Savings in the jewellery industry, in science and in electronics - thanks to a ceramic capillary burner

Savings in the jewellery industry, in science and in electronics - thanks to a ceramic capillary burner

17. 06. 2013

At present, the company Luigi Dal Trozzo and others supply sets for fine welding (e.g. to jewellery manufacturers, science and the electronics industry) which consist of an electrolyser for decomposing water to hydrogen and oxygen, completed with a microburner.

The microburner consists of a body containing a control valve, completed with a replaceable steel capillary. When the burner is in operation, the steel capillary heats up quite rapidly and often has to be replaced.

Scientists from the Institute of Microelectronics have come up with an innovative design which extends the life-time of the microburner. The innovative idea is to furnish the original steel capillary with a ceramic liner (Al2O3 – alumina) with the following parameters (length approx. 10 to 15 mm, inner diameter 0.4 mm and outer diameter 1 mm). The ceramic capillaries are manufactured by the company BRISK Tábor and are made of a material called OXAL. The liner is applied into the original capillary using ordinary silicone or epoxy glue. Despite this, the capillary tip can withstand temperatures higher than 1600 °C due to the fact that the liner is cooled by the incoming hydrogen. Since starting to use the ceramic capillary, there has been no need to change the burner and it also shows no signs of wearing out. 

The device is protected by the IPO CZ as a utility model.


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