Alexandra O Pecharsky

Title: Innovations of Alexandra O Pecharsky

Introduction

Alexandra O Pecharsky is a prominent inventor based in Ames, Iowa. She has made significant contributions to the field of materials science, particularly in the development of active magnetic refrigerants. With a total of 3 patents, her work has garnered attention for its innovative approaches to magnetic materials.

Latest Patents

Pecharsky's latest patents include a method of making active magnetic refrigerant materials based on Gd-Si-Ge alloys. This invention describes an alloy made of heat-treated material represented by Gd(SiGe) where 0.47 ≤ x ≤ 0.56. It exhibits a magnetic entropy change (−ΔS) of at least 16 J/kg K, a magnetostriction of at least 2000 parts per million, and a magnetoresistance of at least 5 percent at a temperature of about 300K and below. The method also involves heat treating the material between 800 to 1600 degrees Celsius for a specified duration.

Another notable patent is the method of making active magnetic refrigerant, colossal magnetostriction, and giant magnetoresistive materials based on Gd-Si-Ge alloys. This method outlines the process of creating an active magnetic refrigerant represented by the Gd(SiGe) alloy for 0 ≤ x ≤ 1.0. It includes placing amounts of commercially pure Gd, Si, and Ge charge components in a crucible, heating the charge contents under subambient pressure to a melting temperature, and rapidly solidifying the alloy. The process aims to improve the magnetocaloric, magnetostrictive, and magnetoresistive properties of the material.

Career Highlights

Alexandra O Pecharsky is affiliated with the Iowa State University Research Foundation, Inc. Her work has been instrumental in advancing the understanding and application of magnetic materials in refrigeration technologies.

Collaborations

Pecharsky has collaborated with notable colleagues such as Karl A Gschneidner, Jr. and Vitalij K Pecharsky, contributing to the collective knowledge in the field of materials science.

Conclusion

Alexandra O Pecharsky's innovative work in the development of magnetic materials has positioned her as a key figure in the field. Her patents reflect a commitment to advancing technology and improving energy efficiency through innovative materials.