China escalated its economic retaliation against the United States by banning all gallium exports in December 2024, cutting off nearly 100% of the global supply of the critical semiconductor material. The move follows a 2023 restriction on gallium shipments and comes as tensions over advanced chip technology continue to rise between the two nations.

Gallium is essential for producing gallium nitride (GaN) semiconductors, a technology widely seen as the next generation for microchips used in 5G networks, electric vehicles, and military systems. Unlike traditional silicon chips, GaN semiconductors operate at higher frequencies and temperatures, making them more efficient and powerful for critical applications.

The United States now faces a supply chain crisis with no immediate solution. The U.S. National Defense Stockpile, a reserve meant to protect against sudden shortages of strategic materials, held zero gallium when China’s ban took effect. Analysts warn this mirrors a historic mistake made with silicon semiconductors decades ago, when America ceded control of the supply chain to foreign producers.

China’s escalating export controls on critical minerals

China’s gallium ban is the latest in a series of export restrictions targeting minerals and materials vital to semiconductor and defense industries. In 2023, Beijing imposed controls on gallium exports in response to U.S. restrictions on advanced chip shipments to China. The December 2024 ban marks a significant escalation, effectively severing gallium trade with the U.S.

Gallium is primarily extracted as a byproduct of aluminum and zinc refining, with China dominating 99% of global production. Other countries with smaller gallium industries include Japan, Germany, and Canada, but none can replace China’s volume or scale. The U.S. currently imports nearly all its gallium, leaving it vulnerable to geopolitical pressure.

The rise of gallium nitride and U.S. semiconductor dependency

Gallium nitride semiconductors are increasingly replacing silicon in high-performance applications due to their superior efficiency and speed. GaN chips are now used in 5G base stations, radar systems, and power electronics for electric vehicles. The U.S. military also relies on GaN technology for radar, electronic warfare, and next-generation weapons systems.

Despite its strategic importance, the U.S. has no domestic gallium production and minimal processing capacity. Historically, America pioneered silicon semiconductor technology in the mid-20th century but gradually lost control of the supply chain as production shifted to Asia. The gallium shortage threatens to repeat this pattern with a new generation of critical materials.

Policy failures and potential solutions

The U.S. government has taken steps to address mineral supply vulnerabilities, including the 2022 CHIPS and Science Act, which allocated $52 billion for semiconductor manufacturing incentives. However, the law focuses on chip fabrication rather than raw material supply chains. The Department of Defense has also announced plans to expand domestic mining and processing of critical minerals, but these efforts will take years to materialize.

Private industry is beginning to respond. Companies like Materion and Albemarle are exploring gallium extraction and refining projects in the U.S. and allied nations. Some analysts suggest stockpiling gallium or negotiating with allied countries to diversify supply, but none of these measures offer a rapid solution.

The broader implication is a potential slowdown in the deployment of advanced technologies dependent on GaN semiconductors. The U.S. risks falling behind in industries like 5G infrastructure, artificial intelligence hardware, and next-generation defense systems if it cannot secure a stable gallium supply. The situation underscores the fragility of global supply chains in an era of intensifying geopolitical competition.

For now, the U.S. must navigate a period of uncertainty, balancing diplomatic pressure with immediate supply chain disruptions. The gallium ban serves as a stark reminder that technological leadership requires control over not just design and manufacturing, but the raw materials that power the future.

What You Need to Know

  • Source: War on the Rocks
  • Published: April 21, 2026 at 08:00 UTC
  • Category: War
  • Topics: #defense · #military · #geopolitics · #war · #conflict · #repeating-its-silicon

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Curated by GlobalBR News · April 21, 2026

🇧🇷 Resumo em Português

O mundo assistiu com apreensão ao novo capítulo da guerra tecnológica entre China e Estados Unidos quando Pequim anunciou a proibição da exportação de gálio, material crítico para a produção de chips de nitreto de gálio — componente-chave em radares avançados, sistemas de comunicação 5G e armamentos de ponta. A medida, que afeta 99% do fornecimento global desse mineral, expõe a vulnerabilidade americana em uma cadeia de suprimentos já fragilizada pela dependência de componentes estratégicos asiáticos, reacendendo os temores de um novo “erro do silício”.

Para o Brasil e os leitores de língua portuguesa, o episódio soa como um alerta sobre os riscos de uma dependência excessiva de insumos controlados por potências rivais em setores sensíveis. O nitreto de gálio, por exemplo, é vital não apenas para a indústria de defesa, mas também para a modernização de infraestruturas críticas, como redes elétricas inteligentes e equipamentos médicos. A decisão chinesa reforça a necessidade de o Brasil diversificar suas parcerias tecnológicas e investir em pesquisa local para não ficar refém de oscilações geopolíticas, especialmente em um cenário onde a soberania industrial se torna cada vez mais uma questão de segurança nacional.

A bola agora está com Washington: se os EUA não conseguirem contornar a escassez ou desenvolver alternativas rápidas, a dependência do gálio pode se transformar em um ponto fraco em sua estratégia de defesa, abrindo espaço para que outros países, como a Índia ou nações europeias, ocupem lacunas no mercado.

🇪🇸 Resumen en Español

China ha dado el primer zarpazo en la guerra tecnológica al prohibir las exportaciones de galio, un mineral crítico que domina en un 99% de la producción mundial, dejando a Estados Unidos al borde de un nuevo cuello de botella industrial. La medida, que entra en vigor este mes, amenaza con paralizar cadenas de suministro clave en sectores como defensa, telecomunicaciones y energías renovables, donde componentes basados en nitruro de galio son esenciales para sistemas de radar, satélites y redes 5G.

El conflicto por el galio refleja la vulnerabilidad de Occidente ante la dependencia de recursos estratégicos controlados por Pekín, similar a la crisis de los microchips de silicio que aún resuena en la industria automotriz. Para los hispanohablantes, esta escalada tiene un doble impacto: por un lado, encarece y ralentiza tecnologías en las que Europa y Latinoamérica ya compiten en desventaja, como la transición digital y la electrificación de vehículos; por otro, refuerza la urgencia de diversificar proveedores y acelerar la investigación en alternativas, donde España y otros países podrían ganar peso si actúan con rapidez. La partida por el dominio de materiales raros ha dejado de ser un tablero lejano para convertirse en una carrera con consecuencias inmediatas para el bolsillo y la seguridad de los ciudadanos.