Patent ID: 9618473
Date: 2017-04-11
CPC Classifications: G01N

Claim:
1. A gas sensor comprising: a cylindrical housing case; a gas sensor element disposed and fixed to the inside of the cylindrical housing case; and a filler portion formed between the inner surface of the cylindrical housing case and the outer surface of a sensor component installed in the inside of the gas sensor, the filler portion being filled with filler powder containing talc as a layered compound, and the filler portion formed between the cylindrical housing case and the sensor component being completely sealed with the filler powder, wherein the talc of the filler powder has an average particle size within a range from not less than 100 μm to less than 400 μm, and a degree of c-axis orientation within a range of 60% to 85%, and a porosity of the filler portion is not more than 10%, and wherein the filler powder contains water within a range from not less than 0.1 mass % to not more than 1.5 mass % when the filler powder is 100 mass %.