SU785273A1 - Ceramic capacitor material - Google Patents

Description

(54) CERAMIC CONDENSING MATERIAL

  ,.one

The invention relates to the manufacture of ceramic materials for use in electronics and electrical engineering for the manufacture of low-voltage low-frequency capacitors with a high specific capacitance.

A ceramic material based on titanates, stannates, barium zirconates, strontium, manganite, calcium and their solid solutions with various additives of oxides, such as oxides of rare-earth elements, bismuth, silicon 1, is known.

The f2j material prepared at ° C is closest to the invention. new zinc oxide with the addition of oxides (mol.% in excess of 10O%);

 Oa0, O1-1O

, 01-1020

Vor0.05-5

BaO0, O1-5

T-i Od.0,01-5

ZnO Else

This material is characterized by a low dielectric constant, which does not allow it to be used as a capacitor,

The invention of the invention increases the dielectric constant.

The goal is achieved by the fact that the ceramic capacitor material, including zinc oxide, barium oxide, titanium oxide and bismuth oxide, additionally contains niobium oxide, with the following component ratios, by weight,%:

2p91.66-97.61

BaO1,40-4,74

66-2.28

 0.21-0.84

12-0,48

The material is prepared according to the conventional technology of ceramic technology. Samples for testing in the form of pressed discs are calcined in an electric silica oven at 128 ° -135 ° C and held at a final temperature for 2 hours.

Electric; the properties of the ceramic condeohous material teriaio, depending on the composition, are applied in tbl. one.

In tab. Figure 2 presents the data on the frequency change n depending on the measurement (frequencies. For this, the test samples with a diameter of 16–17 mm and a thickness of 3.6–4.0 mm are fired at 13OO C, Electrodes are applied by firing of silver-containing paste.

Measurements of capacitance and the tangent of the angle of electrical losses are carried out on the bridge

R-57 1 with an external general-distributor GZ-. at frequencies of 1-5O kHz.

1 Ceramic capacitor material with an optimal composition has a much higher dielectric constant than the well-known ceramic materials used to make low-frequency capacitors. The use of the obtained material in general-purpose automation microcircuits allows to reduce the dimensions of the products by increasing the specific capacitance and reducing the size of capacitors by a factor of two compared to the known ones.

Table 1

Table

Claims (2)

Claim Ceramic capacitor material, including zinc oxide, barium oxide. titanium oxide, b and bismuth oxide, and Titanium oxide Bismuth oxide Niobium oxide Sources 0.66-2.28 0.21-0.84 0.12-0.48 information, the permittivity, additionally contains the lower ratio Zinc oxide Barium oxide niobium oxide with trace components, wt.%: 91.66-97.61 ' 1.40-4.74 taken into account during the examination 1. USSR copyright certificate No. 438628, cl. C 04 V 35/00, 1972. 2. UK patent No. 1400344, CL From 04 to 35/00, published. 1975 (prototype). ВНИИПИ Order 8751/23 Circulation 671 Subscription Branch PPP 'patent *, Uzhgorod, st. Project, 4