
{"publication_number": "US-5459115-A", "abstract": "the dielectric composition according to the present invention is used in a microwave band and is characterized in having a low sintering temperature and a property to be controllable independently in the respect of a dielectric constant and a temperature coefficient of the resonant frequency . the dielectric composition is represented by the formula : a . sub . 1 + a bo . sub . 3 + a wherein a site mainly contains at least pb atom and ca atom which is more than 20 wt % of a and further may contain sr or ba atom , and b site mainly contains fe and nb atoms and further contains at least one atom selected from the group comprising ti and w and may contain at least one atom selected from the group comprising cr , mn , co , ni , cu , zn , si , al , mg , bi and sb .", "application_number": "US-12455293-A", "description": "this example is corresponding to the embodiment defined by the claim 2 of the present invention . starting material comprise pbo , tio 2 , caco 3 , fe 2 o 3 , and nb 2 o 5 of a high purity . after the purity compensation of each of the starting materials , a given amount of each of the starting materials is weighed to give a composition ( pb 1 - x ca x ) 1 + a {( fe 1 / 2 nb 1 / 2 ) 1 - y ti y 