Detail of "12196-68-8"

Reference

Sinterability and piezoelectric properties of (K,Na)NbO3 ceramics with novel sintering aid

Sinterability and piezoelectric properties of (K,Na)NbO3 ceramics with novel sintering aid. Matsubara, Masato; Yamaguchi, Toshiaki; Kikuta, Koichi; Hirano, Shin-ichi (Department of Applied Chemistry, Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan). Japanese Journal of Applied Physics, Part 1: Regular Papers, Short Notes & Review Papers, 43(10), 7159-7163 (English) 2004 Japan Society of Applied Physics. CODEN: JAPNDE. DOCUMENT TYPE: Journal CA Section: 76 (Electric Phenomena) Section cross-reference(s): 57 Dense (K,Na)NbO3 (KNN)-based ceramics were developed by optimizing the sintering conditions with newly developed K4CuNb8O23 (KCN) as a sintering aid. The sinterability and elec. properties of KNN ceramics were studied as a function of KCN concn. The d. of KNN ceramics increased monotonically with increasing the KCN contents, and reached the highest value of 4.40 g/cm3 with the addn. of 0.5 mol% KCN. This is due to the formation of liq. phase, which significantly promotes the densification of KNN ceramics. The Curie temp. (Tc) of pure KNN ceramics was 420° and decreased with increasing the KCN content. With the addn. of 0.5 mol% KCN, planar mode electromech. coupling factor (kp) and mech. quality factor (Qm) of KNN ceramics also reached the highest values of 0.39 and 1200, resp. The KNN ceramics prepd. with 0.5 mol% KCN exhibited a large field-induced strain of 0.09% at 40 kV/cm and the piezoelec. const. d33 of 180 pm/V.Except for chemicals metioned above, 12196-68-8 and 135035-80-2 are also used. .

Conventionally sintered (Na0

Conventionally sintered (Na0.5,K0.5)NbO3 with barium additions. Ahn, Zou Sam; Schulze, Walter A. (New York State Coll. Ceram., Alfred Univ., Alfred, NY 14802, USA). J. Am. Ceram. Soc., 70(1), C/18-C/21 (English) 1987. CODEN: JACTAW. ISSN: 0002-7820. DOCUMENT TYPE: Journal CA Section: 57 (Ceramics) Section cross-reference(s): 76 The effect of Ba addns. on Na K niobate (NKN) ceramic bodies was investigated with regard to sintering behavior, densification, and elec. 12196-68-8 and 1304-28-5 are cas registry numbers of chemicals which are used as reagents here. properties. Small addns. of Ba retard grain growth and increase d. The soly. limit of Ba is ~1.5 mol%. During firing the loss of Na and K was very low. Both elec. phase transitions in NKN were lowered with Ba addns. The Ba-contg. bodies had higher permittivity values than hot-pressed materials, while radial coupling and d33 were similar to or higher than those of the conventionally sintered pure materials. .