[Solution Case] Development of Thorium Tungsten Alternative Materials

A case where results equivalent to those of previous thorium tungsten evaluations were obtained.

Thorium tungsten is a material that adds thorium oxide to tungsten, resulting in a low work function, good electron emission properties, and stable discharge characteristics. However, thorium oxide is a radioactive substance, and its manufacturing requires inspection and approval, with finished products containing it also subject to NORM guidelines. Taking into account the requests and issues of various lamp manufacturing companies both domestically and internationally, we collaborated with Japan Tungsten to develop materials that can withstand lamp usage. Development was primarily focused on neodymium oxide and hafnium oxide, achieving evaluation results in lamp lighting assessments—considering crystal growth, strength, toxicity, discharge characteristics, blackening, and lifespan—comparable to those of conventional thorium tungsten. *For more details, please refer to the external link page or feel free to contact us.*

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