SU929609A1 - Electrical glass composition - Google Patents

Description

(5) ELECTROTECHNICAL GLASS

I

The invention relates to electrical glass compositions intended for the half-body of glassware with the electronic nature of conductivity, and to be used, for example, as a glass bond for conductive layers of cermet resistors.

Known electrotechnical glass of the following composition, weight. %: - 77; A2 /) 0.2 - 1; MpO 10 RjO 0 5 - 23 D3 The disadvantage of the known glass is the absence of a combination of such properties as: crystallization stability, chemical resistance, good wettability to metals and their oxides, the ability to control the electrical conductivity of st1: ol and their powders within wide limits. For this reason, the technical range of application of known glasses in electrical products is very narrow.

The closest to the invention to the technical essence and the achieved result is an electrotechnical glass of the following composition, mass. %: H.li 29.3; 18.9; MNA 26.4; BaO U, 3

Cooking glass is produced in an air atmosphere at 1350 tlO C. Its resistivity is 10 ohms / cm, it is resistant to crystallization, has good wettability to powder, is used in resistive cermet layers as a binder 2j.

The disadvantages of the known glass are its low electrical conductivity and the impossibility of its increase (glass formation is impossible with high MpO contents) and high melting temperature.

The purpose of the invention is to increase the conductivity up to 10 -10 ohm-cm and decrease the reflow temperature. 3 The goal is achieved by the fact that the well-known electrotechnical glass, including Hub, SfOg, BjOj,) t, BaO, additionally contains V Oi at the following component ratio, they say. %: NPO 32.0 - 57.0; 5 hOa 0.5 - 5.5; BjO 27 x- 1.5 10; BaO “, 5 7, 0; VaOg i, 0 - 13.0. In addition, in order to reduce the cooking temperature, electrical glass contains ZhO 5.0–6.0 mol. Components weighed in specific quantities are mixed in headlights with a wet method and dried in a drying cabinet, and then poured into corundum crucibles and cooked in furnaces with silicon heaters at 1200 - with a shutter speed of 30 - kS min in air:. atmosphere. Table 1 shows the specific formulations of the proposed (1 - i |) ste50

5.5 31

3

6.5

it

32

0.5 3i 10

5 13

6 The main physical and technical characteristics of the proposed glasses (ll -) are presented in Table 2. The positive effect of the proposed glass is the possibility of producing structural elements with high surface electric current density, since manganese semiconductor glasses have only surface electronic conductivity, as well as the use of fine glass powder as a semiconductor bonding material, for example, in conductive layers of ceramic resistors - in this case, the scale of nominal values (with a satisfactory TKS) resistive composition Mauger t be expanded to sub-low-impedance values that are not available when using non-manganese semiconductor samples. The economic effect of the introduction-. No glass at one enterprise amounts to 220 thousand rubles. in year. Table 1

Claims (2)

Formula of invention i. Electrotechnical glass, including MnO / S O, g BaO, which is aided by the fact that, in order to increase the electroproduction rate of 10 ohms and decrease the reflow temperature, it additionally contains VjOy in the following ratio of components, mol. %: MpO 32.0 - 57.0; . 0.5 5, 5;, BiOj 27.0 - З, 0; affairs 1,5 10, 0; BaO f, 5 - 7.0; VaOj 5.0 - 13, 2. Electrotechnical glass according to claim 1, characterized in that, in order to reduce the cooking temperature, it further comprises 2ijiO 5.0 - 6.0 mol. % Sources of information taken into account in the examination 1. USSR author's certificate N 59 “35, cl. From 03 On 3/0, 1973. 2. Granules C56-1 glass. Thr. 027.025 TU, 1971 (ootype).