JPH01286937A - Material for glass-spraying - Google Patents

Abstract

PURPOSE:To obtain an easily sprayable glass composition, by compounding main components consisting of SiO2, Na2O, K2O, B2O3, Li2O, Al2O3 and CaO with additives such as PbO, ZnO, TiO2, SnO2 and SrO at specific ratios. CONSTITUTION:(A) A compounded composition of main components is produced by compounding 20-70wt.% of SiO2, 0-5wt.% of Na2O, 0-7wt.% of K2O, 10-35wt.% of B2O3, 3-25wt.% of Li2O, 0-10wt.% of Al2O3 and 1-10wt.% of CaO. Separately, (B) an additive composition is produced by compounding one or more components selected from PbO, ZnO, TiO2, SnO2, SrO, BaO, F2 (substituted quantity), ZrO2, MoO3, WO3, P2O5, Sb2O5, CeO2, V2O5, Bi2O3, MgO and Tl2O. The objective material for glass-spraying is produced by adding 0-25wt.% of the component B to the component A.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION This invention relates to a glass material for thermal spraying, and more particularly to a glass material that can be easily thermally sprayed.

(Background of the Invention) For example, as disclosed in Japanese Unexamined Patent Publication No. 60-235775, it is possible to spray glass to form a glass coating on the surface of an object to be coated, such as metal or cement.

However, the reality is that no matter what kind of glass material is loaded into a thermal spraying device, a glass film is never easily formed, and in some cases, the glass material does not melt at all and leaves the thermal spraying device in its powder form. It may also be ejected. Generally 2500 to 320 in thermal spray equipment
Although it is possible to raise the temperature to about 0° C., a certain amount of time is required for the glass material to melt into a glassy state.

However, in a thermal spraying device, material is discharged at an instantaneous rate, so the glass material must be compatible with these properties. This also applies to plasma spray equipment that can obtain high temperatures.

Further, during actual thermal spraying, the object to be coated is preheated, and it is strongly required in actual construction to lower this preheating temperature.

(Problems to be Solved by the Invention) This invention was proposed under the above circumstances, and is intended to solve the problem of metals such as iron, stainless steel, and cast metals, cement,
The present invention is characterized by providing a glass material that can be easily thermally sprayed to form a glass coating on the surface of objects to be coated such as slates and ALC boards. ) The object of the present invention is to provide a glass material that can be quickly melted within a range of Another object of the present invention is to provide a glass thermal spraying material that can be thermally sprayed onto objects to be coated at a relatively low preheating temperature.

(Means for Solving the Problems) That is, the glass thermal spraying material according to the present invention contains, in at least % by weight, SiO220~70% Na2O~5% K2O 0~7% B2O3lO~35% L1203~ 25% AfL203 contains 0-10% CaOl-10% as the main component, and pbO, Z as additives.
n O, T 102 , S n 02 , S r
O, F 2 (M conversion ff1), ZrO2, MOO3, W
O,,P2O5,5b205. CeO2, V2O3, B
It is characterized by containing 0 to 25% of 2M or more of one of i2O3, MgO, and Tl2O.

(Function) Next, the function of each composition will be described in detail. Sio2 is a major 7-lith forming oxide and has a large influence on the coefficient of thermal expansion, softening point, and wear resistance. In addition, S s O
As the amount of Z increases, the abrasion resistance, weather resistance, and acid resistance increase, and the performance of the glass film improves. However, if the amount is too large, the fire resistance of the glass material increases and the spraying temperature must be increased. Therefore, in order to lower the preheating temperature of the object to be coated, the SiO2 content is set to 20 to 70%.

The reason why N a O and K 20 are set at 0 to 5% is because when other components are required, 0.01 to 091% are introduced as impurities, and they may also be added arbitrarily.

The reason why B2O3 is set to 10 to 35% is based on the reason that if it is too large, the abrasion resistance, weather resistance, and acid resistance will deteriorate, and if it is -, the frit fire resistance will be reduced.

In view of the relationship with other components in the present invention, it is preferable that the amount is about 10% or more, and if it exceeds 35%, hot water resistance, weather resistance, and acid resistance will deteriorate. When B2O3 is increased, melting occurs quickly in the flame of the thermal spray device.

Adding L120 increases the electrical resistance of the product.

