Lead free piezoelectric ceramics of potassium sodium niobate and preparation thereof
Title:
Lead free piezoelectric ceramics of potassium sodium niobate and preparation thereof
Application Number:
200410068962
Application Date:
2004/07/15
Announcement Date:
2005/07/27
Pub. Date:
Publication Number:
1644562
Announcement Number:
Grant Date:
Granted Pub. Date:
ApplicationType:
Invention
State/Country:
11[China|beijing]
IPC:
C04B 35/495, H01L 41/187, C04B 35/622
Applicant(s):
Tsinghua Univ.
Inventor(s):
Li Jingfeng, Zhang Boping, Zhang Limin
Key Words:
Lead free, piezoelectric ceramics, potassium sodium niobate,preparation
Abstract:
A niobic acid potassium sodium system lead-free piezoelectric ceramic and its production are disclosed. The components of the niobic acid potassium sodium system lead-free piezoelectric ceramic are (1-n)KxNa1-xNbO3.nMH, it is prepared by SPS process. The production is carried out by grinding mixing raw materials, calcining synthesizing niobate, using SPS process for the obtained powdery material, annealing treating under oxygen atmosphere, and obtaining piezoelectric/ferroelectric ceramic materials. Its advantages include lead-free composition, good piezoelectric performance, low calcining temperature, short calcining time and fine tissue.
Claim:
Priority:
PCT:
LegalStatus:

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