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Contact Us GLOBAL Search this site 日本語 中文 Corporate Overview Products and Services Research and Development Sustainability News Corporate Overview Message from the Management Philosophy Quick Guide to JX Metals Business Segments Corporate Data Organization and Executive Officers Corporate History Operating Sites and Group Companies Long-Term Vision and Medium-Term Management Plan Purchasing Information Products and Services Search by Category Copper Alloys and Special Steel Products Copper Foil Sputtering Targets Compound Semiconductors and Crystal Materials Metal and Compound Powders Special Ceramic Powders High Purity Metals Surface Treatment Agents Upinorg (high-purity copper sulfate) Electroless UBM Plating Service MoSi2 Heater Shielding Materials Nonferrous Metals and Chemical Products Products Under Development Search by Keyword Semiconductors and Sensors Circuit Boards Assembly Displays Batteries and Energy Additive Manufacturing Connectors Magnetic Devices Electromagnetic Shielding Communications Optics Camera Modules Piezoelectricity Thermal Control Research and Development Our Core Technologies Contributing to Societal Growth and Innovation Initiatives for Co-creation Collaboration in the Group SQUARE LAB Sustainability Sustainability Report Toward Net-Zero CO2 Emissions Activities in Environmental Conservation CSR Purchasing News News Release Trade Fairs and Exhibitions MENU HOME Products and Services Special Ceramic Powders Negative Thermal Expansion Material ZrW2O8 for Thermal Stress relaxation Special Ceramic Powders Under DevelopmentNegative Thermal Expansion Material ZrW2O8 for Thermal Stress relaxation We are developing ZrW2O8 which is known as one of negative thermal expansion materials. This material is expected to help to improve reliability of heat-generating parts such as power devices or electronic devices used in environments subject to temperature variability by alleviating thermal stress The features of ZrW2O8 are as follows. Thermal expansion of the base material can be controlled by creating composite materials with ZrW2O8. It can be mixed with both organic and inorganic substances. Negative thermal expansion occurs across a wide temperature range, making use of ZrW2O8 possible at high temperatures. Main Properties of ZrW2O8 (Reference Values) Coefficient of thermal expansion (ppm/K)*1 &＃945; phase (up to 155&＃8451;) -9 &＃945;&＃8594;&＃946; phase change(155 - 180&＃8451;) - &＃946; phase (180&＃8451; and above) -4 Density (g/cm3)*2 5.07 Electrical resistivity (&＃937;/cm)*3 108 - 1012 Thermal Conductivity (W/mK)*4 0.56 1JX Metals measured values (measured with a green compact) 2Literature data (G. Wu et al., Scripta Mater., 96 (2015), 29-32) 3JX Metals measured values (measured with a green compact) 4Literature data (C.A. Kennedy, Solid State Commun.,134 (2005), 271) ZrW2O8 negative thermal expansion property measurement results*5 5TMA measurement with a green compact Effect of ZrW2O8(Example of Use with Epoxy Resin) TMA measurement results Contact Information From the Web Contact Form Inquiries accepted 24 hours a day Products and Services Products and Services TOP Search by Category Copper Alloys and Special Steel Products Copper Alloys and Special Steel Products TOP Copper Alloy Strip Copper Alloy Strip TOP Search for products Hyper Phosphor Bronze Hyper Phosphor Bronze TOP C5210 (HP) C5240 (HP) Titanium Copper Alloy Titanium Copper Alloy TOP C1990 C1990HP C1990HC NKT322 Corson Alloys Corson Alloys TOP C7025 NKC164 NKC164E NKC4419 NKC4820 NKC286 NKC286S NKC1816 NKC388 Phosphor Bronze Nickel Silver High Conductivity Alloys High Conductivity Alloys TOP NKE010 NKE012 Copper Alloy Foil Copper Alloy Foil TOP HS1200 Sn-Cu-PET foil for electromagnetic shielding C1990HP Foil (Titanium Copper Foil) Special Steel Products Special Steel Products TOP List of Properties Copper Foil Copper Foil TOP Treated Rolled Copper Foil Treated Rolled Copper Foil TOP HA and HA-V2 foil Surface Treatment JXEFL Series Electro-Deposited Copper Foil for Flexible Printed Circuits Copper Foil for Rigid Circuit Boards Sputtering Targets Sputtering Targets TOP What Is Sputtering? 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