Gallium

Gallium itself is never used in pure metallic form in weapons — its strategic value lies in two compound semiconductors it enables: gallium arsenide (GaAs) and gallium nitride (GaN). Per CSIS (Jul 2025), open-source assessments identify more than 11,000 individual parts across the U.S. Department of Defense that require gallium, and roughly 85% of defense supply chains containing gallium include at least one Chinese supplier.

1. GaAs in the F-35's AN/APG-81 AESA radar

The AN/APG-81 Active Electronically Scanned Array, built by Northrop Grumman for the F-35 Lightning II, uses gallium arsenide transmit/receive modules to provide simultaneous air-to-air and air-to-ground engagement, electronic warfare, and high-resolution ground mapping. GaAs remains the incumbent semiconductor for many fielded AESA arrays, including earlier-generation fighter and surface radars, even as newer programs transition to GaN.

2. GaN in the Patriot GEM-T and LTAMDS (GhostEye) missile-defense radars

Raytheon (now RTX) has invested more than $200 million over 16+ years developing military-grade GaN, replacing the Patriot's legacy gallium-arsenide-based traveling-wave-tube radar with a solid-state GaN Active Electronically Scanned Array (Defense News, Feb 2016). The GaN-based AN/MPQ-65A array cut Patriot's annual operations and maintenance costs by up to 50% while enabling 360-degree coverage (U.S. Army Patriot program documentation). The Patriot's GEM-T interceptor also received solid-state GaN transmitters in 2018 (CSIS Missile Threat, Feb 2019). Its successor, the LTAMDS (GhostEye) radar built by RTX for the U.S. Army's Integrated Air and Missile Defense architecture, uses GaN components to deliver more than twice the performance of the legacy Patriot radar with 360-degree detection; the Army placed a $1 billion year-two production order for LTAMDS in early 2026 (Military Aerospace, Feb 2026).

3. GaN across the wider U.S. radar fleet

Per CSIS (Jul 2025), GaN-backed modules have been integrated into the Navy's AN/SPY-6 radar, the Marine Corps' G/ATOR radar, the Army's LTAMDS radar, the Missile Defense Agency's AN/TPY-2 radar, and the F-35's upgraded AESA radar. GaN transistors operate at higher voltages and temperatures with lower losses than GaAs, enabling smaller, higher-resolution, longer-range radar modules with reduced size, weight and power draw.

4. Gallium arsenide solar cells for defense and intelligence satellites

Multi-junction GaAs solar cells offer substantially higher conversion efficiency and radiation tolerance than silicon, making them the standard power source for national security and commercial satellites. 5N Plus's DPA Title III-funded Utah facility produces the germanium substrates on which these GaAs space solar cells are grown, directly feeding defense and commercial satellite supply chains (Department of War press release, 29 Jan 2026).

The United States has never sourced a majority of its gallium directly from China — but indirect exposure through GaAs wafers, recycled scrap, and third-country intermediaries runs much deeper than direct trade statistics suggest (CSIS, Jul 2025).

China's export collapse to the United States, 2023–2026

U.S. import sourcing shift

Per Stimson Center (Mar 2025), U.S. gallium imports overall fell 77% from 2021 to 2024, while direct Chinese imports fell even further: China's cumulative share of U.S. gallium metal imports dropped from roughly 53% during 2018–2021 to 18% during 2021–2024. Germany's share of U.S. gallium imports rose 1,111% between 2022 and 2024, reaching 22% — but Germany has no primary gallium production and instead recycles semiconductor-manufacturing scrap that is often ultimately of Chinese-refined origin.

U.S. imports of gallium arsenide wafers from China effectively stopped in April 2025 and have remained at zero since, per ThinkChina analysis of U.S. Census Bureau data (Apr 2026). GaAs wafer import volumes averaged just ~140,000 kg/year across 2023–2025, down from 424,000 kg in 2022 alone. Despite this, total U.S. industrial gallium consumption stayed resilient: 19,700 kg in 2022 versus roughly 19,000 kg in 2025 (just 3.5% below the 2022 peak), as importers substituted volume from Canada, Japan, Germany, Taiwan, South Korea and Slovakia.

A compact chronology of the events that turned gallium from a niche semiconductor input into a front line of U.S.-China technology competition. Each entry links to the primary record.

1. The Bayer process: why alumina refiners, not miners, control gallium supply

Gallium substitutes isomorphously for aluminium in bauxite ore at concentrations of roughly 20–80 parts per million. During the Bayer process, approximately 70% of that gallium dissolves into the caustic sodium aluminate liquor used to extract alumina, while the remaining 30% is lost to bauxite residue (red mud); because the liquor recirculates continuously, gallium concentrates over time to 100–500 mg/L, at which point it becomes economical to extract via ion-exchange resin, solvent extraction, or electrolytic deposition onto a liquid-gallium cathode (ICSOBA, Selective Extraction of Gallium from Bayer Liquor; summary of Bayer process gallium recovery). Crude gallium recovered this way is only 97–99.9% pure and must be further refined by acid washing and fractional crystallization to reach the six-nines (99.9999%) purity required for semiconductor-grade material (Techniques de l'Ingénieur, Gallium Metallurgy). Because gallium extraction requires bolting a dedicated ion-exchange or electrolysis circuit onto an existing, unrelated alumina refinery, the decision to recover gallium at all is a discretionary capital choice for the refinery's owner — one most Western alumina producers have historically declined to make once Chinese material undercut them on price.

