Management Team

Hongju Chang CEO Admat

Hongju Chang, CEO

Hongju founded Admat in 1997. He has over 30 years of valuable experience working with tantalum and niobium metals and has made exceptional contributions to the technologies used in this industry.

Prior to starting Admat Inc., Hongju was the R&D Manager at Cabot Supermetals in Boyertown, PA. In this role, he developed technologies and Prior to Cabot, Hongju developed pilot processes at Smith Kline Pharmaceuticals. His experience is backed up with a PhD. in Chemical Engineering.processes that yielded four US Patents and many publications. These included two patents defining processes for improved control on size distribution and one improving performance of high capacitance tantalum powder.

With his expertise in refractory metals, Admat has distinct advantages in providing the best value to our customers.

Eric von Spreckelsen Director of Sales and Operations Admat Tantalum Niobium Tungsten-Molybdenum-Metals-and-Machined-parts

Eric von Spreckelsen, Director of Sales & Operations

Since 1998, Eric has had responsibility for the sales of refractory metals throughout North America, Europe and Asia.

He has extensive experience working with such industries as defense, aerospace, semiconductor, superconductor, medical, and chemical processing. Furthermore, over the past 20+ years, Eric has made significant contributions to the tantalum industry. He has strengthened product quality, reduced cycle times, shortened product lead times, developed new product forms and alloys and even patented new technology to improve the grain structure in tantalum for semiconductor applications.

Since joining Admat in 2009, Eric has been instrumental in expanding Admat’s product portfolio to include machined parts, tantalum coilsets, explosively bonded tantalum and new metals such as tungsten, molybdenum and titanium.

Prior to his career with refractory metals, Eric sold electrical industrial process heating systems to manufacturers in the plastic, metal, defense, and food industries.

He holds a BS in Business Administration with a specialization in Marketing and Management, from Thomas A Edison University in Trenton, New Jersey.

Allen Chang Admat Inc

Allen Chang, Engineering Manager

Allen joined Admat in 2006. He has a B.S. in Mechanical Engineering from Villanova University and also studied at Tsinghua University in Beijing. Admat benefits from Allen’s engineering background and his AutoCAD experience.

If your business requires custom fabricated or engineered products, Allen will oversee the product design and prototype phase to ensure that all requirements are met. Additionally Allen is responsible for our incoming product quality control.

He ensures that products meet the required specifications and samples chemistry using third party labs.

Bob Balliett Admat Inc

Bob Balliett, Technical Metallurgical Consultant

Mr. Robert W. Balliett is a consultant providing technical support to the metals industry. He is an experienced operations and technology manager with extensive experience in product and process development. Mr. Balliett has expertise in the refractory metals including powder fabrication, vacuum metallurgy, vacuum melting, casting, forging, extrusion, rolling, lubrication, fabrication, and wire drawing. He has metallurgical operations experience with a variety of specialty high value metals including aluminum, copper, lead, zinc, niobium, tantalum, molybdenum and the precious metals serving the microelectronic component, semiconductor, chemicals, medical equipment, military, coatings, power, and aerospace industries.