Thermal Barrier Material Formed Of Inorganic Material, Material Set For Producing Same, Material For Base Layers And Method For Producing Same

A heat shielding material comprising:

• a base material;
• A material of the top layer is represented by a Seger formula:
• RO:
• 0.5 to 0.9, R2O:
• 0.1 to 0.5, B2O3:
• 0.0 to 1.0, Al2O3:
• 0.3 to 1.0, SiO2:
• 1.3 to 3.7, SiO2/Al2O3:
• 3.4 to 6.9, where RO is MgO, CaO, or BaO, and R2O is Li2O, Na2O, or K2O.

A heat shielding material comprising:

• a base material;
• a underlayer having a TSR of 80% or more;
• and
• a top layer containing a (Cr,Fe)2O3 solid solution having a ratio (molar ratio) of Cr to Fe of 93 to 97:7 to 3 or a ratio (molar ratio) of Cr to Fe of 80 to 97:20 to 3 and having a non-spinel structure, and having an L* value of 30 or less, wherein
• the top layer has a thickness such that the underlayer is not visually recognizable, and transmits infrared rays, and
• the underlayer includes a reaction region between a material of the underlayer and a material of the top layer, and a main reflection region where the material of the top layer is not present.

A method for producing a heat shielding material made of an inorganic material including:

• a base material;
• a underlayer layered on the base material and having a TSR greater than a TSR of the base material;
• and
• a top layer layered on the underlayer, the top layer having a thickness such that the underlayer is not visually recognizable, and transmitting infrared rays, the method comprising:
• sequentially layering a material of the underlayer and a material of the top layer on the base material;
• and
• performing firing at a temperature at which a hemispherical temperature of HMS measurement of the top layer falls within 100° C. from the temperature.

A heat shielding material made of an inorganic material, comprising:

• a base material;
• a underlayer layered on the base material;
• and
• a top layer layered on the underlayer,
• wherein a material of the underlayer is represented by a Seger formula:
• RO:
• 0.1 to 0.5, R2O:
• 0.5 to 0.9, B2O3:
• 0.0 to 1.0, Al2O3:
• 2.2 to 10.2, SiO2:
• 7.2 to 29.2, TiO2:
• 0.0 to 0.5, ZrSiO4:
• 0.0 to 5.5, SiO2/Al2O3:
• 0.7 to 23.8, where RO is MgO, CaO, or BaO, and R2O is Li2O, Na2O, or K2O, and includes a main reflection region where a material of the top layer is not present.

A material for a underlayer used for an inorganic heat shielding material represented by a Seger formula of RO:

• 0.1 to 0.5, R2O:
• 0.5 to 0.9, B2O3:
• 0.0 to 1.0, Al2O3:
• 2.2 to 10.2, SiO2:
• 7.2 to 29.2, TiO2:
• 0.0 to 0.5, ZrSiO4:
• 0.0 to 5.5, SiO2/Al2O3:
• 0.7 to 23.8, where RO is MgO, CaO, or BaO, and R2O is Li2O, Na2O, or K2O, and has a solar reflectance of 80% or more at a thickness of 100 μm.