JPS62108751A - Heat ray reflecting coated glass - Google Patents

Abstract

PURPOSE:To obtain the titled heat ray reflecting coated glass resistant to the erosion of acids and alkalis, the coated film of which is hardly damaged when cleaned, and appropriate for the window of a building, etc., by coating molybdenum silicide on the surface of glass as the heat ray reflecting coated film. CONSTITUTION:A molybdenum silicide coated film is formed on the surface of glass by sputtering, etc., as the heat ray reflecting coated film, and the desired heat ray reflecting coated glass is obtained. An appropriate light transmittance of about 30% can be obtained by regulating the thickness of the molybdenum silicide coated film to 50-300Angstrom . The molybdenum silicide contg. about 30-40wt% Si is preferably used.Silicon and metallic molybdenum are mixed to obtain the composition, the mixture is heated and melted in a plasma-arc melting furnace, etc., and the obtained alloy is crushed to obtain the molybdenum silicide.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field 1] The present invention relates to a hot-ray reflection q.1 guard used in windows for houses, buildings, automobiles, etc.

[Prior art] In order to prevent the incidence of heat rays such as direct sunlight or to spoil the appearance, heat rays are applied to the window of a soup or medium-sized product (
ll'l child came to be used. Conventional heat ray reflective glass is a heat ray reflective glass in which a metal chromium coating is formed mainly by sputtering on a normal plate glass and coated with a heat ray reflective film.

``Problem to be solved by the invention 1 The conditions that heat-reflecting glass should have are that it blocks the transmission of light, but it is necessary to maintain a certain level of brightness inside the window, and the light transmittance is about 30%1. !?It is necessary to ensure that the film is thin.
In addition to corrosion resistance, it is also necessary to have corrosion resistance against acids and alkalis contained in the environmental atmosphere, and low resistance to peeling off the MI film or scratches caused by scratches when cleaning dirt adhering to glass. Although conventional metal coatings have satisfactory properties in terms of light-shielding properties and corrosion resistance, they suffer from the disadvantage that they are easily damaged by scratches caused by cleaning personnel.

In view of the above-mentioned circumstances, the object of the present invention is to provide a pair of heat-reflecting glass whose coating has improved damage resistance.

[Means for Solving the Problems 1] The present invention uses silicon as the main component, which is strong enough to melt glass, and has a heat-reflecting coating of molybdenum silicide, which has excellent corrosion resistance, high hardness, and long durability (also has a layer of stiffness). It is characterized by its use in many ways.

Molybdenum silicide is a conductive target that can be discharged even with DC sputtering Vi@, which is a commonly used coating manufacturing equipment.

The molybdenum silicide according to the present invention has a stoichiometric composition as an intermetallic compound.

The composition represented by S1□0, that is, 3i in weight% is 3
A composition mainly containing 6.8% is preferable from the viewpoint of preventing local variations in the coating. In order to maintain adhesion with glass, 3i is desirably 30wt% or more.On the other hand, if Si exceeds 40wt%, chemical stability becomes poor, so the Sl content m in the present invention is 30 to 30wt%.
Preferably, the content is between 40 wt%.

Second, in the present invention, the coating is a silicide of a corrosion-resistant metal other than molybdenum, such as W.

It is also possible to use other PvD or CVD methods for forming the film.

[Example] The present invention will be described in detail below based on Examples.

Metallic molybdenum and silicon are mixed and the alloy melted in a plasma arc melting furnace is pulverized, the powder is formed by HIP, and then processed into a disk with a diameter of 70 mm and a thickness of 3 mm, and the disk is bonded to a Cu backing plate. Five sputtering targets were used to form a molybdenum silicide film.

The silicon content of the five target samples obtained was 26.5%, 30.2%, and 37.0% by weight, respectively.
, 39.9% and 45.0%. As the glass sample to which the film was attached, a commercially available window glass having a thickness of 3 ml and 1 m was cut into a width of 50 am and a length of 50+all+.

