Barium tungsten cathodes are used in signal lights, specifically in electron tubes and cathode-ray tubes (CRTs), for several reasons:

This week, China rare earth prices have shown an overall pattern of stability followed by a slight decline. The market sentiment has been somewhat stagnant due to the interweaving of bullish and bearish factors, resulting in subdued trading activity and limited transactions. 

Analysis of latest tungsten market from Chinatungsten Online

Chinese tungsten prices are currently showing a weak and stable trend. Suppliers at the mining end are maintaining a cautious attitude, preferring to hold onto their stocks in hopes of supporting prices. However, the sluggish demand on the consumer end is dampening confidence among participants, leading to less-than-ideal trading and shipments in the market. 

This week, China molybdenum prices have shown an overall downward trend, primarily due to reduced market demand, increased profit-taking by some suppliers, and weak international molybdenum market conditions.