Fully transparent tube type resistance furnace

Abstract

The invention discloses a fully transparent tube type resistance furnace. The resistance furnace has the following characteristics: an outer casing and a heating pipe are made of transparent quartz tubes; the transparent structure is convenient for adding material, firing and observing, and can help shorten the period required by optimizing material preparation process window; a furnace chamber, namely a chamber between the outer casing and the heating pipe, adopts vacuum and serves as a heat insulating layer; not only is the cost greatly reduced, but also fast cooling can be realized when the furnace chamber is not under the vacuum state; a vacuum insulation layer reduces the oxidation of electric heating wires and ensures long-term stable running of the resistance furnace; the density of heating wires wrapped on the heating pipe directly determines the distribution of temperature zones, and the adjustment of temperature zones can be realized through the adjustment of the arrangement of the heating wires; a quartz liner tube is adopted to prevent the contamination of reactants to a heating inner tube and contamination between different materials, and different designs of the structure of the quartz liner tube can lead to different distribution situations of fluid field, so that material preparation becomes flexible and diversified.

Description

technical field [0001] The invention belongs to electric furnace equipment, in particular to a fully transparent tubular resistance furnace. Background technique [0002] Tubular resistance furnaces are widely used in ceramics due to the advantages of convenient operation, balanced temperature field, fast temperature rise and fall, accurate temperature control, low energy consumption, and the protection of various gases (oxygen, nitrogen, argon, hydrogen, etc.). , metallurgy, electronics, glass, chemical industry, machinery, refractory materials, new material development, special materials, building materials and other fields. In recent years, the application of tubular resistance furnaces in the preparation of new and special materials has become more and more prominent, especially in the preparation of one-dimensional micro-nano materials. In recent years, in order to understand the exotic physical properties of one-dimensional micro-nano materials (nanowires, nanobelts...

AI Technical Summary

Problems solved by technology

However, in the process of preparing one-dimensional micro-nano materials, the traditional tube furnace has exposed some shortcomings

First, because the furnace body is opaque, the situation inside the furnace cannot be observed at any time

Therefore, we can only explore the conditions one at a time, which not only increases the difficulty of firing, but also consumes a lot of time and resources

The second is that traditional tube furnaces often use materials such as ceramic fiber plates with low thermal conductivity as the insulation layer.

Although this is beneficial to heating, it is time-consuming due to slow heat dissipation during annealing.

Third, the cost of the insulation material used in the furnace is relatively high

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