Iridium crucible plated with protective layer on surface

Abstract

The utility model discloses an iridium crucible with the surface plated with a protective layer, which comprises an iridium crucible body, the outer surface of the iridium crucible body is fixedly connected with an outer coating, the inner wall of the iridium crucible body is fixedly connected with an inner coating, the outer coating comprises a heat preservation layer, a reinforcing layer and an anti-corrosion layer, the reinforcing layer is fixed on the outer side of the heat preservation layer, and the anti-corrosion layer is fixed on the outer side of the heat preservation layer. According to the iridium crucible with the surface plated with the protective layer, the inner coating is arranged in the iridium crucible body, corrosion to the inner surface of the iridium crucible body is relieved through the barium hydroxide saturated solution coating, the heat preservation layer is arranged and adopts a chromium-molybdenum steel plate, the heat preservation effect is effectively improved, and the reinforcing layer is a silicon carbide fiber membrane, so that the external impact resistance effect is improved; according to the anti-corrosion iridium crucible, the protective coatings are arranged inside and outside the iridium crucible, so that the melt hydraulic pressure resisting strength of the iridium crucible is effectively improved, and the overall anti-corrosion performance is efficient.

Description

Technical Field

[0001] The utility model relates to the field of products related to iridium crucibles, in particular to an iridium crucible with a protective layer plated on the surface. Background Art

[0002] The medium frequency induction heating method is used for crystal growth. The crucible is the container for the crystal raw material and is also the core medium frequency induction heating component. Therefore, the selection of crucible material is the most important issue to be considered in the early stage of crystal growth. It is necessary to comprehensively consider the physical and chemical properties of the crystal and the crucible, such as the melting point of the crystal material, the atmosphere used, the thermal vibration resistance and machinability of the crucible, etc. The medium frequency induction pulling method is used to grow high melting point crystals (melting point higher than 1900℃) generally using iridium crucibles. For example, iridium crucibles are mainly used to grow sapphire crystals, lutetium silicate (LSO), lutetium yttrium silicate (LYSO), YAG and other crystals.

[0003] However, the existing iridium crucibles do not have protective coatings on the inside and outside, which results in low overall stability of the iridium crucibles, which are prone to cracking and leakage, leading to growth failure and causing great losses. Utility Model Content

[0004] The utility model aims to provide an iridium crucible with a protective layer plated on the surface, so as to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solution: an iridium crucible with a protective layer on the surface, comprising an iridium crucible body, an outer coating layer fixedly connected to the outer surface of the iridium crucible body, an inner coating layer fixedly connected to the inner wall of the iridium crucible body, the outer coating layer comprising a thermal insulation layer, a reinforcement layer and an anti-corrosion layer, the reinforcement layer is fixed to the outside of the thermal insulation layer, and the anti-corrosion layer is fixed to the outside of the reinforcement layer.

[0006] Preferably, the thermal insulation layer is a chromium-molybdenum steel plate.

[0007] Preferably, the reinforcement layer is a silicon carbide fiber membrane.

[0008] Preferably, the anti-corrosion layer is a copper-nickel alloy plate.

[0009] Preferably, the inner coating is a coating of a saturated barium hydroxide solution.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] The iridium crucible with a protective layer on the surface is provided with an inner coating inside the iridium crucible body, and a saturated barium hydroxide solution coating is used to slow down the corrosion on the inner surface of the iridium crucible body. The thermal insulation layer is provided with a chromium-molybdenum steel plate to effectively improve the thermal insulation effect. The reinforcement layer is a silicon carbide fiber membrane to improve the external impact resistance effect. The anti-corrosion layer is a copper-nickel alloy plate to reduce the corrosion effect of the external environment on the surface of the iridium crucible body. The utility model effectively improves the iridium crucible's resistance to melt hydraulic pressure by providing protective coatings inside and outside the iridium crucible, and the overall anti-corrosion performance is highly efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of an iridium crucible with a protective layer plated on the surface of the utility model;

[0013] Figure 2 The utility model is a schematic diagram of the outer coating structure of an iridium crucible with a protective layer plated on the surface.

[0014] In the figure: 1. Iridium crucible body; 2. Outer coating; 3. Inner coating; 4. Insulation layer; 5. Reinforcement layer; 6. Anti-corrosion layer. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0016] See also Figure 1-2 The utility model provides an embodiment: an iridium crucible with a protective layer on the surface, comprising an iridium crucible body 1, an outer coating 2 is fixedly connected to the outer surface of the iridium crucible body 1, an inner coating 3 is fixedly connected to the inner wall of the iridium crucible body 1, the outer coating 2 comprises a thermal insulation layer 4, a reinforcement layer 5 and an anti-corrosion layer 6, the reinforcement layer 5 is fixed on the outer side of the thermal insulation layer 4, and the anti-corrosion layer 6 is fixed on the outer side of the reinforcement layer 5.

[0017] In this embodiment, the thermal insulation layer 4 is a chromium-molybdenum steel plate; the reinforcement layer 5 is a silicon carbide fiber membrane; the anti-corrosion layer 6 is a copper-nickel alloy plate; and the inner coating 3 is a barium hydroxide saturated solution coating.

[0018] Working principle: First, an inner coating 3 is arranged inside the iridium crucible body 1, and a saturated barium hydroxide solution coating is used to slow down the corrosion of the inner surface of the iridium crucible body 1, and the insulation layer 4 is set with a chromium-molybdenum steel plate to effectively improve the insulation effect, the reinforcement layer 5 is a silicon carbide fiber membrane to improve the external impact resistance, and the anti-corrosion layer 6 is a copper-nickel alloy plate to reduce the corrosion effect of the external environment on the surface of the iridium crucible body 1.

[0019] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. An iridium crucible with a protective layer on the surface, comprising an iridium crucible body (1), characterized in that: The outer surface of the iridium crucible body (1) is fixedly connected to an outer coating (2), the inner wall of the iridium crucible body (1) is fixedly connected to an inner coating (3), the outer coating (2) comprises a thermal insulation layer (4), a reinforcement layer (5) and an anti-corrosion layer (6), the reinforcement layer (5) is fixed to the outer side of the thermal insulation layer (4), and the anti-corrosion layer (6) is fixed to the outer side of the reinforcement layer (5).

2. The iridium crucible with a surface protective layer according to claim 1, characterized in that: The thermal insulation layer (4) is a chromium-molybdenum steel plate.

3. The iridium crucible with a surface protective layer according to claim 1, characterized in that: The reinforcement layer (5) is a silicon carbide fiber membrane.

4. The iridium crucible with a surface protective layer according to claim 1, characterized in that: The anti-corrosion layer (6) is a copper-nickel alloy plate.

5. The iridium crucible with a surface protective layer according to claim 1, characterized in that: The inner coating (3) is a coating of a saturated barium hydroxide solution.

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