SU1543476A1 - Multilayer interference coating for filament lamps - Google Patents

Abstract

The invention relates to electrical engineering and can be used to obtain multilayer interference coatings on flasks of light sources and on details of optical devices. The aim of the invention is to increase the stability and reproducibility of the optical characteristics of multilayer interference coatings. The coating consists of alternating layers of silicon oxide and one of the stoichiometric oxide compounds of compositions BA LN ₂ O ₄

BA ₃ LN ₄ O ₉

SRLN ₂ O ₄

(BA, SR) LN ₂ O ₄

(BA, SR) LN ₄ O ₉ , where LN is the lanthanide. By varying the number of layers and their optical thickness in the coating, any kind of spectral transmission characteristic of the coating can be obtained. The process of melting and evaporation of these substances when they are sprayed onto a lamp flask proceeds without decomposition. This ensures the stability of the chemical composition of the film coating and the high reproducibility of its optical characteristics with a deviation in the sputtering regimes. 2 silt, 1 tab.

Description

A 0.8 molar solution of ytterbium chloride (0.02 M, 11, 18 g) is precipitated as carbonates (ammonium carbonate is used as a precipitant). Heat treatment of the dried precipitate is carried out at 1200 ° C for 1 hour. The electron beam material is prepared by pressing the tablets under a pressure of 150 kgf / cm2 and sintering in vacuum at 1800 ° C for 1 hour.

Electron-beam sputtering mode at the URMZ.279.047 installation

FOR

BaaYb Og Emission Current, A

Electron beam current, mA

Voltage at the accelerating electrode, kV Pressure in the sputtering chamber, mm Hg Substrate temperature, ° С 250 EXAMPLE 2. Three-layer interference coating

VaugO4 - 310g - BaDy204 Synthesis of Compound. From a mixture of 100 ml of a 0.3-molar solution of barium chloride (O. OZM, 3.81 g) and 67 ml of a 0.9-molar solution of dysprosium chloride (O. O. Z., 8.07 g), carbonate formation. After separation and drying, heat treatment is followed. 3

90

12

for SiO

0.2

60

eight

5-10

250

processing at 1200 C for 1 h,

The electron beam sputtering material is prepared by pressing the tablets under a pressure of 1 to 50 kgf / cm 2 and sintering in vacuum at 1700 ° C for 1 hr;

five

Q

about

0

five

five

40

d ";

In this way, oxide compounds of compositions BaLn20 can be prepared and sprayed onto the substrate; Ba3Ln409; (Ba, Sr) Ln704; (Ba, Sr) 3Ln40 ,, where Ln is lanthanide.

By varying the optical thickness and the number of layers in the coating, almost any kind of spectral transmission characteristic can be obtained, including one when reflected. a significant proportion of IR radiation. According to the technology described in the examples, three-layer coatings were applied on CGMN 12-100-3 lamps, the spectral distribution of radiation power of which is shown in Fig. 2.

Electrical and light characteristics of lamps with and without coating are shown in the table.

These chemical compounds are characterized by the fact that the process of their melting and evaporation when applied to a lamp flask proceeds without decomposition, which ensures the stability of the chemical composition of the film coating and the high reproducibility of its optical characteristics with deviations in the sputtering regimes.

A °

Claims (1)

Formula from 1 gain A multilayer interference coating for incandescent bulbs consisting of alternating silicon oxide ooi and a material with a high refractive index, characterized in that, in order to improve the stability and reproducibility of the optical characteristics, one of the stoichio-metric oxide materials is used as a material with a high refractive index. compounds of sos-, tavov BaLn204; Ba3p4Oe; SrLn404; (Ba, Sr) Lnu04; (Ba, Sr) Ln4Og, where Ln is a lanthanide. Voltage on the lamp, B12 Current through the lamp, A8,3 power consumption, W99,7 Light stream, lm2700 Light return, lm / W27.1 Color temperature, K3150 12 8.0 96 2850 29.7 3280 g, W. 300 LOO 500 600 700 8M 900 WOO figure 1 400 600 800 that 1200 Yourself 1600 1809 2008 2200 FIG. Z