Green Critical Minerals’ VHD Graphite Technology Breakthrough Revolutionises Thermal Management

Record-Breaking Thermal Performance Positions Company at Forefront of AI Cooling Solutions

Green Critical Minerals Ltd (GCM) has achieved a significant technological breakthrough with its Very High Density (VHD) Graphite technology, delivering record-breaking density and thermal performance that substantially outperforms traditional thermal management materials. The company’s latest quarterly results reveal impressive progress in commercialisation efforts, with the successful commissioning of its pilot plant and production of first prototype blocks well ahead of schedule.

Breakthrough Performance Shatters Industry Benchmarks

The standout achievement this quarter was GCM’s record-breaking density results from its VHD Graphite blocks. The company achieved:

• • Peak density of 2,071 kg/m³ – the highest ever recorded for VHD technology

• • Average density of 2,011 kg/m³ across all test samples

• • Density levels exceeding industry standards for nuclear graphite (1,700-1,900 kg/m³) and electrode graphite (1,550-1,800 kg/m³)

Perhaps more significantly, testing confirmed exceptional thermal performance with:

• • Peak thermal diffusivity of 288 mm²/s – dramatically outperforming conventional cooling materials

• • 3x higher thermal diffusivity than aluminium and standard graphite

• • 2.6x higher thermal diffusivity than copper

• • 25x directional advantage in heat dissipation, ensuring precise thermal management for targeted applications

These performance metrics position VHD Graphite as potentially the most effective thermal management material available for next-generation electronics, particularly in AI servers, data centres, and high-performance computing applications.

Understanding Thermal Diffusivity: Why It Matters for AI and Computing

Thermal diffusivity measures how quickly heat spreads through a material – a critical property for cooling high-power electronics like AI servers and data centres. Unlike thermal conductivity, which indicates how easily molecules transfer heat, thermal diffusivity reveals how rapidly heat moves through an entire object.

This property is particularly vital in modern computing, where heat management directly impacts performance and reliability. Materials with higher thermal diffusivity can potentially eliminate hotspots more effectively and efficiently direct heat away from sensitive components.

The breakthrough in Green Critical Minerals VHD Graphite technology achieves this through its exceptional anisotropic properties – meaning heat flows directionally rather than uniformly. With a confirmed peak anisotropy degree of 24.9, the material can precisely channel heat in targeted directions, making it ideal for specialised cooling applications where controlling heat flow patterns is crucial.

Commercial Progress and Strategic Partnerships Accelerating

The company’s commercialisation efforts gained significant momentum during the quarter with:

• • Early commissioning of Line 1 at the pilot plant, enabling production ahead of schedule

• • Successful production of first prototype blocks, yielding 12 test samples that exceeded industry benchmarks without optimisation

• • Appointment of Chris Whiteley as Head of Sales and Marketing to drive customer engagement and revenue growth

• • First samples issued to a prospective customer and signing of a collaboration agreement with a leading, sustainability-focused data centre company

The pilot plant has been designed to support parallel development of two distinct product lines:

1. 1. Smaller VHD blocks (Line 1) – specifically designed for heat sinks in high-performance computing, gaming computers, supercomputers, AI servers and data centres

1. 1. Larger VHD blocks (Line 2) – tailored for electrical discharge machining, traditional graphite markets, and solar-thermal energy storage systems

Progress Across Mineral Asset Portfolio

Beyond its VHD technology advancements, GCM continues to develop its diverse portfolio of critical mineral assets:

• • McIntosh Graphite Project: Completed Stage 3 earn-in requirements, securing an 80% interest in the project after spending over $4 million on exploration and development. Pre-feasibility study nearing completion, expected in early Q2 2025.

• • Torrington Minerals Project: Advanced review of high-value mullite fibre production potential from topaz concentrates. Research indicates potential to transform low-value topaz feedstock into high-value single crystal mullite fibres for Metal Matrix Composites and Ceramic Matrix Composites, with predicted values of approximately US$11,000 per kilogram.

• • Red Fox Resources Investment: GCM holds a 30.4% interest in Red Fox Resources, which expanded its exploration footprint with five additional Exploration Permits in the Selwyn district. Evolution Mining completed a nine-hole diamond drilling program at the Cloncurry North Project, where it holds an 80% earn-in right.

Strong Financial Position and Strategic Interest

As of 31 March 2025, GCM maintained a cash balance of $1.32 million. The company reported it is attracting strong interest from multiple strategic parties, strengthening confidence in securing partnerships and funding needed to advance from commercialisation into production.

GCM has also registered an R&D application for 2024, expected to generate a refund exceeding $100,000 in the coming quarter.

Why Investors Should Follow Green Critical Minerals

GCM has positioned itself at the intersection of two high-growth markets: critical minerals and advanced materials for the AI and high-performance computing revolution. The breakthrough in Green Critical Minerals VHD Graphite technology represents a potential game-changer in thermal management for next-generation electronics, with several compelling investment considerations:

1. 1. Record-breaking performance metrics that significantly outperform existing market solutions

1. 1. Direct application in rapidly growing markets including AI, data centres and high-performance computing

1. 1. Early customer engagement with a data centre collaboration already secured

1. 1. Diversified portfolio of critical mineral assets providing multiple potential value streams

1. 1. Scalable manufacturing process demonstrated through consistent production results

The breakthrough in Green Critical Minerals VHD Graphite technology and the company’s rapid progress from technology development to pilot production and customer engagement demonstrates execution capability, while strategic interest from multiple parties suggests potential pathways to accelerated commercialisation and production.

With thermal management increasingly becoming a bottleneck in computing performance, particularly for AI applications, GCM’s breakthrough in heat dissipation efficiency positions it to potentially capture significant value in a rapidly expanding market. Furthermore, investors interested in precious metals might also consider gold and silver investments as a complementary option to critical minerals in their portfolio.

Technical Advantage in Detail: Understanding the Heat Management Revolution

The exceptional thermal properties of the VHD Graphite technology are particularly notable when examining weight efficiency. At 14.3% weight efficiency, heat diffuses through VHD Graphite 12x faster per unit weight than copper (1.2%), potentially offering a next-generation lightweight solution for applications where both thermal performance and weight considerations are critical.

This weight-to-performance ratio could prove particularly valuable in applications such as:

• • Advanced electronics cooling where space and weight constraints are significant

• • Mobile computing devices requiring efficient thermal management in compact form factors

• • Aerospace and defence applications where weight reduction delivers substantial benefits

While the global lithium market faces uncertainty, graphite technologies continue to show strong potential. The table below illustrates the comparative thermal diffusivity performance of VHD Graphite against traditional materials:

The consistency of results across test samples demonstrates the repeatability of the manufacturing process, with the company reporting an average density of 2,011 kg/m³ with minimal variation between samples. This consistency is essential for commercial applications where performance predictability is required.

In addition, given recent developments in the Chinese graphite market dynamics, GCM’s technological advancement provides a potential alternative supply source for high-performance graphite materials. Moreover, the potential of graphene in AI and electronics further highlights the growing importance of carbon-based materials in next-generation technologies.

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