*Introduction of synthetic materials and characteristics of base liquid alloys (*Indium-tin alloys)

*Indium-tin alloy is a new liquid metal that is non-toxic, non-polluting, and has a low melting point. It is mainly used for heat sinks and semiconductors for thermometers and electronic equipment.

* The base liquid alloy material consists of the following components and mass percentages: 68.5% of *, 21.5% of indium and 10% of tin. According to the ratio, the metal crucible was placed in a sealed flask and heated to 50° C. in a water bath. At a constant temperature, the crucible was in a liquid state; then, indium, tin, bismuth, and zinc were put into the liquid state. Metal germanium glassware; under argon protection, stirring with a glass rod until indium, tin, antimony and zinc are completely dissolved as a liquid, and mixed uniformly, and kept at 50 ° C for 10 minutes to obtain a germanium-based alloy.

Due to the small surface tension of the liquid*, it adheres to the walls of glass or plastic containers, resulting in a small amount of * added during final feeding. Therefore, in the preparation, it is preferable to use a solid-state*, and if * is melted, it can be frozen in a freezer first, and then it can be taken out after solidification, which can effectively avoid reduction in the amount of material to be charged. As for indium, indium particles can be used. This is mainly for the convenience of mixing with tin and the molten alloy can be formed relatively quickly after melting. Also, in order to facilitate the fusion, it is more preferable to use metal tin particles.

A wide range of low-temperature metal alloys are widely used, mainly fused with low-melting metal alloys such as beryllium aluminum alloys, niobium alloys, antimony tin alloys, and gallium-indium alloys. Tantalum based alloys, antimony tin alloys, tin antimony alloys.

The liquid metal coolant is mainly composed of a low-melting alloy (such as Ga-Bi-Pb-In), which generally has a low melting point, a high boiling point, a large specific heat capacity, and a good thermal conductivity, and has a fluidity at room temperature, but is generally liquid. Metals have a certain degree of corrosiveness to metallic materials.

Finally, we will introduce the properties and product characteristics of conventional Indium-Tin alloys.

General* Indium-tin alloy properties:

Composition: Ga:In:Sn = 68.5%:21.5%:10% Melting point: 6-12°C Boiling point: 1300°C

Density: 6.44 g/cm3 at 20°C Steam pressure: 10−8 Torr (at 500°C)

Viscosity: 0.0024 Pas (at 20°C) Thermal conductivity: 16.5 W/m/K

Conductivity: 3.46x10-6 S/m(at 20°C) Surface tension: 0.718 N/m(at 20°C)

Product Features:

1. It is a type of fusible alloy with gray and white shiny metal, based on cesium elements, * elements, etc.

2. Melting point has 6°C, 20°C, 47°C, 70°C, 92°C, 120°C and other options; low melting point alloy can be melted by water bath method or oil bath method.

3. Strength 30 MPa at room temperature, elongation 3%, hardness 25 HBS.