Tungsten News

Tungsten News
Ammonium Paratungstate Prices Decline Slightly 169

Analysis of latest tungsten market from Chinatungsten Online Tungsten prices have generally remained stable, with the spot trading atmosphere at a standstill under pressure. This is mainly due to the slightly stronger expectation of market supply growth compared to demand recovery after the Spring Festival, coupled with slight adjustments in the long-term contract prices by tungsten enterprises. Market sentiment has cooled, resulting in increased bargaining space for products. The price of 65% black tungsten concentrate is reported at $20,493.0/ton. Market…

Tungsten News
Why Does China Implement Export Controls on Ammonium Paratungstate? 130

On February 4, 2025, China’s Ministry of Commerce and General Administration of Customs jointly issued an announcement on implementing export controls on tungsten and related items. APT, as one of 25 rare metal products and technologies, was included in the scope of export controls. This measure has attracted widespread international attention. So, why is China implementing export controls on ammonium paratungstate? I. Ammonium Paratungstate: The Core Intermediate in the Tungsten Industry Chain Ammonium paratungstate (APT), a crucial tungsten compound, is…

Tungsten News
Tungsten-Doped Vanadium Dioxide Films Advance Optoelectronic Devices 78

The metal-insulator transition (MIT) property of vanadium dioxide (VO?) makes it a crucial functional layer for numerous optoelectronic devices. However, its growth temperature requirement (450°C) and MIT temperature requirement (60°C) limit its compatibility in optoelectronic devices, especially in flexible substrate applications. Researchers from Beijing University of Technology and Tsinghua University have discovered a layer-by-layer transfer method of wafer-scale tungsten-doped vanadium dioxide films (W-VO? films), enabling low MIT temperatures (down to 40°C) and quasi-gradient doping integration. This advancement pushes the application…

Tungsten News
Tungsten Companies Lower Long-term Contract Prices 82

Analysis of latest tungsten market from Chinatungsten Online Tungsten prices adjusted slightly downwards, mainly due to the new round of lower long-term contract prices from two major tungsten companies in China. The primary reason for the decrease was the easing of the industry’s “tight supply” situation after the resumption of work following the Spring Festival, although the risk of “weak demand” remained significant. However, due to the objective fact of tightening tungsten ore resources and the instability of the international…

Tungsten News
Tungsten Concentrate and APT Prices Remain Stable 209

Analysis of latest tungsten market from Chinatungsten Online On Monday, tungsten prices continued to remain stable, with market liquidity still tight ahead of the Lantern Festival. Overall, production and trading sentiments were cautious. The market fundamentals maintained a situation of dual weakness, with policy focus mainly on the actual implementation of Sino-US relations and related tariffs and regulatory measures, as well as information from the National People’s Congress and the Chinese Political Consultative Conference in March. In the tungsten concentrate…

Tungsten News
India Scraps Customs Duties on Scrap of Tungsten & Other Critical Minerals 128

According to Reuters, India’s Finance Minister Nirmala Sitharaman stated during her annual budget speech on February 1st that India has scrapped customs duties on waste and scrap from a dozen critical minerals, including those of antimony, cobalt, tungsten, copper, lead, zinc, as well as waste and scrap of lithium-ion battery. Sitharaman said that this move will help secure their availability for manufacturing in India. Furthermore, the Indian government will also launch a policy for recovery of critical minerals from tailings…

Tungsten News
MOFCOM Spokesperson Answers Questions from Reporters on Export Controls Imposed on Tungsten and Related Items 110

MOFCOM Spokesperson Answers Questions from Reporters on Export Controls Imposed on Tungsten and Related Items Q: On February 4th, the Ministry of Commerce (MOFCOM) and the General Administration of Customs jointly issued an announcement on export controls for tungsten and related items. What considerations did China take into account when formulating this export control policy? A: On February 4th, MOFCOM, in conjunction with the General Administration of Customs, issued an announcement on export controls for tungsten and related items, implementing…

Tungsten News
China Implements Export Controls on Tungsten & Molybdenum Items 1,567

The Ministry of Commerce of the People’s Republic of China and the General Administration of Customs have decided to implement export controls on tungsten, tellurium, bismuth, molybdenum, and indium-related items to safeguard national security and interests and fulfill international obligations such as non-proliferation. The relevant items subject to export control are as follows: I. Tungsten-Related Items (1) 1C117.d. Tungsten-Related Materials: Ammonium Paratungstate (Customs HS Code for reference: 2841801000); Tungsten Oxide (Customs HS Codes for reference: 2825901200, 2825901910, 2825901920); Tungsten Carbide…

Tungsten News
What Factors Influence the Longevity of Barium Tungsten Cathodes? 102

Barium tungsten cathodes are critical components in electron emission devices. The longevity of these cathodes directly impacts the efficiency and operational lifespan of the devices they are used in. Several factors influence the durability and performance of barium tungsten cathodes, as detailed below. Operating Temperature Operating temperature is one of the most significant factors affecting the lifespan of BaW cathodes. These cathodes rely on thermionic emission, which requires elevated temperatures. However, prolonged exposure to excessively high temperatures can accelerate barium…

Tungsten News
What Are the Advantages of Using Barium Tungsten Cathodes in Electron Emission Devices? 93

Barium tungsten cathodes are widely used in electron emission devices, including vacuum tubes, cathode ray tubes (CRTs), and X-ray tubes. These cathodes are renowned for their exceptional performance characteristics, which make them indispensable in applications requiring reliable electron emission. Below are the primary advantages of using these cathodes in such devices. High Electron Emission Efficiency One of the foremost advantages is their ability to emit electrons efficiently. The incorporation of barium, which acts as a reducing agent, significantly lowers the…

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