2. Chalco, Rusal and Rio Tinto Alcan: the world's biggest alumina refiners mostly do not produce gallium

China's own primary gallium output is concentrated among a handful of specialist chemical producers — Aluminum Corporation of China Ltd. (Chalco), Beijing Jia Semi-Conductor Material Co., China Crystal Technologies, East Hope Mianchi Gallium Industry, and Zhuhai Fangyuan — that operate gallium-recovery circuits alongside China's vast alumina refining base (Indian Bureau of Mines, Gallium chapter). By contrast, the world's other alumina majors have largely stayed out of gallium: Rio Tinto Alcan's Canadian and Australian alumina refineries did not recover gallium at all until the 2025 Sorel-Tracy demonstration (see Section 3), and Rusal — despite operating major alumina refineries at Aughinish (Ireland), Kübal (Sweden), and across Russia, Guinea and Jamaica — lists gallium metal at 99.99% and 99.999% purity among its product range from Russian facilities, but Western sanctions imposed after 2022 have cut off roughly 40% of Rusal's alumina feedstock (following Australia's alumina export ban and the loss of its Nikolaev, Ukraine refinery) and constrained its ability to expand gallium output for non-Russian buyers (Rusal, product range; Carnegie Endowment, Jul 2024). Alcoa, the largest Western alumina refiner, has only just begun a pilot gallium-recovery project with Japan Australia Gallium Associates (a Sojitz-Japanese government joint venture) at its Wagerup refinery in Western Australia, processing up to 10% of the refinery's liquor stream through a co-located ion-exchange plant — the first dedicated Western gallium plant built at an operating alumina refinery in a generation (Alcoa, Gallium Project Factsheet).

3. Germany's Ingal Stade and the Rusal ownership legacy

Germany's only historical primary gallium producer of scale, Ingal Stade GmbH, operated a gallium-extraction plant co-located with the aluminium industry at Stade, near Hamburg — a facility that for a period fell under Russian ownership as Rusal expanded its European downstream footprint before Western sanctions reshaped ownership structures across Rusal's international asset base (North Data, Ingal Stade GmbH corporate record). Germany's continued prominence in gallium trade statistics — a 1,111% rise in its share of U.S. gallium imports between 2022 and 2024 — is now driven primarily by recycling of semiconductor-manufacturing scrap rather than by Ingal-style primary Bayer-liquor extraction, per the Stimson Center's 2025 analysis of the German trade data referenced in Section 5 of this deep-dive (Stimson Center, Mar 2025).

4. Nyrstar Auby (France) and Clarksville (Tennessee): zinc smelting as the other byproduct route

The secondary byproduct pathway runs through zinc smelting: sphalerite (zinc sulfide) ore is roasted to zinc oxide and leached with sulfuric acid, and gallium reports to impurity fractions that can be separated from the leach solution (gallium/germanium byproduct feedstock analysis, 2023). Nyrstar's Auby, France zinc smelter — part of the same pan-European Nyrstar network as the Clarksville, Tennessee facility discussed in Section 3 — was placed on care-and-maintenance as early as December 2021 amid a European energy-cost crisis that made electricity-intensive zinc smelting uneconomic, with repeat idling announcements through 2022; Nyrstar has since explored restarting germanium and gallium extraction at its remaining European zinc assets even as full smelter operations at some sites have been slow to resume, underscoring how energy costs — not gallium economics — can determine whether a byproduct stream exists at all (Nyrstar press release, Auby care and maintenance; Nyrstar press release, Dec 2021). Clarksville, by contrast, was reactivated specifically as a gallium/germanium play once China's 2023 export controls created a structural Western price premium, illustrating that byproduct gallium capacity switches on and off based on trade policy and energy prices in the host industry, not gallium fundamentals alone (Clarksville Now, Sep 2023).

1. GaN power semiconductors: Wolfspeed, EPC and Navitas race to displace silicon and challenge SiC

GaN's wide bandgap (3.4 eV versus silicon's 1.1 eV) lets it switch at 1–10 MHz with far lower losses than silicon, shrinking passive components and enabling smaller, lighter power converters for EV onboard chargers, DC-DC converters, 48V AI-data-center power architectures, and fast consumer chargers (Navitas Semiconductor, SiC Evolution and GaN Revolution white paper). Navitas Semiconductor has partnered with Taiwan's Powerchip Semiconductor Manufacturing Corp to move GaN-on-silicon production from 150mm to 200mm wafers, targeting higher-volume 48V infrastructure for hyperscale AI data centers and EVs, with 100V-class devices beginning production in H1 2026 (Semiconductor Today, Jul 2025). EPC (Efficient Power Conversion) and GaN Systems have driven commercial e-mode GaN device costs down from over $10/amp in 2018 to under $2/amp by 2025 through high-volume consumer charger and automotive qualification programs (Quest Journals, SiC and GaN in EV charging systems). Wolfspeed, historically a silicon-carbide specialist, also supplies GaN-on-SiC power amplifiers for 5G base-station infrastructure to Ericsson and Nokia from its Durham, North Carolina fabs — making its Chapter 11 restructuring a direct supply-security concern for Western GaN-on-SiC availability (SemiconductorX, 5G/6G Wireless Semiconductor Supply Chain analysis).

