一種應用無鉛鐵電材料的片式微制冷器
The invention relates to a sheet-type micro refrigerator applying a lead-free ferroelectric material. The micro refrigerator comprises a multi-layer structure which is composed of a ferroelectric dialectric layer and a metal electrode layer alternatively; the ferroelectric dielectric layer is made of the lead-free ferroelectric material; periodic square wave signals with alternative changes of working electric fields for controlling the ferroelectric dialectric layer are applied on the metal electrode layer, thus the changes of the working electric fields of the ferroelectric dialectric layerare higher than 100kv/cm. A curtain coating technology is adopted to manufacture the multi-layer thick film structure for the sheet-type micro refrigerator provided by the invention, the high electrocaloric effect is realized through a superelevation electric field condition, and the sheet-type micro refrigerator has the following beneficial effects: 1) environmental protection: a lead-free ferroelectric ceramic is adopted as a working medium, which correponds to the environment protection requirement; 2) high efficiency: the actual refrigerating amount can reach more than 2J/g; and 3) the structure is simple, the production technology is mature, and the cost is low.
Inventor: BAI, Yang | SHI, San-qiang | ZHENG, Guang-ping
Priority Number: CN102192614B
IPC Current: F25B002102
Assignee Applicant: The Hong Kong University of Science and Technology
Title: Sheet-type micro refrigerator applying lead-free ferroelectric material | A kind of application lead-free ferroelectric material micro-refrigerator
Usefulness: Sheet-type micro refrigerator applying lead-free ferroelectric material | A kind of application lead-free ferroelectric material micro-refrigerator
Novelty: Chip micro-cooler, has electrode layers provided with periodic square wave signal for controlling alternant variation of working electric field of medium layers such that variation of electric field is greater than specified value
電子
半導體
BAI Yang
ZHENG Guagnping
SHI Sanqiang
中國內地
