Patents by Inventor Yongke Yan

Yongke Yan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20230145627
    Abstract: Embodiments relate to a piezoelectric ceramic and methods of making the same that is suitable for use as a high-power piezoelectric ceramic, and in particular a piezoelectric ceramic that exhibits both good hard properties and good soft properties. Embodiments involve generating the piezoelectric ceramic via the combination of chemical modification/doping and/or a texturing method so that the piezoelectric material exhibits a large figure of merit, as well as other hard and soft properties. The chemical modification involves Cu and Mn doping a piezoelectric material composition having a relaxor-lead titanate based ferroelectric structure. The texturing involves templated grain growth (TGG) texturing using a BaTiO3 (BT) template.
    Type: Application
    Filed: July 1, 2021
    Publication date: May 11, 2023
    Inventors: Haoyang Leng, Yongke Yan, Shashank Priya
  • Patent number: 10910551
    Abstract: A piezoelectric material includes a first material layer including a polycrystalline lead zinc niobate-lead zirconate titanate material arranged in a 001 crystal direction; and a second material layer including a mono-crystalline material having a 001 crystal face, wherein the lead zinc niobate-lead zirconate titanate and the mono-crystalline material are different. Also a piezoelectric device including the piezoelectric material.
    Type: Grant
    Filed: November 6, 2017
    Date of Patent: February 2, 2021
    Assignees: SAMSUNG ELECTRONICS CO., LTD., VIRGINIA TECH INTELLECTUAL PROPERTIES, INC.
    Inventors: Jin S. Heo, Kyunghoon Cho, Shashank Priya, Yongke Yan
  • Patent number: 10224476
    Abstract: Textured PMN-PZT fabricated by templated grain growth (TGG) method has a piezoelectric coefficient (d) of 3 to 5 times that of its random counterpart. By combining this TGG method with low-temperature co-firing ceramics (LTCC) techniques, co-fired multilayer textured piezoelectric ceramic materials with inner electrodes were produced at a temperature as low as 925° C., which silver could be used. Trilayer PMN-PZT ceramics prepared by this method show a strain increase of 2.5 times, a driving voltage decrease of 3 times, and an equivalent piezoelectric coefficient (d*) improvement of 10 to 15 times that of conventional random ceramic counterparts. Further, a co-fired magnetostrictive/piezoelectric/magnetostrictive laminate structure with silver inner electrode was also synthesized. The integration of textured piezoelectric microstructure with the cost-effective low-temperature co-fired layered structure achieves strong magnetoelectric coupling.
    Type: Grant
    Filed: February 1, 2013
    Date of Patent: March 5, 2019
    Assignee: VIRGINIA TECH INTELLECTUAL PROPERTIES, INC.
    Inventors: Yongke Yan, Shashank Priya
  • Publication number: 20140375174
    Abstract: Textured PMN-PZT fabricated by templated grain growth (TGG) method has a piezoelectric coefficient (d) of 3 to 5 times that of its random counterpart. By combining this TGG method with low-temperature co-firing ceramics (LTCC) techniques, co-fired multilayer textured piezoelectric ceramic materials with inner electrodes were produced at a temperature as low as 925° C., which silver could be used. Trilayer PMN-PZT ceramics prepared by this method show a strain increase of 2.5 times, a driving voltage decrease of 3 times, and an equivalent piezoelectric coefficient (d*) improvement of 10 to 15 times that of conventional random ceramic counterparts. Further, a co-fired magnetostrictive/piezoelectric/magnetostrictive laminate structure with silver inner electrode was also synthesized. The integration of textured piezoelectric microstructure with the cost-effective low-temperature co-fired layered structure achieves strong magnetoelectric coupling.
    Type: Application
    Filed: February 1, 2013
    Publication date: December 25, 2014
    Applicant: VIRGINIA TECH INTELLECTUAL PROPERTIES, INC.
    Inventors: Yongke Yan, Shashank Priya
  • Publication number: 20140295138
    Abstract: A textured PMN-PZT ceramic is created using templated grain growth to align seed crystals in a ceramic matrix powder by tape-casting process. Heat treatment then results in the nucleation and growth of matrix crystals on aligned templates. The resulting textured PMN-PZT ceramic has high longitudinal piezoelectric coefficient and a high piezoelectric voltage coefficient. In another embodiment, a textured PMN-PT ceramic has a volume fraction of the templates no greater than 1%. The utility of this invention includes both its exceptional piezoelectric properties as well as the utilization of an economical manufacturing process that is widely used in the multi-layer ceramic capacitor industry.
    Type: Application
    Filed: October 12, 2012
    Publication date: October 2, 2014
    Applicant: Virginia Tech Intellectual Properties, Inc.
    Inventors: Yongke Yan, Shashank Priya