The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 23, 2017
Filed:
Jan. 20, 2016
Ngk Insulators, Ltd., Aichi-prefecture, JP;
NGK INSULATORS, LTD., Aichi-Prefecture, JP;
Abstract
A ceramic material has a characteristic length Lof a micro-structure thereof that satisfies 0.1 L≦L≦100 L, and has thermal conductivity that monotonously increases from room temperature to 100° C., where Ldenotes apparent mean free path of phonons at room temperature, and is defined as L=(3×thermal conductivity)/(heat capacity×speed of sound). The characteristic length Lof the micro-structure is an interval between particles of different type of material when the ceramic material includes a composite material in which the different type of material is dispersed in a base material, is an interval between one pore and another pore when the ceramic material includes a porous body, and is the crystalline particle size (interval between one grain boundary and another grain boundary) when the ceramic material includes a polycrystalline body.