Spectrally-selective solar absorber is required to be thermally stable at high operational temperature. However the currently available absorbers aren't stable beyond 700 degrees C. Here we explore a new absorber with cermet of TiN in SiO2 on LaAlO3 substrate that can be used for long term at 700 degrees C. The optimized cermets contain TiN with volume fraction of 60% and 65% as sun-light absorption media, SiO2 as anti-reflection coating (ARC), and tungsten (W) as infrared (IR) reflection layer. The absorbers demonstrate an absorptance higher than similar to 95% before annealing and similar to 94% after annealing at 700 degrees C, which will be useful for especially concentrated solar applications.