Further, the chromium-coated heat reflective coated glass used for comparison is a commercially available product with a thickness of 3Il1m.

The molybdenum silicide target prepared as described above was sputtered onto a glass substrate using a two-pole DC sputtering device to form a molybdenum silicide film. The thicknesses of the resulting coatings were 50, 200, and 350A, respectively.

Next, a corrosion resistance test was performed by immersing these coated glasses in dilute sulfuric acid and dilute ammonia water for 3 months at room temperature. The film was washed with water and the damage to the film was investigated. Also, in t!
The sunlight transmittance was measured.

These results are shown in Tables 1 to 4.

Molybdenum silicide film 1 after immersion in dilute sulfuric acid for 3 months
Table 1 showing the test results and the IQ of the molybdenum silyl 4-noid coating after immersion in dilute ammonia water for 3 months [J
As is clear from Table 2 showing the test results, silicon i 30
In the case of a molybdenum silicide film containing less than wt%, the H'A material peels off due to wiper wear even after being immersed in either acid or alkali liquid.

This is thought to be due to insufficient adhesion to glass due to lack of silicon, since molybdenum is resistant to dilute sulfuric acid even if free molybdenum is produced. If silicon exceeds 40W [%, peeling will occur with dilute ammonia water, but this is due to excessive V1
This is thought to be because silicon release is weak to alkali. Therefore, as the silicon g Rfft in J3 of the present invention (30 to 40wt, which is resistant to both acid and alkali)
% is desirable.

Table 1 Table 2 On the other hand, it was immersed in dilute sulfuric acid and dilute ammonia water for 3 months. i1
r! The third part showing the chrome coating damage test unity and sunlight transmittance of
As is clear from the table, the Or coated material causes abrasion in both acid and alkali conditions.

This is thought to be due to the softness of pure metals.

Table 3 Also, from Table 4 showing the sunlight transmittance of molybdenum silicide coated glass, it can be said that a film thickness of 100 to 300A is preferable in order to make the sunlight transmittance of molybdenum silicide about 30%.

Table 4 [Effects of the Invention] As described above, by using the molybdenum silicide II film as a glass coating, it is resistant to both acid and alkali corrosion, and the glass coating is less likely to be damaged during cleaning. Moreover, it is possible to achieve a product (9) that is superior to the conventional heat ray reflective coated glass with a Cr coat, which has an appropriate light transmittance.

Mr. Commissioner of the Japan Patent Office [Yes] Indication of the case 1985 Patent application No. 248304 Title of the invention Relationship to the case of person who corrects heat ray reflective coating glass Patent applicant address 2-1-2 Marunouchi, Chiyoda-ku, Tokyo Name ( 5
08) Hitachi Kinkutsu Co., Ltd. Subject of amendment Aki Myu's "Claims" column and "Detailed Description of the Invention" column.

Contents of the Amendment As shown in the attached document, the description in the "Claims" column of the Prospectus I will be corrected as follows.

"<1) A heat ray-reflecting coated glass whose Vf characteristic is that the glass surface is coated with molybdenum silicide as a heat-ray reflective coating.

(2) The heat ray reflective coated glass according to claim (1), wherein the molybdenum silicide film is formed by sputtering.

(3) The thickness of the molybdenum silicide film is Maki~300
The heat ray reflective coated glass according to claim (1), which is Δ. ” ■The statement in the “Detailed Description of the Invention” column of the specification is corrected as follows.

1. Correct "Film thickness 100-300Δ" on page 7, line 7 to "Film thickness 50-100A J."

2. Replace Dosei Table 4 as shown in the attached sheet.

Claims (3)

[Claims] (1) A heat ray reflective coated glass characterized in that the glass surface is coated with molybdenum silicide as a heat ray reflective coating. (2) The heat ray reflective coated glass according to claim (1), wherein the molybdenum silicide film is formed by sputtering. (3) The thickness of the molybdenum silicide film is 70 to 30
The heat ray reflective coated glass according to claim (1), characterized in that it has a thickness of 0 Å.