To provide an inexpensive and high-performance temperature coefficient-improved microwave dielectric material capable of approximating a temperature coefficient to zero and reducing a calcination temperature.
The microwave dielectric material is characterized by having BaLa2Ti3O10 as a temperature improving agent incorporated to a ceramic dielectric composition. Further, the microwave dielectric material is characterized by having colemanite as a calcination temperature reducing agent incorporated into a ceramic dielectric composition. When selecting a homologous material of AxR4Ti3+xO12+3x for a principal constituent (where A is an alkali earth metal element, R is a rare earth element, and the composition ratio X is within the range expressed by 0.5X5) as a ceramic dielectric material, microwave transmitting performance stable to variation of the environmental temperature can be achieved since a temperature coefficient can be approximated to zero. Further, equipment expenses as well as energy costs can be saved because a low temperature calcination furnace can be used since calcination temperature can be reduced even by 100-150C.
OKABE HIROKI
HARADA AKIO
OSATO HITOSHI
OSATO HITOSHI
| JP2003055039A | 2003-02-26 | |||
| JP2003055039A | 2003-02-26 |
JPN6011026543; 高橋順一 他: '共沈法を併用して調整したＢａＯ-Ｌｎ２Ｏ３-ＴｉＯ２系（Ｌｎ＝Ｌａ， Ｎｄ， Ｓｍ）複合粉末の加熱変化と焼結特性' 日本化学会誌 Ｎｏ．１０， ｐｐ．１４２０-１４２５, 1991, 日本化学会
JPN6011026540; ＧＵＨＡ，Ｊ．Ｐ．: 'Ｓｙｎｔｈｅｓｉｓ ａｎｄ Ｃｈａｒａｃｔｅｒｉｚａｔｉｏｎ ｏｆ Ｂａｒｉｕｍ Ｌａｎｔｈａｎｕｍ Ｔｉｔａｎａｔｅｓ' Ｊｏｕｒｎａｌ ｏｆ ｔｈｅ Ａｍｅｒｉｃａｎ Ｃｅｒａｍｉｃ Ｓｏｃｉｅｔｙ Ｖｏｌ．７４， Ｎｏ．４， ｐｐ．８７８-８８０, 1991, Ｗｉｌｅｙ；Ａｍｅｒｉｃａｎ Ｃｅｒａｍｉｃ Ｓｏｃｉｅｔｙ；Ｈｏｂｏｋｅｎ， Ｎ．Ｊ．；Ｗｅｓｔｅ
JPN6011026543; 高橋順一 他: '共沈法を併用して調整したＢａＯ-Ｌｎ２Ｏ３-ＴｉＯ２系（Ｌｎ＝Ｌａ， Ｎｄ， Ｓｍ）複合粉末の加熱変化と焼結特性' 日本化学会誌 Ｎｏ．１０， ｐｐ．１４２０-１４２５, 1991, 日本化学会