Overview

Joining of metals ceramic parts for high temperature application by complaint (using glue) is prime requirement in the field of solid oxide fuel cell (SOFC), oxygen sensors, thermocouples, high temperature thread lock etc., Development of such high temperature glue are in progress. Sodium silicate/alumina-based glue is successfully developed for 800oC applications. The developed paste was demonstrated by using some of the in-house repair work. Further, successfully join silica and Invar-36 for 800oC application. Additionally, silica, stainless and silicon carbide flange also demonstrated.

Key Features

  • Sealant is in powder and liquid form.
  • As per requirement, one can make past prior to application.
  • Brush, spatula, or dispenser can do application.
  • Low curing temperature in the order of 150oC.

Potential Applications

  • Electrical such as heater and lamps.
  • High temperature sodium batteries
  • Sealant for solid oxide fuel cells
  • Temperature probes bonding to the required surface.
  • Refractory insulations.

Status

  • Feasibility studies on SS/SiC/SiO2 were done
  • Repair on broken porcelain flange was done as in-housework
  • Silica dome and Invar flange was successfully joined for another government sector company.