-mentioned problems of the prior art and to provide a high-performance cushioning material for collision prevention and impact mitigation.

[Structure] The structure of the present invention for achieving the above object is a buffer material made of superconducting oxide.

That is, the present invention basically uses a superconductor as a material in hopes of preventing collisions and mitigating shocks through magnetic repulsion. In other words, the superconducting material reaches the critical temperature (T
c) It applies perfect diamagnetism or the Meissner effect shown at the following temperatures. Therefore, the advantages of using this material compared to conventional materials are: 1) When the superconductor is on one side, the magnetic pole (hereinafter referred to as the counter pole) for this can be either the N pole or the S pole. Also good. Furthermore, it is not necessary to strictly oppose N or S, and magnetic force in any direction is sufficient. As shown in FIG. 1, a magnet or a solenoid 2 may be provided at the tip of the moving body so as to face the buffer material 1.

2) Of course, an energized solenoid can be used as the source of the magnetic force of the opposite pole.

3) With the configuration l) above, large size, large area, and long length can be realized at low cost.

By the way, the composition of the superconducting oxide mentioned above is R,
Compounds consisting of SZ, D, A (R, X5ZSD,
A) = R, X-Z, Da A.

A superconducting buffer material, where R is Sc, YSLa, and a lanthanum group element, and X is Ba.
, Sr, Ca, etc., Z is a transition metal element such as Cu, D is a group II chalcogen element such as 0, A is an element of B, C, N, and F, each of which is an element in each group. There may be cases where two or more types of elements are contained at the same time.

Further, R is Y, X is Ba%, Z is Cu5D, O is γ, γ is 1.0, and X is 1.4 to 2.1S22.4 to 3.
2. A buffer material in which δ is 5.0 to 9.0 and 0.5>α>0.0 is particularly preferred.

The present invention will be specifically explained below.

First, a compound that is a superconductor (R, X5ZSD.

In A), when R is y, x is Ba5Z is Cu, and D is 0, it can be produced as follows.

As raw materials, Y2O3, CuO1BaCOa fine powder (particle size 10 μm or less) is weighed 2.73.7.71.9.5
The mixture was well mixed and calcined for 10 hours in an air atmosphere in a furnace at about 950"C. Slowly cooled to room temperature and the particle size was about 3.
After pulverizing into a fine powder of 0 μm or less, the mixture was thoroughly mixed.

In order to form the desired shape for various uses, this fine powder is pressure-molded using an arbitrary mold at a pressure equivalent to about 30 kgr, and then fired in the same atmosphere, temperature, and time as above. Let's do it.

Early fragmentary descriptions of these processes can also be found in the following literature:

■ C3 old chcl and B, Rabcau, Re
v, Chimle old nera121.407 (+984
).

■ J, G, l3erdnorz and K,
A, Muller, Z, Phys.

B 64. +89 (1988).

■ X, Ni, Wu, J, R, ^5hburn, C, N,
Torng, P, Il, IIor.

1? , L., Meng, L., Gao, Z., and J., IIuan.
g, Y, Q, Wang andC0en, Chu, Ph
ys, Rev. Lett, 58.9011 (1987)
.

Another manufacturing method is to disperse the compound in a powder state before or after calcination in a so-called binder such as alcohol or a water-soluble polymer, mold it into an arbitrary shape, and then process it under the conditions described above. It can also be obtained by firing.

Alternatively, a wet method such as a screen printing method, a sputtering method, a molecular beam epitaxial method, a plasma spraying method, etc. can also be used. In these methods, by selecting the type and properties of the substrate, it is possible to improve the performance of the product due to the so-called epitaxy effect. In addition, the product was produced under the above-mentioned calcination conditions.
Further, the properties can be improved by applying heat treatment.

The case where the superconductor is a compound (Y, Ba, Cu, 0) has been described above, but other types of elements may be added for the purpose of improving various properties such as Tc of the superconductor. Y
R, represented by Sc, is a lanthanum group element such as La, and X, represented by Ba, is S, Ca, etc.
Group elements, Z is Cu and other transition metal elements, D is O and group II chalcogen elements, and A is B1C5N5F elements. be. These may be mixed at the raw material stage, or may be achieved by methods such as diffusion or implantation during or after firing.

The superconducting oxide produced as described above can be placed in the form of a bulk or thin film at a desired location as a buffer material. For example, there may be a moving body in a broad sense such as a magnetic force or a solenoid as a counter pole, and an opposing surface such as a barrier or a stopper that defines a limit of movement may be placed to face it.

Hereinafter, the present invention will be specifically explained with reference to Examples.

Example 1 The above compound was prepared to a thickness of 2 mm over the entire barrier surface of 50×50 (■). Using liquid nitrogen as a barrier77
The temperature of the superconductor was brought to 85°C, which is below Tc.

On the other hand, a NEOMAX magnet with a diameter of 30 m5 and a thickness of 5 ee was attached to the tip of a cart with a mass of 150 gr. When the cart was moved at a speed of 3G (sm/5ee) toward the barrier with the magnet side in the lead, the cart approached the barrier by a distance of 1cm, but did not collide.

Similar experiments could also be conducted on a trolley equipped with a solenoid. In this case, it was possible to maintain an arbitrary distance by adjusting the excitation current value of the solenoid according to the weight of the trolley and feeding back the separately measured distance from the wall to the current value.

The invention can also be applied to carriages. In that case, the second
As shown in the figure. Furthermore, fff of the above-mentioned trolley or moving body
Regardless of m, it goes without saying that the invention can also be applied to larger moving bodies such as the vehicle shown in FIG.

[Effects] As explained above, the present invention simplifies the structure of the buffer part, and the range of buffering can be easily applied to large-sized, large-area, and long-length cases, and the shape and area of the installation surface can be adjusted. It is not limited and can be used for general purposes.

[Brief explanation of the drawing]

FIG. 1 is a detailed explanatory diagram of the present invention, and FIGS. 2 and 3 are detailed explanatory diagrams of the present invention. ■...Buffer material, 2...Magnetic force or solenoid, 3.
... Moving body, 4... Drive shaft.

Claims (1)

[Claims] A buffer material characterized by being composed of superconducting oxide.