Indium (In)

Atomic number 49 · soft post-transition metal · zinc-smelter co-product

Why indium matters

Indium is the indispensable input to indium-tin-oxide (ITO) — the transparent conductive coating on every LCD panel, every capacitive touchscreen, every OLED display, and every CIGS thin-film photovoltaic module on Earth. ITO is the only commercial transparent conductor that combines >80% visible-light transmittance with sheet resistance below ~10 Ω/sq, and indium is the only economically viable atom that delivers the property — there is no chemically equivalent substitute for the display-panel use case. Roughly 70% of global indium consumption is ITO sputtering targets for the FPD-display industry, with the next largest uses being III-V semiconductor compounds (InP for high-speed photonics + 5G/6G mmWave amplifiers + LiDAR; InGaAs for SWIR detectors; InSb for thermal-IR imaging; InGaN for blue/green LEDs and laser diodes ~10%), CIGS thin-film solar PV (Cu-In-Ga-Se absorber layer ~5-7%), and soft solders / fusible alloys (low-melting Pb-free + cryogenic + optical-glass-to-metal sealing solders ~10%).

The supply chain in one paragraph

There is no primary indium mine. ~99% of global indium output is recovered as a co-product of zinc smelting from sphalerite (ZnS) concentrates that contain 50-2,000 ppm In as a trace impurity. A small secondary stream (~1%) comes from tin / lead / copper concentrate flue dusts. The economic threshold for In recovery is roughly $100/kg In — below this, smelters route the In residue to slag. World refinery production is ~880-960 t/yr (USGS MCS 2025, 2024 calendar year). China ~64%, Korea ~19%, Japan ~8%, Canada ~9%, Belgium / France / Russia / Peru combined ~5% of refinery output. Mining-stage geography mirrors zinc-concentrate output (CN ~32%, PE ~10%, AU ~9%, US ~7%, MX ~6%, BO ~6%, IN ~5%, KZ ~5%, RU ~4%) but the binding policy chokepoint is the refining stage: China extracts In from its own zinc smelters AND from imported concentrates, so the In-recovery cluster (Liuzhou Zinc, Zhuzhou Smelter, Huludao Zinc, Shaoguan Smelting) controls a much higher share than CN's mining position alone would suggest.

The 2024-2025 export-control regime

China MOFCOM included indium in the same GACC dual-use export-licence regime progressively tightened across 2023-2025:

• August 2023: germanium + gallium dual-use export controls
• December 2024: gallium + germanium + antimony + superhard

materials outright ban to the United States (MOFCOM Announcement 46)

• July 2024 / December 2024 / February 2025: graphite + indium +

bismuth + tellurium added to the dual-use export-licence list

For indium specifically, exports require case-by-case GACC approval since mid-2024 with US-end-user customers facing licence-denial on defence + dual-use applications. The EU + Japan + Korea path remains open but with elongated lead-times (8-16 weeks vs prior 2-4 weeks). This is the canonical "slow-burn export control" — unlike the December 2024 antimony total ban, the indium regime tightens incrementally without a single bilateral cutoff event, but the cumulative effect since late 2023 has been a doubling of spot price (~$170/kg → ~$340/kg 2023→2024) and a structural shift to non-Chinese secondary recycling.

Historical price trajectory

Indium's price history is unusually volatile because the demand side has been LCD-panel-cycle dominated for two decades:

• 2005-2007: $400-1,000/kg peak — the LCD-TV adoption wave drove

ITO demand 5x in three years; recycling infrastructure not yet built.

• 2010-2015: $400-700/kg sustained — first major recycling cycle

(ITO sputter-target reclaim now covers ~50-60% of "new" target demand) caused secondary supply to absorb the FPD-cycle pulse.

• 2015-2020: $150-220/kg structural floor — Chinese zinc-smelter

capacity expansion + mature ITO recycling infrastructure pushed price below the marginal recovery cost for some Western smelters; Teck Trail BC, Zinkindustrie Ruhr DE, Asarco TX/AZ partially curtailed In-recovery operations during this period.

• 2021-2023: $180-280/kg — gradual recovery on EV + 5G + photonics

demand pull combined with reduced Chinese zinc-smelter expansion.

• 2024-2025: $280-400/kg — China dual-use export-licence regime

+ III-V photonics + EUV-related photolithography indium-purge demand; structural shift to Western secondary supply.

Pricing remains bilateral / contracted (LME indium futures contract exists but trades thinly; physical price discovery happens via Argus / Fastmarkets / Asian Metal weekly assessments).

Critical-minerals-list status (universal)

• US: DOI Critical Minerals List 2018, retained 2022 + 2025

review; DPA §303 designated since 2020 for III-V semiconductor + defence IR-detector applications.

• EU CRMA 2024: Strategic + Critical (Annex II) — flagged for

ITO-display + CIGS-PV + III-V-semiconductor strategic dependency.

• Japan METI: 34-mineral stockpile list (since 2009); JOGMEC

maintains physical stockpile with target-coverage 60 days of national consumption.

