Process for making ultra-fine barium titanate particles
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C01G-023/00
C01G-025/00
C01G-027/00
출원번호
US-0495786
(1995-06-27)
발명자
/ 주소
Stangle Gregory C. (Alfred NY) Venkatachari Koththavasal R. (Rochester NY) Ostrander Steven P. (Scotia NY) Schulze Walter A. (Alfred Station NY)
출원인 / 주소
Alfred University (Alfred NY 02)
인용정보
피인용 횟수 :
11인용 특허 :
0
초록▼
A process for producing ultra-fine barium titanate particles. In the first step of this process, a ceramic precursor material containing a metal cation, a nitrogen-containing material, a solvent, and an anion capable of participating in an anionic oxidation-reduction reaction with the nitrogen-conta
A process for producing ultra-fine barium titanate particles. In the first step of this process, a ceramic precursor material containing a metal cation, a nitrogen-containing material, a solvent, and an anion capable of participating in an anionic oxidation-reduction reaction with the nitrogen-containing material, is provided; the nitrogen-containing material contains at least three nitrogen atoms, at least one oxygen atom, and at least one carbon atom. In the second step of the process, droplets of such ceramic precursor material are formed. In the third step of the process, the droplets are dried until particles which contain less than about 15 weight percent of solvent are produced. In the fourth step of this process, such particles are ignited in an atmosphere which contains substantially less than about 60 weight percent of the solvent\s saturation value in such atmosphere.
대표청구항▼
A process for producing ultra-fine barium titanate particles, comprising the steps of: (a) forming droplets of a ceramic precursor mixture containing a barium ion, titanium ion, a nitrogen-containing fuel, a solvent, and an anion, wherein said nitrogen-containing fuel is of the formula R.(HA)a, and
A process for producing ultra-fine barium titanate particles, comprising the steps of: (a) forming droplets of a ceramic precursor mixture containing a barium ion, titanium ion, a nitrogen-containing fuel, a solvent, and an anion, wherein said nitrogen-containing fuel is of the formula R.(HA)a, and wherein: 1. a in an integer of from 0 to 2, 2. HA is selected from the group consisting of HNO3, HCl, HBr, HI, H2SO4, H2O, and CH3COOH, 3. R is of the formula [Figure] wherein: R1, R2, R3, and R4 are independently selected from the group consisting of hydrogen, alkyl of from 1 to 4 carbon atoms, and phenyl, a′is an integer of from 0 to 2, b is an integer of from 1 to 2, c is c is an integer of from 0 to 2, and a′plus c is at least 1; (b) removing at least about 85 weight percent of the solvent from the droplets of the ceramic precursor mixture to form particles comprising the metal cation, the anion, and the nitrogen-containing fuel, thereby forming dried particles; and (c) subjecting said dried particles to a temperature of from 400 to about 1,100 degrees centigrade and an atmosphere containing less than 0.1 mole percent of carbon dioxide, thereby causing said dried particles to react in an explosive manner.
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이 특허를 인용한 특허 (11)
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