This is also to increase hardness and improve chemical durability, especially acid resistance. Replacing soda with L l 20 leads to a decrease in specific gravity, a decrease in the coefficient of thermal expansion, an increase in fluidity, a decrease in the melting temperature, and a decrease in the softening and solidification temperatures, and therefore it is desirable to include as much as the expansion coefficient allows. The smaller the number, the faster it will melt in the frame and the more gloss it will have.

A! 1203 is a glass forming auxiliary component that improves the performance of the glass film, but if it exceeds 10%, the melting temperature of the glass material increases.

CaO acts as a fluxing agent and improves chemical durability. That is, it increases the resistance of the wood to the dissolving action, and also increases the hardness and therefore the resistance to abrasion and weathering action.
It increases tensile strength and significantly lowers the coefficient of expansion, thereby preventing cracks. It also reduces the viscosity when melted. SnO□, SrO, lowers the fire resistance.

As additives, PbO, ZnO, TiO2, SnO2
, S r O, F 2 (substitution amount), Z r O
z2Mo0. , WO3, P2O5, Sb, 205,
CeO2, V2O5, Bi2031MgOB1203l
The reason for adding 0 to 25% of one or more of these is that the fire resistance of the glass material can be lowered by the synergistic action of the main components and additives.

Furthermore, these additives allow the glass material to melt more quickly during thermal spraying. Furthermore, depending on the amount added, these additives can improve film performance such as weather resistance and acid resistance.

SrO acts as a fluxing agent, increasing fluidity, lowering the softening temperature, and increasing the degree of melting. When CaO is replaced with SrO in the molecular weight ratio, the thermal expansion coefficient becomes slightly larger, but when the entire amount is replaced, the thermal expansion decreases. Not only does the coefficient not change, but also a good glass material can be obtained.

When CaO or BaO is replaced with SrO, the reaction with the base material is promoted, the adhesion of the glass material is improved, and the peel strength is also increased.

Furthermore, when both ZnO2 and SrO are used, the fluidity of the glass increases, making it easier to generate a smooth glass surface and reducing pinholes.

Z n O2 acts as a solvent, imparting gloss to the glass material, limiting the action of chromophores, and sometimes imparting emulsivity. However, it cannot be added in large amounts because the viscosity increases significantly.

Furthermore, since shrinkage of the glass material is prevented, peeling of the glass material that occurs as a result of shrinkage is prevented, and adhesion of the glass film to carbon during thermal spraying is also prevented.

F2 acts as a flux, lowering the fire resistance of the glass material,
Helps melt glass materials in flames. Also, pb
o has almost the same effect as F2 described above.

(Example) The following table shows blending examples of glass spraying materials according to the present invention.
1 to No. 17.

The glass material having the above formulation was loaded into an oxyacetylene thermal spraying apparatus and sprayed onto the surface of an iron plate preheated to 100 to 700°C to obtain a glass coating with a thickness of 0.05 to 5 cm. Incidentally, it is preferable that the surface of the iron plate be subjected to sand or shot blasting treatment in advance.

According to the glass material of the above example, an extremely good glass coating could be formed on the surface of the object to be coated which had been preheated to 100 to 700°C. The fluidity of the glass material was good and there were almost no cracks after thermal spraying.

In addition, when applying an appropriate color to the glass, a desired amount of known pigments are mixed. As a pigment.

Cod, Nip, MnO2, Cub, Fe2O3゜Cr
2O3,5n021Ti02. V2O5, NbO*
Z r S 10 * M o O, W O3, P
r 20, Nd2O3, etc., or in the form of a compound (for example, about 5%).

As explained above, according to the present invention, it is possible to provide a glass material that allows glass thermal spraying, which was previously thought to be difficult, to be carried out extremely easily, and to bring great benefits to this type of technical field. was completed. In particular, according to this invention, glass can be melted quickly in the flame of a thermal spraying device, and at the same time, the object to be coated can be preheated to a relatively low temperature, making it an extremely practical and highly practical glass. We were able to provide materials for thermal spraying.

Claims (1)

[Claims] Contains as main components at least in weight percent: SiO_2 20-70% Na_2O 0-5% K_2O 0-7% B_2O_3 10-35% Li_2O 3-25% Al_2O_3 0-10% CaO 1-10% In addition, PbO, Z
nO, TiO_2, SnO_2, SrO, F_2 (substitution amount), ZrO_2, MoO_3, WO_3, P_2O_
5, Sb_2O_5, CeO_2, V_2O_5, Bi
A material for glass thermal spraying characterized by containing 0 to 25% of one or more of _2O_3, MgO, and Tl_2O.