| abstract |
The present invention provides a negative thermal expansion material made of zirconium tungstate phosphate having various thermal expansion coefficients, and an industrially advantageous production method thereof. The negative thermal expansion is made of zirconium phosphate tungstate containing Al atoms and has a thermal expansion coefficient of -2.0 × 10 −6 to −3.3 × 10 −6 / K. Wood. [Selection diagram] Fig. 1 |