材料导报
材料導報
재료도보
MATERIALS REVIEW
2009年
22期
9-11
,共3页
铌酸钾钠-铌酸锂陶瓷%锰掺杂%压电性能%机械品质因数
鈮痠鉀鈉-鈮痠鋰陶瓷%錳摻雜%壓電性能%機械品質因數
니산갑납-니산리도자%맹참잡%압전성능%궤계품질인수
(K_(0.5)Na_(0.5))NbO_3-LiNbO_3 ceramics%manganese doping%piezoelectric properties%mechanical quality factor
采用传统陶瓷制备工艺制备了(K_(0.5)Na_(0.5))NbO_3-LiNbO_3-xMnO_2压电陶瓷,分析了陶瓷样品的微观组织结构.实验结果表明,随MnO_2掺杂量的增多,陶瓷由四方相转变为正交相,晶粒的均匀性下降并生成K_3LiNb_6O_(17)相.研究了MnO_2不同掺杂量对陶瓷压电性能的影响.结果表明,随锰掺杂量的增加,材料逐渐变"硬",机电耦合系数k_p和压电常数d_(33)逐渐减小,同时Q_m逐渐增大;当MnO_2含量为0.8%(质量分数)时,陶瓷的机械品质因数达到最大,此时陶瓷的压电性能为:k_p=0.34,k_t=0.43,d_(33)=110pC/N,Q_m=401.3.
採用傳統陶瓷製備工藝製備瞭(K_(0.5)Na_(0.5))NbO_3-LiNbO_3-xMnO_2壓電陶瓷,分析瞭陶瓷樣品的微觀組織結構.實驗結果錶明,隨MnO_2摻雜量的增多,陶瓷由四方相轉變為正交相,晶粒的均勻性下降併生成K_3LiNb_6O_(17)相.研究瞭MnO_2不同摻雜量對陶瓷壓電性能的影響.結果錶明,隨錳摻雜量的增加,材料逐漸變"硬",機電耦閤繫數k_p和壓電常數d_(33)逐漸減小,同時Q_m逐漸增大;噹MnO_2含量為0.8%(質量分數)時,陶瓷的機械品質因數達到最大,此時陶瓷的壓電性能為:k_p=0.34,k_t=0.43,d_(33)=110pC/N,Q_m=401.3.
채용전통도자제비공예제비료(K_(0.5)Na_(0.5))NbO_3-LiNbO_3-xMnO_2압전도자,분석료도자양품적미관조직결구.실험결과표명,수MnO_2참잡량적증다,도자유사방상전변위정교상,정립적균균성하강병생성K_3LiNb_6O_(17)상.연구료MnO_2불동참잡량대도자압전성능적영향.결과표명,수맹참잡량적증가,재료축점변"경",궤전우합계수k_p화압전상수d_(33)축점감소,동시Q_m축점증대;당MnO_2함량위0.8%(질량분수)시,도자적궤계품질인수체도최대,차시도자적압전성능위:k_p=0.34,k_t=0.43,d_(33)=110pC/N,Q_m=401.3.
Piezoelectric ceramics (K_(0.5) Na_(0.5))NbO_3-LiNbO_3-xMnO_2 are prepared by traditional ceramic process. The phase structure is analyzed. The results show that the phase structure changes from tetragonal phase to orthogonal phase with the content of MnO_2 increasing. The new phase K_3LiNb_6O_(17) is formed. The effect of MnO_2 doping on the piezoelectric properties is investigated. When the content of MnO_2 increases, the mechanical coupling factor k_p and piezoelectric constant d_(33) decrease, while the mechanical quality factor Q_m increases. When the content of MnO_2 is 0.8%, the piezoelectric properties of the ceramic are as follows: k_p=0.34, k_t=0.43, d_(33) =110pC/N, Q_m=401.3, respectively.