2. GaAs RF: Skyworks, Qorvo and Broadcom anchor the smartphone and infrastructure front-end market

Gallium arsenide remains the incumbent semiconductor for radio-frequency power amplifiers in smartphone front-end modules, where Qorvo (dominant QPM-series RFFE modules) and Skyworks (SKY-series PA and RFFE modules, with an Osaka GaAs fab joint venture with Panasonic) supply the large majority of 5G handset PA content, alongside Broadcom's AFEM-series front-end modules (SemiconductorX, 5G/6G Wireless Semiconductor Supply Chain analysis). Skyworks and Qorvo announced plans in October 2025 to combine into a $22 billion U.S.-based RF leader, a deal expected to close in early 2027 subject to regulatory approval — consolidating two of the three largest Western GaAs RF suppliers into a single entity at the same time gallium feedstock costs are rising (Qorvo newsroom, 28 Oct 2025). Taiwan's WIN Semiconductors remains the dominant merchant GaAs foundry supplying this ecosystem, meaning GaAs capacity additions move at foundry-investment speed rather than commercial-silicon speed (SemiconductorX).

3. Substitution status: SiC vs. GaN, Si-LDMOS vs. GaAs — partial and voltage-dependent

USGS identifies specific, documented substitution pathways for gallium-based semiconductors, but each is partial rather than wholesale. Silicon-based CMOS power amplifiers already compete with GaAs in mid-tier 3G handsets; indium phosphide can substitute for GaAs infrared laser diodes at specific wavelengths; silicon-germanium is replacing GaAs in some heterojunction bipolar transistors; and silicon remains GaAs's principal competitor in solar cells (USGS MCS 2026). At the device-architecture level, silicon carbide (SiC) and GaN divide the wide-bandgap power market by voltage rather than fully substituting for one another: SiC dominates above roughly 650–900V (EV traction inverters, DC fast chargers, solar string inverters, rail), while GaN leads in the sub-650V, high-frequency segment (onboard chargers, 48V data-center power, USB-C fast chargers); "vertical GaN" devices that could push GaN into SiC's voltage territory remain in development at firms like VisIC and Transphorm, with commercial qualification unlikely before 2028–2030 (Cosolvic, SiC vs GaN Decision Framework, May 2026). Crucially, USGS notes that in many defense-related applications — the radar and missile-defense uses detailed in Section 4 — no effective substitute for GaAs or GaN currently exists, meaning the substitution options available in commercial markets do not apply to the Pentagon's highest-priority gallium demand (USGS MCS 2026).

4. Recycling: GaAs scrap loops close 27–47% of manufacturing waste, but end-of-life recovery is near zero

USGS reports that gallium recycling is confined entirely to "new scrap" — offcuts and reject material generated during GaAs wafer and device manufacturing — with "old scrap" (recovery from discarded end-of-life products such as LEDs or solar panels) at effectively zero, because the gallium content per unit is too small relative to disassembly cost to justify recovery (USGS MCS 2026). Neo Performance Materials (Peterborough, Ontario, and a gallium trichloride plant in Quapaw, Oklahoma) is the leading Western recycler, purchasing low-grade primary gallium and new scrap from GaAs ingot and wafer manufacturing and refining it up to 8N (99.999999%) purity; Neo closed a second U.S. recycling facility in Blanding, Utah in 2020, consolidating capacity at Peterborough (Neo Performance Materials, Gallium Products; USGS 2021 Minerals Yearbook, gallium). Independent estimates suggest specialist recyclers recover only 27–47% of available new-scrap gallium, leaving a meaningful volume of manufacturing waste unrecovered (GalliumPrice.com, Gallium Supply Chain analysis, 2026). Academic recycling research has advanced rapidly since the 2023 controls: a 2025 study published hydrothermal and triiodide ionic-liquid leaching methods that recover 94–99% of gallium and arsenic from scrapped GaAs integrated circuits at high purity without hazardous cyanide reagents, with one method estimated to yield roughly $33,600 in recovered-material value per kilogram of waste GaAs processed (Royal Society of Chemistry, Green Chemistry, Mar 2025; ACS Sustainable Chemistry & Engineering, GaAs IC recycling). On the policy side, the U.S. Department of Energy's TRACE-Ga program ($6 million, 2025) targets a one-tonne-per-year prototype gallium recovery facility from industrial waste streams, while in South Korea, Korea Zinc announced plans in early 2026 to invest roughly 56 billion won (~$40 million) by 2027 to install a gallium recovery process at its Onsan zinc smelter — explicitly citing gallium as "the first item subject to China's export controls" as the strategic rationale (GalliumPrice.com, DOE TRACE-Ga program; Asia Business Daily, 6 Feb 2026).