• Korea KORES: 33-strategic-minerals list — Samsung Display + LG

Display ITO-target imports drive ~80% of Korean indium consumption.

• Australia: 2023 Critical Minerals List (added in 2022 Strategy).
• UK: 2023 Critical Minerals Refresh — flagged for III-V

semiconductor + photonics + defence imaging applications.

• Canada: 2021 Critical Minerals List — Teck Trail BC indium

recovery + Glencore CCR Quebec recovery as domestic supply anchors.

Western supply-chain alternatives

There are essentially three non-Chinese clusters of meaningful capacity:

1. Korea — LS Nikko Copper (Onsan smelter) ~165 t/yr indium recovery; supplies Samsung Display + LG Display ITO-target manufacturing in-country. Korean ITO-target capacity (Mitsui Mining Korea + LG Chem + DuPont) is the world's largest at ~50-55% of global ITO-target output, making Korea both the largest non-Chinese refiner and the largest non-Chinese ITO-fabrication cluster.

2. Japan — Dowa Mining + Mitsui Mining + Nyrstar JZ (Hannoki) ~70-80 t/yr combined; supplies JX Nippon Mining + Nikko Materials + Tosoh ITO-target manufacturing. Japan is the historic technology leader in high-purity ITO sputter-target manufacturing (>99.999% In-O-Sn purity required for high-resolution OLED + 8K displays).

3. Canada + Belgium + France — Teck Trail BC ~70 t/yr, Glencore CCR Montreal ~10 t/yr, Umicore Hoboken BE ~15 t/yr, Recylex / Nyrstar Auby FR ~5 t/yr. Aggregate ~100 t/yr is the European + North American floor; insufficient on its own to cover non-Asian demand but provides redundancy for defence + photonics + R&D applications.

US-specific exposure is acute: zero domestic primary indium recovery since 2017 (Indium Corporation NY operates as a downstream fabricator buying foreign refined In; Nyrstar Clarksville TN recovers very limited tonnage). USGS reports US 100% net-import-reliant since 2017; primary import sources are Korea (~40%), China (~25% pre- controls, falling), Japan (~15%), Canada (~10%), Taiwan (~5%).

German Mittelstand exposure

The German mid-market industrial exposure is concentrated in three segments:

• Heraeus (Hanau, family-owned) — global market leader in ITO

sputter-target manufacturing for OLED + LCD + automotive HUD displays; consumes ~60-100 t/yr indium across its target-fabrication + thin-film-coatings divisions. Heraeus has been actively building closed-loop ITO-target reclamation (~70% recycle rate from customer sputter-target spent material).

• Schott AG + PVA TePla — display-substrate glass and CIGS-PV

pilot-line equipment; indirect indium exposure via German solar + display equipment supply chains.

• Siemens Energy + Centrotherm + Singulus Technologies — CIGS

PV equipment manufacturers exporting turnkey production lines to Korean + Indian + Turkish + Saudi solar-manufacturing buildouts; CIGS thin-film economics are sensitive to indium price (the Cu-In-Ga-Se absorber layer is ~22% indium by mass).

• BASF + Lanxess + Evonik — specialty-chemicals exposure via

organometallic indium precursors (TMIn for III-V MOCVD epitaxy, used by AIXTRON Aachen MOCVD-tool customers worldwide).

The November 2024 BMWK + KfW critical-minerals-finance facility (€2.5bn) explicitly listed indium alongside germanium, gallium, and rare earths as eligible for state-loan-guarantee coverage on European-supplier offtake agreements.

What to watch 2025-2030

1. Korea + Japan capacity expansion — LS Nikko, Dowa, JX Nippon are adding incremental In-recovery capacity (~30-50 t/yr collectively 2025-2027) to absorb redirected non-Chinese demand. 2. Recycling intensification — closed-loop ITO target reclaim already covers ~50-60% of new target supply; pushing toward 75-80% would structurally cut primary demand by 15-20%. 3. AlZnO + carbon-nanotube transparent conductors — laboratory- stage substitutes for ITO in low-resolution touch panels; not commercial at >10% market share through 2030 due to ITO's sheet-resistance / transmittance superiority. 4. III-V photonics demand — InP wafer demand for 100G/400G/800G data-centre transceivers + 5G/6G mmWave + LiDAR is growing 12-18% CAGR; absolute tonnage is small (~50-80 t/yr) but the feedstock is technically demanding (>99.9999% purity, very few capable refineries globally). 5. CIGS-PV vs c-Si — CIGS thin-film holds <5% global PV market share and faces pressure from cheap c-Si modules; sustained CIGS share decline would soften indium demand 50-100 t/yr by 2030.

Sources: USGS Mineral Commodity Summaries 2025 (indium chapter); IEA Critical Minerals Outlook 2024; EU CRMA 2024 Annex II rationale documents; JOGMEC indium supply balance 2024; KORES 33-list 2023 documentation; Argus + Fastmarkets weekly indium price assessments 2020-2025; Heraeus annual report 2024; Reuters / Bloomberg reporting on Chinese MOFCOM dual-use export-licence regime 2023-2025.