Electro-optical polycrystalline barium lanthanum titanium niobate
This patent describes a transparent electro-optic article. It comprises: of a barium lanthanum titanium niobate wherein substantially all grains are of a grain size between about 2 and about 20 micron, the article has a pore volume of less than about 1 percent, and the article has a grain size of between about 2 and about 20 microns. This patent also describes a method of forming transparent electro-optical barium lanthanum titanium niobate. It comprises: providing particles of barium carbonate, lanthanum oxide, titanium oxide, and niobium oxide, calcining the particles, sintering the calcined particles at a temperature of between about 1200{degrees} C and 1300{degrees} C. and a vacuum of between about 10{sup {minus}3} and 10{sup {minus}4} torr while under pressure to form a sintered mass, cooling the sintered mass, slicing the mass to form wafers, heating the wafers in an oxidizing atmosphere.
- Assignee:
- Eastman Kodak Co., Rochester, NY (USA)
- Patent Number(s):
- US 4994421; A
- Application Number:
- PPN: US 7-278994
- OSTI ID:
- 5553783
- Resource Relation:
- Patent File Date: 2 Dec 1988
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BARIUM COMPOUNDS
ELECTRO-OPTICAL EFFECTS
LANTHANUM COMPOUNDS
NIOBATES
TITANIUM COMPOUNDS
OPACITY
SYNTHESIS
ALKALINE EARTH METAL COMPOUNDS
NIOBIUM COMPOUNDS
OPTICAL PROPERTIES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
REFRACTORY METAL COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
360601* - Other Materials- Preparation & Manufacture
360603 - Materials- Properties